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CN111018505A - Ceramic identification coating suitable for metal substrate and preparation method thereof - Google Patents

Ceramic identification coating suitable for metal substrate and preparation method thereof Download PDF

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Publication number
CN111018505A
CN111018505A CN201911387514.6A CN201911387514A CN111018505A CN 111018505 A CN111018505 A CN 111018505A CN 201911387514 A CN201911387514 A CN 201911387514A CN 111018505 A CN111018505 A CN 111018505A
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China
Prior art keywords
parts
oxide
coating
base layer
surface layer
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CN201911387514.6A
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Chinese (zh)
Inventor
孙洪飞
李和发
雒晓涛
金军
祝显伟
马强
全亮
毕明胤
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Rsi Asia New Energy Technology Shanghai Co ltd
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Rsi Asia New Energy Technology Shanghai Co ltd
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Priority to CN201911387514.6A priority Critical patent/CN111018505A/en
Publication of CN111018505A publication Critical patent/CN111018505A/en
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Abstract

The invention provides a ceramic identification coating suitable for a metal base material and a preparation method thereof. The ceramic identification coating is composed of a base layer and a surface layer. The base layer is also called as an identification layer and is white, the thickness of the base layer is 0.10-0.15 mm, the surface layer is green, the thickness of the surface layer is 0.10-0.15 mm, the color difference between the surface layer and the base layer is obvious, and the identification degree is high. When the ceramic identification coating is used, if the surface layer is sprayed again on the part which leaks out of the base layer, the surface coating can be directly sprayed on the part which exposes out of the white base layer after floating ash on the heating surface is blown and washed clean by high-pressure air or high-pressure water without sand blasting. The ceramic identification coating claimed by the invention has the functions of resisting high-temperature corrosion and dirt and coking, improving the heat exchange efficiency, effectively prolonging the service life of a base material, obviously reducing the manpower and economic cost of subsequent maintenance and realizing long-life-cycle protection of a heated surface.

Description

Ceramic identification coating suitable for metal substrate and preparation method thereof
Technical Field
The invention relates to a ceramic identification coating which is suitable for metal base materials, in particular to metal base materials in a power plant boiler, and specifically provides a ceramic identification coating which is composed of a base layer and a surface layer, wherein the base layer is white, and the surface layer is green.
Background
In the prior art, the coatings on the heating surface and the fire side surface of the high-temperature radiation metal base material of power plant boilers, industrial boilers and kilns in the industries of electric power, petroleum, petrochemical industry, metallurgy and the like have the defects of poor contamination and coking resistance, high-temperature corrosion resistance and flow rate abrasion resistance. Single layer, single color, and high later maintenance cost. The sand blasting which is repeated throughout the year influences the service life of the base material, and the severe construction environment and the high-altitude operation in the furnace cause adverse effects on the physical and psychological health of constructors.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a ceramic identification coating suitable for metal substrates, which can effectively prolong the service life of the substrate, significantly reduce the labor and economic cost of subsequent maintenance, and realize long-life protection of the heated surface.
In order to achieve the above objects and other related objects, the present invention provides a method for preparing a ceramic identification coating suitable for a metal substrate, wherein the ceramic identification coating is composed of a base layer and a surface layer, the base layer is white and has a thickness of 0.10 to 0.15mm, the surface layer is green and has a thickness of 0.10 to 0.15 mm; the coating forming the base layer comprises lanthanum oxide, dysprosium oxide, cerium oxide, boron nitride, aluminum oxide, zirconium dioxide, aluminum silicate, high-temperature binder, bentonite, clay, brown fused alumina, cordierite and dispersing agent; the coating forming the surface layer comprises lanthanum oxide, cerium oxide, yttrium oxide, boron nitride, aluminum oxide, chromium oxide, zirconium dioxide, copper oxide, aluminum silicate, high-temperature binder, bentonite, clay, brown alumina, cordierite, colorant and dispersant; the production method of the ceramic identification coating comprises the following steps: respectively stirring the paint forming the base layer and the paint forming the surface layer for 15 minutes, adding water, stirring for 30 minutes, then placing in a closed manner, fully mixing to obtain base layer paint slurry and surface layer paint slurry, then coating the base layer paint slurry inside a boiler by adopting a coating method, and obtaining the base layer after 24 hours at normal temperature; and then, spraying the surface layer coating slurry on the surface of the base layer by adopting a spraying method, and obtaining the ceramic identification coating after 48 hours at normal temperature.
The grain diameter of lanthanum oxide, dysprosium oxide, cerium oxide, yttrium oxide, boron nitride, aluminum oxide, chromium oxide and zirconium dioxide in the coating components is 100-300 nanometers.
