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CN113981357A - High-corrosion-resistance composite coating, preparation and supersonic plasma spraying hole sealing treatment method - Google Patents

High-corrosion-resistance composite coating, preparation and supersonic plasma spraying hole sealing treatment method Download PDF

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Publication number
CN113981357A
CN113981357A CN202111280351.9A CN202111280351A CN113981357A CN 113981357 A CN113981357 A CN 113981357A CN 202111280351 A CN202111280351 A CN 202111280351A CN 113981357 A CN113981357 A CN 113981357A
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powder
composite coating
resistant composite
corrosion
chromium
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鲍崇高
张冲
马海强
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Shaanxi Coal Industry Co Ltd Shennan Industry Development Co ltd
Xian Jiaotong University
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Xian Jiaotong University
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
    • C23C4/134—Plasma spraying
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
    • B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

一种高耐蚀复合涂层、制备及超音速等离子喷涂封孔处理方法，高耐蚀复合涂层原料由陶瓷粉末和金属粉末组成，金属粉末为镍、铬混合粉，陶瓷粉末为碳化铬粉；将碳化铬粉、镍粉、铬粉以及酒精混匀后球磨处理、烘干得到预制粉，预制粉过筛、造粒、再过筛得到高耐蚀复合涂层材料；高耐蚀复合涂层超音速等离子喷涂封孔处理方法是将试样表面依次进行除油去污、喷砂、酒精超声清洗并烘干、预热，再采用超音速等离子喷涂的方法在试样表面进行高耐蚀复合涂层的热喷涂制备，然后采用封孔剂来进行封孔处理，烘烤得到表面有一层高耐蚀复合涂层的试样；本发明通过选择更好的耐蚀粉末、优化工艺参数并进行后期封孔处理，提高液压支架立柱的耐蚀性能。

Figure 202111280351

A high-corrosion-resistant composite coating, preparation and supersonic plasma spraying sealing treatment method, the high-corrosion-resistant composite coating raw material is composed of ceramic powder and metal powder, the metal powder is nickel and chromium mixed powder, and the ceramic powder is chromium carbide powder ;Mixing chromium carbide powder, nickel powder, chromium powder and alcohol, ball milling, drying to obtain prefabricated powder, prefabricated powder is sieved, granulated, and then sieved to obtain high corrosion-resistant composite coating material; high corrosion-resistant composite coating material The supersonic plasma spraying sealing treatment method is to degr The composite coating is prepared by thermal spraying, and then the sealing agent is used for sealing treatment, and the sample with a layer of high corrosion-resistant composite coating on the surface is obtained by baking; the invention selects better corrosion-resistant powder, optimizes process parameters and Carry out post-sealing treatment to improve the corrosion resistance of hydraulic support columns.

Figure 202111280351

Description

High-corrosion-resistance composite coating, preparation and supersonic plasma spraying hole sealing treatment method
Technical Field
The invention belongs to the technical field of preparation of thermal spraying corrosion-resistant coatings, and particularly relates to a high-corrosion-resistant composite coating, preparation and a hole sealing treatment method by supersonic plasma spraying.
Background
The hydraulic support upright post interacts with surrounding rocks in the technical field of comprehensive mechanized coal mining to control a top plate rock stratum of a working face working area, provide a safe working space for a working face and play a role in supporting the top plate. However, the vertical columns and jacks of the underground working face support of the coal mine have the conditions of bulging, bubbling, annular, flaky and banded corrosion of a coating, needle-eye-shaped dense corrosion points and the like when the vertical columns and jacks of the underground working face support of the coal mine are used for a long time, so that a large amount of corrosion failure and performance reduction of the vertical columns and jacks of the hydraulic support are caused, the service lives of the vertical columns and jacks are seriously influenced, and great economic loss and potential safety hazards are caused. The traditional coating protection, hot-dip galvanizing protection and hot-spray zinc and coating composite protective layer obtain certain use effect in the surface protection process, but the design service life of a mine is still difficult to meet.
Compared with the common plasma spraying (spraying particle speed of 200-400m/s), the supersonic plasma spraying (SAPS) has the outstanding advantages that the jet flow speed is high (450-900m/s), and the bonding strength, compactness and porosity of the coating are improved. However, the corrosion resistance research on the application of the SAPS spray corrosion-resistant coating to the hydraulic support column of the coal mining machine is not completely mature, and a plurality of key application performances are required to be further improved. Therefore, how to prepare a coating with high corrosion resistance and relatively low processing cost is a technical problem which needs to be solved urgently at present.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a high-corrosion-resistance composite coating, a preparation method and a supersonic plasma spraying hole sealing treatment method, which improve the corrosion resistance of the hydraulic support stand column by selecting better corrosion-resistant powder, optimizing process parameters and carrying out post hole sealing treatment.
In order to achieve the purpose, the invention adopts the following technical scheme:
the high-corrosion-resistance composite coating comprises the following raw materials of ceramic powder and metal powder, wherein the content of the metal powder is 20-30% of the weight of the high-corrosion-resistance composite coating powder, and the ceramic powder is 70-80% of the weight of the high-corrosion-resistance composite coating powder; the metal powder is nickel and chromium mixed powder, and the mass ratio of the nickel powder to the chromium powder is 1: 1; the ceramic powder is chromium carbide powder;
the chromium carbide powder is spherical-like powder with d50 being 15-45 mu m;
the nickel powder is a sphere-like powder with d50 being 15-45 mu m;
the chromium powder is spherical-like powder with d50 being 15-45 mu m.
The preparation method of the high-corrosion-resistance composite coating comprises the steps of uniformly mixing chromium carbide powder, nickel powder, chromium powder and alcohol, carrying out ball milling treatment, and drying to obtain pre-prepared powder, wherein the mass of the alcohol is 1.5-2.5 times that of the high-corrosion-resistance composite coating powder;
the ball milling treatment comprises the following steps: uniformly mixing the high-corrosion-resistance composite coating powder with alcohol, and performing ball milling treatment on the mixture for at least 18 hours on a ball mill at the rotating speed of 240-380 r/min;
the drying treatment comprises the following steps: keeping the temperature in a drying box for 30min, wherein the heating temperature is 50-100 ℃;
and sieving the prefabricated powder with a 50-70-mesh sieve, then granulating and sieving with a 50-70-mesh sieve to obtain the high-corrosion-resistant composite coating material.
The supersonic plasma spraying hole sealing treatment method for the high-corrosion-resistance composite coating comprises the following steps of:
step 1, carrying out oil and stain removal treatment on the surface of a sample;
step 2, carrying out sand blasting treatment on the surface of the sample subjected to the oil and stain removal treatment in the step 1;
step 3, carrying out alcohol ultrasonic cleaning on the surface of the sample subjected to sand blasting in the step 2, and drying;
step 4, heating and preheating the surface of the sample cleaned in the step 3;
step 5, carrying out thermal spraying preparation of the high-corrosion-resistance composite coating on the surface of the sample obtained in the step 4 by adopting a supersonic plasma spraying method;
and 6, carrying out hole sealing treatment on the surface of the sample obtained in the step 5 by using a hole sealing agent, and then putting the sample into a drying oven at the temperature of 100-120 ℃ for baking for 1-2 hours to obtain the sample with the surface provided with the high-corrosion-resistance composite coating.
And (3) washing or wiping treatment is carried out by adopting gasoline or ethanol during oil removal in the step 1.
In the step 2, the sand blasting sand grains are carborundum with the grain size of 80-120 meshes during sand blasting treatment; the sand blasting pressure is controlled within the range of 0.2MPa to 0.5 MPa.
And 3, when the alcohol is subjected to ultrasonic cleaning in the step 3, the cleaning time is 30 minutes, the temperature is controlled to be 20-30 ℃, and the frequency is 70 Hz.
And in the step 4, the surface is preheated, the temperature is controlled to be 80-90 ℃, and the time is 20-30 min.
The parameters of the supersonic plasma spraying in the step 5 are as follows: the spraying voltage is 130-135V, the spraying current is 400-420A, the spraying pressure is 0.7-0.8MPa, the spraying distance is 100-120 mm, the spraying gas source is compressed air and Ar gas, and the main gas flow is 25.4 L.min-1The flow rate of the auxiliary gas Ar is 220 L.min-1(ii) a The thickness of the high-corrosion-resistance composite coating is 200 mu m.
The sealing treatment method in the step 6 comprises the following steps: and (3) dipping the sample coated with the high-corrosion-resistant composite coating on the surface into a hole sealing agent or dipping the hole sealing agent by using gauze to wipe the surface of the high-corrosion-resistant composite coating, taking the sample out of the hole sealing agent and then placing the sample in a drying box for drying for 1-2 h.
The hole sealing agent comprises acrylic resin, nano chromium oxide, absolute ethyl alcohol and butyl acetate, wherein the mass part of the acrylic resin is 0.5-5 parts, and the mass part of the nano chromium oxide is 0.5-2 parts, calculated by taking the total mass of the absolute ethyl alcohol and the butyl acetate as 100 parts;
when the total mass of the absolute ethyl alcohol and the butyl acetate is 100 parts, the mass part of the absolute ethyl alcohol is 10-90 parts.
The preparation method of the hole sealing agent comprises the following steps: mixing acrylic resin, nano chromium oxide, absolute ethyl alcohol and butyl acetate, stirring for 4-8h at the room temperature of-80 ℃, wherein the rotating speed during stirring is 300-1000 r/min, and obtaining the hole sealing agent.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the method selects the supersonic plasma spraying method to prepare the high-corrosion-resistance composite coating on the surface of the hydraulic support upright post, has high coating quality and obvious corrosion-resistance effect, is better than the common thermal spraying technology, and has higher cost performance.
2. After the surface is subjected to hole sealing treatment, an electrochemical test is carried out, and the corrosion resistant effect is remarkably improved.
3. The high-corrosion-resistance composite coating can meet the protection performance requirements of components such as hydraulic support stand columns and the like in the comprehensive mechanized coal mining technology in the coal mining, coal storage and coal transportation operation processes, realizes effective protection of the hydraulic support stand columns, and has great significance in maintaining the service performance of the coal mining machine and the hydraulic support stand columns and prolonging the service life.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention.
FIG. 2 is a schematic view of embodiment 1, in which a metal ceramic coating is prepared on the surface of a hydraulic support column.
FIG. 3 is a schematic diagram of the embodiment 1 after a metal ceramic coating is prepared on the surface of a hydraulic support column and hole sealing treatment is carried out.
FIG. 4 is a graph of open circuit voltage before, after and after hole sealing treatment in supersonic plasma spraying in example 1.
FIG. 5 is a polarization curve diagram of the supersonic plasma spraying, and the sealing in example 1.
Detailed Description
The present invention will be described in further detail with reference to the following examples and accompanying drawings.
Example 1, a high corrosion resistant composite coating, which is composed of ceramic powder and metal powder, wherein the metal powder accounts for 30% of the high corrosion resistant composite coating powder by mass, and the ceramic powder accounts for 70% of the high corrosion resistant composite coating powder by mass; the metal powder is nickel and chromium mixed powder, and the mass ratio of the nickel powder to the chromium powder is 1: 1; the ceramic powder is chromium carbide powder;
the chromium carbide powder is spherical powder with d50 being 25 mu m;
the nickel powder is spheroidic powder with d50 being 35 mu m;
the chromium powder is spherical powder with d50 being 25 mu m.
The preparation method of the high-corrosion-resistance composite coating comprises the steps of uniformly mixing chromium carbide powder, nickel powder, chromium powder and alcohol, carrying out ball milling treatment, and drying to obtain pre-prepared powder, wherein the mass of the alcohol is 2.5 times that of the metal ceramic powder;
the ball milling treatment comprises the following steps: after the high corrosion-resistant composite coating powder and alcohol are uniformly mixed, ball-milling the mixture for 18 hours on a ball mill at the rotating speed of 260 r/min;
the drying treatment comprises the following steps: keeping the temperature in a drying oven for 30min, wherein the heating temperature is 80 ℃;
and sieving the prefabricated powder with a 70-mesh sieve, then granulating and sieving with the 70-mesh sieve to obtain the high-corrosion-resistance composite coating material.