The coating forming the base layer comprises, by weight, 1-5 parts of lanthanum oxide, 1-5 parts of dysprosium oxide, 1-5 parts of cerium oxide, 5-20 parts of boron nitride, 5-10 parts of aluminum oxide, 5-10 parts of zirconium dioxide, 10-15 parts of aluminum silicate, 2-6 parts of a high-temperature binder, 2-8 parts of bentonite, 3-9 parts of clay, 5-10 parts of brown corundum, 5-20 parts of cordierite and 0.10-0.30 part of a dispersing agent; the coating forming the surface layer comprises, by weight, 1-5 parts of lanthanum oxide, 1-5 parts of cerium oxide, 1-5 parts of yttrium oxide, 5-20 parts of boron nitride, 5-10 parts of aluminum oxide, 5-10 parts of chromium oxide, 5-10 parts of zirconium dioxide, 1-2 parts of copper oxide, 10-15 parts of aluminum silicate, 2-6 parts of a high-temperature binder, 2-8 parts of bentonite, 3-9 parts of clay, 5-10 parts of brown fused alumina, 5-20 parts of cordierite, 0.05-0.09 part of a colorant and 0.10-0.30 part of a dispersant.
Preferably, the base coating comprises the following components, by weight, 4 parts of lanthanum oxide, 4 parts of dysprosium oxide, 4 parts of cerium oxide, 15 parts of boron nitride, 10 parts of aluminum oxide, 7 parts of zirconium dioxide, 15 parts of aluminum silicate, 2.8 parts of a high-temperature binder, 5 parts of bentonite, 6 parts of clay, 8 parts of brown corundum, 10 parts of cordierite and 0.2 part of a dispersing agent. The surface coating comprises the following components, by weight, 4 parts of lanthanum oxide, 4 parts of cerium oxide, 4 parts of yttrium oxide, 15 parts of boron nitride, 10 parts of aluminum oxide, 9 parts of chromium oxide, 7 parts of zirconium dioxide, 1 part of copper oxide, 15 parts of aluminum silicate, 2.8 parts of a high-temperature binder, 5 parts of bentonite, 6 parts of clay, 8 parts of brown corundum, 10 parts of cordierite, 0.07 part of a colorant and 0.2 part of a dispersant.
The ceramic identification coating is particularly suitable for metal base materials in a boiler of a power plant, when the boiler operates for a certain time, the boiler is shut down for inspection, floating ash on a heating surface is blown and washed clean by high-pressure air or water, if a white base layer is exposed, sand blasting is not carried out, and surface coating is directly sprayed on the part where the white base layer is exposed.
The invention also provides a ceramic identification coating prepared by the preparation method of the ceramic identification coating suitable for the metal substrate.
As described above, the ceramic identification coating suitable for the metal substrate and the preparation method thereof of the present invention have the following beneficial effects: the color difference between the surface layer and the base layer is obvious, the identification degree is high, the hidden dangers such as coking, coating falling and the like can be conveniently found in time, sand blasting is not needed, and the coating on the surface layer can be directly sprayed and repaired; the ceramic identification coating is made of nano-grade raw materials, and the obtained ceramic identification coating is a nano-ceramic coating which has strong capabilities of resisting contamination, coking, high-temperature corrosion and flowing speed and abrasion; in addition, the ceramic identification coating suitable for the metal base material can effectively prolong the service life of the base material, obviously reduce the manpower and economic cost of subsequent maintenance and realize long life cycle protection of the heated surface.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Implementation mode one
A preparation method of a ceramic identification coating suitable for a power plant boiler comprises the following steps of forming the ceramic identification coating by a base layer and a surface layer, wherein the base layer is white and 0.10mm in thickness, and the surface layer is green and 0.10mm in thickness; the coating forming the base layer comprises 1kg of lanthanum oxide, 1kg of dysprosium oxide, 1kg of cerium oxide, 5kg of boron nitride, 5kg of alumina, 5kg of zirconium dioxide, 10kg of aluminum silicate, 2kg of high-temperature binder, 2kg of bentonite, 3kg of clay, 5kg of brown fused alumina, 5kg of cordierite and 0.10kg of dispersant; the coating forming the surface layer comprises 1kg of lanthanum oxide, 1kg of cerium oxide, 1kg of yttrium oxide, 5kg of boron nitride, 5kg of aluminum oxide, 5kg of chromium oxide, 5kg of zirconium dioxide, 1kg of copper oxide, 10kg of aluminum silicate, 2kg of high-temperature binder, 2kg of bentonite, 3kg of clay, 5kg of brown fused alumina, 5kg of cordierite, 0.05kg of colorant and 0.10kg of dispersant;
the production method of the ceramic identification coating comprises the following steps: respectively mixing and stirring the paint forming the base layer and the paint forming the surface layer for 15 minutes, adding water, stirring for 30 minutes, then placing in a closed manner to be fully mixed to obtain base layer paint slurry and surface layer paint slurry, then coating the base layer paint slurry inside a boiler by adopting a coating method, and obtaining the base layer after 24 hours at normal temperature; and then, spraying the surface layer coating slurry on the surface of the base layer by adopting a spraying method, and obtaining the ceramic identification coating after 48 hours at normal temperature.