The supersonic plasma spraying hole sealing treatment method for the high-corrosion-resistance composite coating, as shown in figure 1, comprises the following steps:
step 1, performing oil and stain removal treatment on the surface of a hydraulic support upright post;
step 2, carrying out sand blasting treatment on the surface of the hydraulic support upright post subjected to the oil and stain removal treatment in the step 1;
step 3, carrying out alcohol ultrasonic cleaning on the surface of the hydraulic support stand column subjected to sand blasting treatment in the step 2, and drying;
step 4, heating and preheating the surface of the hydraulic support stand column cleaned in the step 3;
step 5, performing thermal spraying preparation of the high-corrosion-resistance composite coating on the surface of the hydraulic support stand column obtained in the step 4 by adopting a supersonic plasma spraying method, as shown in fig. 2;
and 6, carrying out hole sealing treatment on the surface of the hydraulic support stand column obtained in the step 5 by adopting a hole sealing agent, and then placing the hydraulic support stand column into a drying oven at 100 ℃ for baking for 2 hours to obtain the hydraulic support stand column with the surface provided with the high-corrosion-resistance composite coating, as shown in fig. 3.
And (3) washing or wiping treatment is carried out by adopting gasoline or ethanol during oil removal in the step 1.
The sand blasting sand grains in the sand blasting treatment in the step 2 are carborundum with the grain size of 80 meshes; the pressure of the sand blasting is controlled within 0.4 Mpa.
And 3, when the alcohol is subjected to ultrasonic cleaning in the step 3, the cleaning time is 30 minutes, the temperature is controlled at 25 ℃, and the frequency is 70 Hz.
And in the step 4, the surface is preheated, the temperature is controlled at 80 ℃, and the time is 30 min.
The parameters of the supersonic plasma spraying in the step 5 are as follows: spraying voltage of 135V, spraying current of 420A, spraying pressure of 0.7MPa, spraying distance of 100mm, compressed air and Ar gas as spraying gas source, and main gas flow of 25.4 L.min-1The flow rate of the auxiliary gas Ar is 220 L.min-1(ii) a The thickness of the high-corrosion-resistance composite coating is 200 mu m.
The sealing treatment method in the step 6 comprises the following steps: dipping the hydraulic support stand column coated with the high-corrosion-resistant composite coating on the surface into a hole sealing agent or dipping the hole sealing agent by using gauze to wipe the surface of the high-corrosion-resistant composite coating, then taking out the sample from the hole sealing agent and placing the sample in a drying box for drying for 2 hours.
The hole sealing agent comprises acrylic resin, nano chromium oxide, absolute ethyl alcohol and butyl acetate, wherein the mass part of the acrylic resin is 2 parts, and the mass part of the nano chromium oxide is 1 part, calculated by taking the total mass of the absolute ethyl alcohol and the butyl acetate as 100 parts;
when the total mass of the absolute ethyl alcohol and the butyl acetate is 100 parts, the mass part of the absolute ethyl alcohol is 80 parts.
The preparation method of the hole sealing agent comprises the following steps: mixing acrylic resin, nano chromium oxide, absolute ethyl alcohol and butyl acetate, stirring for 6 hours at room temperature, wherein the rotating speed during stirring is 400 r/min, and thus obtaining the hole sealing agent.
The beneficial effect of this embodiment does: after sealing the surface, an electrochemical test was performed as shown in FIGS. 4 and 5It shows that the open circuit voltage of the hydraulic support column original piece is-0.747V, and the corrosion current density is 3.88 multiplied by 10-5A/cm2(ii) a The open-circuit voltage of the sample after supersonic plasma spraying is-0.115V, and the corrosion current density is 4.09 multiplied by 10-7A/cm2The corrosion resistance effect is obviously improved.
Example 2, a high corrosion resistant composite coating, which is composed of ceramic powder and metal powder, wherein the metal powder accounts for 20% of the high corrosion resistant composite coating powder by mass, and the ceramic powder accounts for 80% of the high corrosion resistant composite coating powder by mass; the metal powder is nickel and chromium mixed powder, and the mass ratio of the nickel powder to the chromium powder is 1: 1; the ceramic powder is chromium carbide powder;
the chromium carbide powder is spheroidal powder with d50 being 45 mu m;
the nickel powder is spheroidic powder with d50 being 15 mu m;
the chromium powder is spherical powder with d50 being 15 mu m.
The preparation method of the high-corrosion-resistance composite coating comprises the steps of uniformly mixing chromium carbide powder, nickel powder, chromium powder and alcohol, carrying out ball milling treatment, and drying to obtain pre-prepared powder, wherein the mass of the alcohol is 1.5 times that of the high-corrosion-resistance composite coating powder;
the ball milling treatment comprises the following steps: after the high corrosion-resistant composite coating powder and alcohol are uniformly mixed, ball-milling the mixture for 20 hours on a ball mill at the rotating speed of 240 r/min;
the drying treatment comprises the following steps: keeping the temperature in a drying oven for 30min, wherein the heating temperature is 50 ℃;
and sieving the prefabricated powder with a 60-mesh sieve, then granulating and sieving with the 60-mesh sieve to obtain the high-corrosion-resistance composite coating material.
The supersonic plasma spraying hole sealing treatment method for the high-corrosion-resistance composite coating comprises the following steps of:
step 1, performing oil and stain removal treatment on the surface of a hydraulic support upright post;
step 2, carrying out sand blasting treatment on the surface of the hydraulic support upright post subjected to the oil and stain removal treatment in the step 1;
step 3, carrying out alcohol ultrasonic cleaning on the surface of the hydraulic support stand column subjected to sand blasting treatment in the step 2, and drying;
step 4, heating and preheating the surface of the hydraulic support stand column cleaned in the step 3;
step 5, performing thermal spraying preparation of the high-corrosion-resistance composite coating on the surface of the hydraulic support stand column obtained in the step 4 by adopting a supersonic plasma spraying method;
and 6, carrying out hole sealing treatment on the surface of the hydraulic support stand column obtained in the step 5 by adopting a hole sealing agent, and then placing the hydraulic support stand column into a 120 ℃ oven to be baked for 1 hour to obtain the hydraulic support stand column with the surface provided with the high-corrosion-resistance composite coating.
And (3) washing or wiping treatment is carried out by adopting gasoline or ethanol during oil removal in the step 1.
In the step 2, the sand blasting sand grains are carborundum with the grain size of 105 meshes during the sand blasting treatment; the pressure of the sand blasting is controlled within 0.2 Mpa.
And 3, when the alcohol is subjected to ultrasonic cleaning in the step 3, the cleaning time is 30 minutes, the temperature is controlled at 28 ℃, and the frequency is 70 Hz.
And in the step 4, the surface is preheated, the temperature is controlled to be 83 ℃, and the time is 26 min.
The parameters of the supersonic plasma spraying in the step 5 are as follows: spraying voltage is 135V, spraying current is 400A, spraying pressure is 0.75MPa, spraying distance is 110mm, spraying air sources are compressed air and Ar gas, and main gas flow is 25.4 L.min-1The flow rate of the auxiliary gas Ar is 220 L.min-1(ii) a The thickness of the high-corrosion-resistance composite coating is 200 mu m.
The sealing treatment method in the step 6 comprises the following steps: dipping the hydraulic support stand column coated with the high-corrosion-resistant composite coating on the surface into a hole sealing agent or dipping the hole sealing agent by using gauze to wipe the surface of the high-corrosion-resistant composite coating, then taking out the sample from the hole sealing agent and placing the sample in a drying box for drying for 1 h.
The hole sealing agent comprises acrylic resin, nano chromium oxide, absolute ethyl alcohol and butyl acetate, wherein the mass part of the acrylic resin is 5 parts, and the mass part of the nano chromium oxide is 2 parts, calculated by taking the total mass of the absolute ethyl alcohol and the butyl acetate as 100 parts;
when the total mass of the absolute ethyl alcohol and the butyl acetate is 100 parts, the mass part of the absolute ethyl alcohol is 10 parts.
The preparation method of the hole sealing agent comprises the following steps: mixing acrylic resin, nano chromium oxide, absolute ethyl alcohol and butyl acetate, stirring for 5 hours at the temperature of 30 ℃, wherein the rotating speed during stirring is 500 r/min, and thus obtaining the hole sealing agent.
The beneficial effect of this embodiment does: in this embodiment, after the surface is subjected to hole sealing treatment, an electrochemical test is performed, and the open-circuit voltage of the hydraulic support column element is-0.770V, and the corrosion current density is 3.72 × 10-5A/cm2(ii) a The open-circuit voltage of the sample after supersonic plasma spraying is-0.198V, and the corrosion current density is 5.51 multiplied by 10-7A/cm2The corrosion resistance effect is obviously improved.
Example 3, a high corrosion resistant composite coating, which is composed of ceramic powder and metal powder, wherein the metal powder accounts for 25% of the weight of the high corrosion resistant composite coating powder, and the ceramic powder accounts for 75% of the weight of the high corrosion resistant composite coating powder; the metal powder is nickel and chromium mixed powder, and the mass ratio of the nickel powder to the chromium powder is 1: 1; the ceramic powder is chromium carbide powder;
the chromium carbide powder is spherical powder with d50 ═ 35 mu m;
the nickel powder is spheroidic powder with d50 being 20 mu m;
the chromium powder is a spheroidal powder with d50 being 20 mu m.
The preparation method of the high-corrosion-resistance composite coating comprises the steps of uniformly mixing chromium carbide powder, nickel powder, chromium powder and alcohol, carrying out ball milling treatment, and drying to obtain pre-prepared powder, wherein the mass of the alcohol is 1.5 times that of the high-corrosion-resistance composite coating powder;
the ball milling treatment comprises the following steps: after the high corrosion-resistant composite coating powder and alcohol are uniformly mixed, ball-milling the mixture for 21 hours on a ball mill at the rotating speed of 300 r/min;
the drying treatment comprises the following steps: keeping the temperature in a drying oven for 30min, wherein the heating temperature is 100 ℃;
and sieving the prefabricated powder with a 50-mesh sieve, then granulating and sieving with a 50-mesh sieve to obtain the high-corrosion-resistance composite coating material.
The supersonic plasma spraying hole sealing treatment method for the high-corrosion-resistance composite coating comprises the following steps of:
step 1, performing oil and stain removal treatment on the surface of a hydraulic support upright post;
step 2, carrying out sand blasting treatment on the surface of the hydraulic support upright post subjected to the oil and stain removal treatment in the step 1;
step 3, carrying out alcohol ultrasonic cleaning on the surface of the hydraulic support stand column subjected to sand blasting treatment in the step 2, and drying;
step 4, heating and preheating the surface of the hydraulic support stand column cleaned in the step 3;
step 5, performing thermal spraying preparation of the high-corrosion-resistance composite coating on the surface of the hydraulic support stand column obtained in the step 4 by adopting a supersonic plasma spraying method;
and 6, carrying out hole sealing treatment on the surface of the hydraulic support stand column obtained in the step 5 by adopting a hole sealing agent, and then putting the hydraulic support stand column into a drying oven at 100 ℃ for baking for 2 hours to obtain the hydraulic support stand column with the surface provided with the high-corrosion-resistance composite coating.
And (3) washing or wiping treatment is carried out by adopting gasoline or ethanol during oil removal in the step 1.
The sand blasting sand grains in the sand blasting treatment in the step 2 are carborundum with the grain size of 120 meshes; the pressure of the sand blasting is controlled within 0.5 Mpa.
And 3, when the alcohol is subjected to ultrasonic cleaning in the step 3, the cleaning time is 30 minutes, the temperature is controlled at 28 ℃, and the frequency is 70 Hz.