The grain diameter of lanthanum oxide, dysprosium oxide, cerium oxide, yttrium oxide, boron nitride, aluminum oxide, chromium oxide and zirconium dioxide in the coating components is 100 nanometers.
Second embodiment
A preparation method of a ceramic identification coating suitable for a power plant boiler comprises the following steps of forming the ceramic identification coating by a base layer and a surface layer, wherein the base layer is white and 0.10mm in thickness, and the surface layer is green and 0.15mm in thickness; the coating components for forming the base layer comprise 1kg of lanthanum oxide, 1kg of dysprosium oxide, 1kg of cerium oxide, 5kg of boron nitride, 5kg of alumina, 5kg of zirconium dioxide, 10kg of aluminum silicate, 2kg of high-temperature binder, 2kg of bentonite, 3kg of clay, 5kg of brown fused alumina, 5kg of cordierite and 0.10kg of dispersing agent;
the components of the coating forming the surface layer comprise 5kg of lanthanum oxide, 5kg of cerium oxide, 5kg of yttrium oxide, 20kg of boron nitride, 10kg of aluminum oxide, 10kg of chromium oxide, 10kg of zirconium dioxide, 2kg of copper oxide, 15kg of aluminum silicate, 6kg of high-temperature binder, 8kg of bentonite, 9kg of clay, 10kg of brown corundum, 20kg of cordierite, 0.09kg of colorant and 0.30kg of dispersant;
the production method of the ceramic identification coating comprises the following steps: respectively stirring the paint forming the base layer and the paint forming the surface layer for 15 minutes, adding water, stirring for 30 minutes, then placing in a closed manner, fully mixing to obtain base layer paint slurry and surface layer paint slurry, then coating the base layer paint slurry inside a boiler by adopting a coating method, and obtaining the base layer after 24 hours at normal temperature; and then, spraying the surface layer coating slurry on the surface of the base layer by adopting a spraying method, and obtaining the ceramic identification coating after 48 hours at normal temperature.
The grain diameter of lanthanum oxide, dysprosium oxide, cerium oxide, yttrium oxide, boron nitride, aluminum oxide, chromium oxide and zirconium dioxide in the coating components is 300 nanometers.
Third embodiment
A preparation method of a ceramic identification coating suitable for a power plant boiler comprises the following steps of forming the ceramic identification coating by a base layer and a surface layer, wherein the base layer is white and 0.10mm in thickness, and the surface layer is green and 0.10mm in thickness; the coating components for forming the base layer comprise 4kg of lanthanum oxide, 4kg of dysprosium oxide, 4kg of cerium oxide, 15kg of boron nitride, 10kg of alumina, 7kg of zirconium dioxide, 15kg of aluminum silicate, 2.8kg of high-temperature binder, 5kg of bentonite, 6kg of clay, 8kg of brown corundum, 10kg of cordierite and 0.2kg of dispersing agent, and the coating components for forming the surface layer comprise: 4kg of lanthanum oxide, 4kg of cerium oxide, 4kg of yttrium oxide, 15kg of boron nitride, 10kg of aluminum oxide, 9kg of chromium oxide, 7kg of zirconium dioxide, 1kg of copper oxide, 15kg of aluminum silicate, 2.8kg of high-temperature binder, 5kg of bentonite, 6kg of clay, 8kg of brown corundum, 10kg of cordierite, 0.07kg of colorant and 0.2kg of dispersant.
The other steps are the same as those in the first embodiment.
Embodiment IV
When a certain power plant boiler adopts the ceramic identification coating of the first embodiment, when the boiler runs for 2400 hours, the boiler is shut down for inspection, and after floating ash on a heating surface is swept and washed clean by high-pressure air or water, a white base layer is not exposed, which indicates that the ceramic identification coating is not damaged, and the boiler continues to run; when the boiler operates for 4800h, the boiler is shut down for inspection, a white base layer is found to be exposed after the boiler is washed by high-pressure water, sand blasting is not carried out, and surface layer coating is directly sprayed on the part where the white base layer is exposed.