And in the step 4, the surface is preheated, the temperature is controlled to be 85 ℃, and the time is 27 min.
The parameters of the supersonic plasma spraying in the step 5 are as follows: spraying voltage of 130V, spraying current of 400A, spraying pressure of 0.75MPa, spraying distance of 105mm, compressed air and Ar gas as spraying gas source, and main gas flow of 25.4 L.min-1The flow rate of the auxiliary gas Ar is 220 L.min-1(ii) a The thickness of the high-corrosion-resistance composite coating is 200 mu m.
The sealing treatment method in the step 6 comprises the following steps: dipping the hydraulic support stand column coated with the high-corrosion-resistant composite coating on the surface into a hole sealing agent or dipping the hole sealing agent by using gauze to wipe the surface of the high-corrosion-resistant composite coating, then taking out the sample from the hole sealing agent and placing the sample in a drying box for drying for 2 hours.
The hole sealing agent comprises acrylic resin, nano chromium oxide, absolute ethyl alcohol and butyl acetate, wherein the mass part of the acrylic resin is 4 parts, and the mass part of the nano chromium oxide is 1 part, calculated by taking the total mass of the absolute ethyl alcohol and the butyl acetate as 100 parts;
when the total mass of the absolute ethyl alcohol and the butyl acetate is 100 parts, the mass part of the absolute ethyl alcohol is 80 parts.
The preparation method of the hole sealing agent comprises the following steps: mixing acrylic resin, nano chromium oxide, absolute ethyl alcohol and butyl acetate, stirring for 8 hours at the temperature of 50 ℃, wherein the rotating speed during stirring is 300r/min, and thus obtaining the hole sealing agent.
The beneficial effect of this embodiment does: in this embodiment, after the surface is subjected to hole sealing treatment, an electrochemical test is performed, the open-circuit voltage of the hydraulic support column element is-0.721V, and the corrosion current density is 3.91 × 10-5A/cm2(ii) a The open-circuit voltage of the sample after supersonic plasma spraying is-0.128V, and the corrosion current density is 4.36 multiplied by 10-7A/cm2The corrosion resistance effect is obviously improved.
Example 4, a high corrosion resistant composite coating, which is composed of ceramic powder and metal powder, wherein the metal powder accounts for 25% of the weight of the high corrosion resistant composite coating powder, and the ceramic powder accounts for 75% of the weight of the high corrosion resistant composite coating powder; the metal powder is nickel and chromium mixed powder, and the mass ratio of the nickel powder to the chromium powder is 1: 1; the ceramic powder is chromium carbide powder;
the chromium carbide powder is spherical powder with d50 being 15 mu m;
the nickel powder is spheroidic powder with d50 being 45 mu m;
the chromium powder is spheroidal powder with d50 being 45 mu m.
The preparation method of the high-corrosion-resistance composite coating comprises the steps of uniformly mixing chromium carbide powder, nickel powder, chromium powder and alcohol, carrying out ball milling treatment, and drying to obtain pre-prepared powder, wherein the mass of the alcohol is 2 times that of the high-corrosion-resistance composite coating powder;
the ball milling treatment comprises the following steps: after the high corrosion-resistant composite coating powder and alcohol are uniformly mixed, ball-milling the mixture for 25 hours on a ball mill at the rotating speed of 380 r/min;
the drying treatment comprises the following steps: keeping the temperature in a drying oven for 30min, wherein the heating temperature is 70 ℃;
and sieving the prefabricated powder with a 60-mesh sieve, then granulating and sieving with the 60-mesh sieve to obtain the high-corrosion-resistance composite coating material.
The supersonic plasma spraying hole sealing treatment method for the high-corrosion-resistance composite coating comprises the following steps of:
step 1, performing oil and stain removal treatment on the surface of a hydraulic support upright post;
step 2, carrying out sand blasting treatment on the surface of the hydraulic support upright post subjected to the oil and stain removal treatment in the step 1;
step 3, carrying out alcohol ultrasonic cleaning on the surface of the hydraulic support stand column subjected to sand blasting treatment in the step 2, and drying;
step 4, heating and preheating the surface of the hydraulic support stand column cleaned in the step 3;
step 5, performing thermal spraying preparation of the high-corrosion-resistance composite coating on the surface of the hydraulic support stand column obtained in the step 4 by adopting a supersonic plasma spraying method;
and 6, carrying out hole sealing treatment on the surface of the hydraulic support stand column obtained in the step 5 by adopting a hole sealing agent, and then placing the hydraulic support stand column into a 115 ℃ oven to bake for 1.5 hours to obtain the hydraulic support stand column with the surface provided with the high-corrosion-resistance composite coating.
And (3) washing or wiping treatment is carried out by adopting gasoline or ethanol during oil removal in the step 1.
The sand blasting sand grains in the sand blasting treatment in the step 2 are carborundum with the grain size of 90 meshes; the pressure of the sand blasting is controlled within 0.4 Mpa.
And 3, when the alcohol is subjected to ultrasonic cleaning in the step 3, the cleaning time is 30 minutes, the temperature is controlled at 30 ℃, and the frequency is 70 Hz.
And in the step 4, the surface is preheated, the temperature is controlled at 90 ℃, and the time is 20 min.
The steps areThe parameters of the supersonic plasma spraying in the step 5 are as follows: the spraying voltage is 132V, the spraying current is 415A, the spraying air pressure is 0.8MPa, the spraying distance is 120mm, the spraying air source is compressed air and Ar gas, and the main gas flow is 25.4 L.min-1The flow rate of the auxiliary gas Ar is 220 L.min-1(ii) a The thickness of the high-corrosion-resistance composite coating is 200 mu m.
The sealing treatment method in the step 6 comprises the following steps: and (3) dipping the hydraulic support stand column with the high-corrosion-resistant composite coating on the surface into a hole sealing agent or dipping the hole sealing agent by using gauze to wipe the surface of the high-corrosion-resistant composite coating, taking out the sample from the hole sealing agent and then placing the sample in a drying box for drying for 1.5 h.
The hole sealing agent comprises acrylic resin, nano chromium oxide, absolute ethyl alcohol and butyl acetate, wherein the mass part of the acrylic resin is 0.5 part, and the mass part of the nano chromium oxide is 0.5 part, calculated by taking the total mass of the absolute ethyl alcohol and the butyl acetate as 100 parts;
when the total mass of the absolute ethyl alcohol and the butyl acetate is 100 parts, the mass part of the absolute ethyl alcohol is 90 parts.
The preparation method of the hole sealing agent comprises the following steps: mixing acrylic resin, nano chromium oxide, absolute ethyl alcohol and butyl acetate, stirring for 4 hours at the temperature of 80 ℃, wherein the rotating speed during stirring is 1000 revolutions per minute, and thus obtaining the hole sealing agent.
The beneficial effect of this embodiment does: in this embodiment, after the surface is subjected to hole sealing treatment, an electrochemical test is performed, and the open-circuit voltage of the hydraulic support column original is-0.759V, and the corrosion current density is 3.85 × 10-5A/cm2(ii) a The open-circuit voltage of the sample after supersonic plasma spraying is-0.154V, and the corrosion current density is 4.62 multiplied by 10-7A/cm2The corrosion resistance effect is obviously improved.

Claims (13)

1.一种高耐蚀复合涂层，其特征在于：其原料由陶瓷粉末和金属粉末组成，金属粉末含量为高耐蚀复合涂层粉末质量的20％～30％，陶瓷粉末为高耐蚀复合涂层粉末质量的70％～80％；金属粉末为镍、铬混合粉，镍粉、铬粉的质量比为1:1；陶瓷粉末为碳化铬粉；1. A high corrosion-resistant composite coating is characterized in that: its raw material is composed of ceramic powder and metal powder, the metal powder content is 20% to 30% of the powder quality of the high-corrosion-resistant composite coating, and the ceramic powder is a high-corrosion-resistant composite coating. 70% to 80% of the mass of the composite coating powder; the metal powder is nickel and chromium mixed powder, and the mass ratio of nickel powder and chromium powder is 1:1; the ceramic powder is chromium carbide powder; 所述的碳化铬粉为d50＝15～45μm的类球形粉末；The chromium carbide powder is a spherical powder with d50=15-45 μm; 所述的镍粉为d50＝15～45μm的类球形粉末；The nickel powder is spherical powder with d50=15～45μm; 所述的铬粉为d50＝15～45μm的类球形粉末。The chromium powder is a spherical powder with d50=15-45 μm. 2.根据权利要求1所述的一种高耐蚀复合涂层的制备方法，其特征在于：将碳化铬粉、镍粉、铬粉以及酒精混合均匀后球磨处理、烘干得到预制粉，酒精质量为高耐蚀复合涂层粉末质量的1.5-2.5倍；2. the preparation method of a kind of high corrosion-resistant composite coating according to claim 1, is characterized in that: ball milling treatment after mixing chromium carbide powder, nickel powder, chromium powder and alcohol, drying obtains prefabricated powder, alcohol The quality is 1.5-2.5 times the quality of the high corrosion-resistant composite coating powder; 所述的球磨处理为：将高耐蚀复合涂层粉末和酒精混合均匀后，在球磨机上球磨处理至少18h，转速为240～380r/min；The ball-milling treatment is as follows: after the high corrosion-resistant composite coating powder and the alcohol are evenly mixed, the ball-milling treatment is performed on a ball mill for at least 18 hours, and the rotational speed is 240-380 r/min; 所述的烘干处理为：在烘干箱中保温30min，加热温度为50～100℃；The drying treatment is as follows: keeping the temperature in a drying box for 30 minutes, and the heating temperature is 50-100°C; 所述的预制粉过50-70目筛，随后造粒再过50-70目筛得到高耐蚀复合涂层材料。The prefabricated powder is passed through a 50-70 mesh sieve, and then granulated and then passed through a 50-70 mesh sieve to obtain a high corrosion-resistant composite coating material. 3.权利要求1所述的一种高耐蚀复合涂层超音速等离子喷涂封孔处理方法，其特征在于，包括以下步骤：3. a kind of high corrosion-resistant composite coating supersonic plasma spray sealing method of claim 1, is characterized in that, comprises the following steps: 步骤1，将试样表面进行除油去污处理；Step 1: Degrease and decontaminate the surface of the sample; 步骤2，对经过步骤1除油去污处理后的试样表面进行喷砂处理；Step 2, sandblasting the surface of the sample after the degreasing and decontamination treatment in step 1; 步骤3，对经过步骤2喷砂处理后的试样表面进行酒精超声清洗，并烘干；Step 3, carry out alcohol ultrasonic cleaning on the surface of the sample after sandblasting in step 2, and dry it; 步骤4，对经过步骤3清洗干净后的试样表面进行加热预热；Step 4, heating and preheating the surface of the sample cleaned in step 3; 步骤5，采用超音速等离子喷涂的方法在步骤4得到的试样表面进行高耐蚀复合涂层的热喷涂制备；Step 5, using the method of supersonic plasma spraying to prepare the high corrosion-resistant composite coating by thermal spraying on the surface of the sample obtained in step 4; 步骤6，对步骤5得到的试样表面采用封孔剂来进行封孔处理，之后放入100～120℃烘箱中烘烤1～2小时，得到表面有一层高耐蚀复合涂层的试样。In step 6, the surface of the sample obtained in step 5 is sealed with a sealing agent, and then placed in an oven at 100 to 120° C. for 1 to 2 hours to obtain a sample with a high corrosion-resistant composite coating on the surface. . 4.根据权利要求3所述的方法，其特征在于，所述的步骤5中超音速等离子喷涂时的参数为：喷涂电压为130-135V，喷涂电流为400-420A，喷涂气压为0.7-0.8MPa，喷涂距离为100～120mm，喷涂气源为压缩空气及Ar气，主气流量为25.4L·min-1，辅气流量Ar气流量为220L·min-1；所述高耐蚀复合涂层的厚度为200μm。4. method according to claim 3, is characterized in that, parameter during supersonic plasma spraying in described step 5 is: spraying voltage is 130-135V, spraying current is 400-420A, spraying air pressure is 0.7-0.8MPa , the spraying distance is 100-120mm, the spraying gas source is compressed air and Ar gas, the main gas flow is 25.4L·min -1 , and the auxiliary gas flow Ar gas flow is 220L·min -1 ; the high corrosion-resistant composite coating The thickness is 200 μm. 5.根据权利要求3所述的方法，其特征在于，所述的步骤6中封孔处理方法为：将表面涂有高耐蚀复合涂层的试样浸渍到封孔剂中或是采用纱布蘸取封孔剂擦拭高耐蚀复合涂层表面，然后将试样从封孔剂中取出后放置在干燥箱中1-2h烘干。5. method according to claim 3, is characterized in that, in described step 6, the sealing treatment method is: dipping the sample whose surface is coated with high corrosion-resistant composite coating into sealing agent or using gauze Dip the pore sealing agent to wipe the surface of the high corrosion-resistant composite coating, then take the sample out of the pore sealing agent and place it in a drying oven for 1-2 hours to dry. 6.根据权利要求5所述的方法，其特征在于，所述的封孔剂包括丙烯酸树脂、纳米氧化铬、无水乙醇和乙酸丁酯，以无水乙醇和乙酸丁酯的总质量为100份计算，丙烯酸树脂的质量份数为0.5-5份，纳米氧化铬的质量份数为0.5-2份；6. method according to claim 5, is characterized in that, described pore sealing agent comprises acrylic resin, nano-chromium oxide, dehydrated alcohol and butyl acetate, with the total mass of dehydrated alcohol and butyl acetate being 100 In parts calculation, the mass fraction of acrylic resin is 0.5-5 parts, and the mass fraction of nano-chromium oxide is 0.5-2 parts; 所述的无水乙醇和乙酸丁酯的总质量为100份时，其中无水乙醇的质量份数为10-90份。When the total mass of the absolute ethanol and butyl acetate is 100 parts, the mass parts of the absolute ethanol is 10-90 parts. 7.根据权利要求6所述的方法，其特征在于，所述的封孔剂的制备方法为：将丙烯酸树脂、纳米氧化铬、无水乙醇和乙酸丁酯进行混合，在室温-80℃的条件下搅拌4-8h，搅拌时的转速为300-1000转/min，得到封孔剂。7. method according to claim 6 is characterized in that, the preparation method of described pore sealing agent is: mix acrylic resin, nano-chromium oxide, dehydrated alcohol and butyl acetate, at room temperature-80 ℃ Under the condition of stirring for 4-8h, the rotating speed during stirring is 300-1000 rev/min to obtain the pore sealing agent. 8.根据权利要求3所述的方法，其特征在于：所述的步骤2中喷砂处理时喷砂砂粒为金刚砂，粒径为80～120目；喷砂气压控制在0.2Mpa～0.5Mpa范围。8. The method according to claim 3, characterized in that: in the step 2, the sandblasted sand particles are emery, and the particle size is 80-120 mesh; the sandblasting air pressure is controlled in the range of 0.2Mpa-0.5Mpa . 9.根据权利要求3所述的方法，其特征在于：所述的步骤3中酒精超声清洗时，清洗时间30分钟，温度控制在20～30℃，频率70Hz。9 . The method according to claim 3 , characterized in that: during the ultrasonic cleaning of alcohol in the step 3, the cleaning time is 30 minutes, the temperature is controlled at 20-30° C., and the frequency is 70 Hz. 10 . 10.根据权利要求3所述的方法，其特征在于：所述的步骤4中表面预热，温度控制在80～90℃，时间20～30min。10 . The method according to claim 3 , wherein in the step 4, the surface is preheated, the temperature is controlled at 80-90° C., and the time is 20-30 minutes. 11 . 11.一种高耐蚀复合涂层，其特征在于：其原料由陶瓷粉末和金属粉末组成，金属粉末含量为高耐蚀复合涂层粉末质量的30％，陶瓷粉末为高耐蚀复合涂层粉末质量的70％；金属粉末为镍、铬混合粉，镍粉、铬粉的质量比为1:1；陶瓷粉末为碳化铬粉；11. A high corrosion-resistant composite coating, characterized in that: its raw materials are composed of ceramic powder and metal powder, the metal powder content is 30% of the mass of the high-corrosion-resistant composite coating powder, and the ceramic powder is a high-corrosion-resistant composite coating. 70% of the powder mass; the metal powder is nickel and chromium mixed powder, and the mass ratio of nickel powder and chromium powder is 1:1; the ceramic powder is chromium carbide powder; 所述的碳化铬粉为d50＝25μm的类球形粉末；The chromium carbide powder is a spherical powder with d50=25μm; 所述的镍粉为d50＝35μm的类球形粉末；The nickel powder is spherical powder with d50=35μm; 所述的铬粉为d50＝25μm的类球形粉末。The chromium powder is a spherical powder with d50=25 μm. 12.权利要求11所述的一种高耐蚀复合涂层的制备方法，其特征在于：将碳化铬粉、镍粉、铬粉以及酒精混合均匀后球磨处理、烘干得到预制粉，酒精质量为金属陶瓷粉末质量的2.5倍；12. the preparation method of a kind of high corrosion-resistant composite coating according to claim 11, is characterized in that: ball milling treatment after mixing chromium carbide powder, nickel powder, chromium powder and alcohol uniformly, drying obtains prefabricated powder, alcohol quality 2.5 times the mass of cermet powder; 所述的球磨处理为：将高耐蚀复合涂层粉末和酒精混合均匀后，在球磨机上球磨处理18h，转速为260r/min；The ball milling treatment is as follows: after the high corrosion-resistant composite coating powder and alcohol are mixed evenly, ball milling treatment is performed on a ball mill for 18 hours, and the rotational speed is 260 r/min; 所述的烘干处理为：在烘干箱中保温30min，加热温度为80℃；The drying treatment is as follows: heat preservation in a drying box for 30 minutes, and a heating temperature of 80°C; 所述的预制粉过70目筛，随后造粒再过70目筛得到高耐蚀复合涂层材料。The prefabricated powder is passed through a 70-mesh sieve, and then granulated and passed through a 70-mesh sieve to obtain a high corrosion-resistant composite coating material. 13.权利要求11所述的一种高耐蚀复合涂层超音速等离子喷涂封孔处理方法，包括以下步骤：13. a kind of high corrosion-resistant composite coating supersonic plasma spray sealing method of claim 11, comprising the following steps: 步骤1，将液压支架立柱表面进行除油去污处理；Step 1. Degrease and decontaminate the surface of the hydraulic support column; 步骤2，对经过步骤1除油去污处理后的液压支架立柱表面进行喷砂处理；Step 2, sandblasting the surface of the hydraulic support column after the degreasing and decontamination treatment in step 1; 步骤3，对经过步骤2喷砂处理后的液压支架立柱表面进行酒精超声清洗，并烘干；Step 3, carry out alcohol ultrasonic cleaning on the surface of the hydraulic support column after sandblasting in step 2, and dry; 步骤4，对经过步骤3清洗干净后的液压支架立柱表面进行加热预热；Step 4, heating and preheating the surface of the hydraulic support column that has been cleaned in step 3; 步骤5，采用超音速等离子喷涂的方法在步骤4得到的液压支架立柱表面进行高耐蚀复合涂层的热喷涂制备；Step 5, using the method of supersonic plasma spraying to prepare the high corrosion-resistant composite coating by thermal spraying on the surface of the hydraulic support column obtained in step 4; 步骤6，对步骤5得到的液压支架立柱表面采用封孔剂来进行封孔处理，之后放入100℃烘箱中烘烤2小时，得到表面有一层高耐蚀复合涂层的液压支架立柱；In step 6, the surface of the hydraulic support column obtained in step 5 is sealed with a sealing agent, and then placed in a 100° C. oven for 2 hours to obtain a hydraulic support column with a high corrosion-resistant composite coating on the surface; 所述的步骤1中除油时采用汽油或乙醇进行冲洗或擦拭处理；In the described step 1, gasoline or ethanol is used for rinsing or wiping treatment during degreasing; 所述的步骤2中喷砂处理时喷砂砂粒为金刚砂，粒径为80目；喷砂气压控制在0.4Mpa范围；In the described step 2, during the sandblasting treatment, the sandblasted sand grains are emery, and the particle size is 80 meshes; the sandblasting air pressure is controlled within the range of 0.4Mpa; 所述的步骤3中酒精超声清洗时，清洗时间30分钟，温度控制在25℃，频率70Hz；During the alcohol ultrasonic cleaning in the step 3, the cleaning time is 30 minutes, the temperature is controlled at 25°C, and the frequency is 70Hz; 所述的步骤4中表面预热，温度控制在80℃，时间30min；In the described step 4, the surface is preheated, the temperature is controlled at 80°C, and the time is 30min; 所述的步骤5中超音速等离子喷涂时的参数为：喷涂电压为135V，喷涂电流为420A，喷涂气压为0.7MPa，喷涂距离为100mm，喷涂气源为压缩空气及Ar气，主气流量为25.4L·min-1，辅气流量Ar气流量为220L·min-1；所述高耐蚀复合涂层的厚度为200μm；The parameters during supersonic plasma spraying in the described step 5 are: the spraying voltage is 135V, the spraying current is 420A, the spraying air pressure is 0.7MPa, the spraying distance is 100mm, the spraying gas source is compressed air and Ar gas, and the main air flow is 25.4 L·min -1 , the auxiliary gas flow rate Ar is 220 L·min -1 ; the thickness of the high corrosion-resistant composite coating is 200 μm; 所述的步骤6中封孔处理方法为：将表面涂有高耐蚀复合涂层的液压支架立柱浸渍到封孔剂中或是采用纱布蘸取封孔剂擦拭高耐蚀复合涂层表面，然后将试样从封孔剂中取出后放置在干燥箱中2h烘干；The sealing treatment method in the step 6 is as follows: dipping the hydraulic support column whose surface is coated with the high corrosion-resistant composite coating into the sealing agent or wiping the surface of the high corrosion-resistant composite coating with gauze dipped in the sealing agent, Then, the sample was taken out from the sealant and placed in a drying oven for 2 hours to dry; 所述的封孔剂包括丙烯酸树脂、纳米氧化铬、无水乙醇和乙酸丁酯，以无水乙醇和乙酸丁酯的总质量为100份计算，丙烯酸树脂的质量份数为2份，纳米氧化铬的质量份数为1份；The pore sealing agent includes acrylic resin, nano-chromium oxide, absolute ethanol and butyl acetate. Calculated based on the total mass of absolute ethanol and butyl acetate being 100 parts, the mass fraction of acrylic resin is 2 parts, and the nano-oxidation resin is 2 parts by mass. The mass fraction of chromium is 1 part; 所述的无水乙醇和乙酸丁酯的总质量为100份时，其中无水乙醇的质量份数为80份；When the total mass of described absolute ethanol and butyl acetate was 100 parts, wherein the mass fraction of absolute ethanol was 80 parts; 所述的封孔剂的制备方法为：将丙烯酸树脂、纳米氧化铬、无水乙醇和乙酸丁酯进行混合，在室温条件下搅拌6h，搅拌时的转速为400转/min，得到封孔剂。The preparation method of the sealing agent is as follows: mixing acrylic resin, nano-chromium oxide, absolute ethanol and butyl acetate, stirring at room temperature for 6 hours, and the rotating speed during stirring is 400 rev/min to obtain the sealing agent .
CN202111280351.9A 2021-11-01 2021-11-01 High-corrosion-resistance composite coating, preparation and supersonic plasma spraying hole sealing treatment method Pending CN113981357A (en)

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CN120866900A (en) * 2025-06-20 2025-10-31 西安重装铜川煤矿机械有限公司 Hydraulic support surface treatment process

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