In conclusion, the ceramic identification coating can effectively prolong the service life of the boiler, remarkably reduce the manpower and economic cost of subsequent maintenance and realize long-life-cycle protection of the heated surface. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (6)

1. The preparation method of the ceramic identification coating suitable for the metal substrate is characterized in that the ceramic identification coating consists of a base layer and a surface layer, wherein the base layer is white and has the thickness of 0.10-0.15 mm, and the surface layer is green and has the thickness of 0.10-0.15 mm;
the coating forming the base layer comprises lanthanum oxide, dysprosium oxide, cerium oxide, boron nitride, aluminum oxide, zirconium dioxide, aluminum silicate, high-temperature binder, bentonite, clay, brown fused alumina, cordierite and dispersing agent; the coating forming the surface layer comprises lanthanum oxide, cerium oxide, yttrium oxide, boron nitride, aluminum oxide, chromium oxide, zirconium dioxide, copper oxide, aluminum silicate, high-temperature binder, bentonite, clay, brown alumina, cordierite, colorant and dispersant;
the production method of the ceramic identification coating comprises the following steps: respectively mixing and stirring the paint forming the base layer and the paint forming the surface layer for 15 minutes, adding water, stirring for 30 minutes, then hermetically placing for fully mixing to obtain base layer paint slurry and surface layer paint slurry respectively, then coating the base layer paint slurry inside a boiler by adopting a coating method, and obtaining the base layer after 24 hours at normal temperature; and then, spraying the surface layer coating slurry on the surface of the base layer by adopting a spraying method, and obtaining the ceramic identification coating after 48 hours at normal temperature.
2. The method of claim 1 for preparing a ceramic identification coating suitable for use on a metal substrate, wherein: the grain diameter of lanthanum oxide, dysprosium oxide, cerium oxide, yttrium oxide, boron nitride, aluminum oxide, chromium oxide and zirconium dioxide in the coating components is 100-300 nanometers.
3. The method of preparing a ceramic identification coating for a metal substrate of claim 2, wherein: the coating forming the base layer comprises, by weight, 1-5 parts of lanthanum oxide, 1-5 parts of dysprosium oxide, 1-5 parts of cerium oxide, 5-20 parts of boron nitride, 5-10 parts of aluminum oxide, 5-10 parts of zirconium dioxide, 10-15 parts of aluminum silicate, 2-6 parts of a high-temperature binder, 2-8 parts of bentonite, 3-9 parts of clay, 5-10 parts of brown corundum, 5-20 parts of cordierite and 0.10-0.30 part of a dispersing agent; the coating forming the surface layer comprises, by weight, 1-5 parts of lanthanum oxide, 1-5 parts of cerium oxide, 1-5 parts of yttrium oxide, 5-20 parts of boron nitride, 5-10 parts of aluminum oxide, 5-10 parts of chromium oxide, 5-10 parts of zirconium dioxide, 1-2 parts of copper oxide, 10-15 parts of aluminum silicate, 2-6 parts of a high-temperature binder, 2-8 parts of bentonite, 3-9 parts of clay, 5-10 parts of brown fused alumina, 5-20 parts of cordierite, 0.05-0.09 part of a colorant and 0.10-0.30 part of a dispersant.
4. A method of preparing a ceramic identification coating suitable for use on a metal substrate according to any of claims 1 to 3, characterized in that: the coating of the base layer comprises the following components in parts by weight: 4 parts of lanthanum oxide, 4 parts of dysprosium oxide, 4 parts of cerium oxide, 15 parts of boron nitride, 10 parts of aluminum oxide, 7 parts of zirconium dioxide, 15 parts of aluminum silicate, 2.8 parts of high-temperature binder, 5 parts of bentonite, 6 parts of clay, 8 parts of brown corundum, 10 parts of cordierite and 0.2 part of dispersant, wherein the coating on the surface layer comprises the following components in parts by weight: 4 parts of lanthanum oxide, 4 parts of cerium oxide, 4 parts of yttrium oxide, 15 parts of boron nitride, 10 parts of aluminum oxide, 9 parts of chromium oxide, 7 parts of zirconium dioxide, 1 part of copper oxide, 15 parts of aluminum silicate, 2.8 parts of high-temperature binder, 5 parts of bentonite, 6 parts of clay, 8 parts of brown corundum, 10 parts of cordierite, 0.07 part of colorant and 0.2 part of dispersant.
5. The method of preparing a ceramic identification coating suitable for use on a metal substrate according to any of claims 1 to 4, wherein: the ceramic identification coating is suitable for metal base materials in a boiler of a power plant, when the boiler operates for a certain time, the boiler is shut down for inspection, floating ash on a heating surface is blown and washed clean by high-pressure air or water, if a white base layer is exposed, sand blasting is not carried out, and surface coating is directly sprayed on the part where the white base layer is exposed.
6. A ceramic identification coating produced by the method of any one of claims 1 to 5 for producing a ceramic identification coating suitable for use on a metal substrate.
CN201911387514.6A 2019-12-27 2019-12-27 Ceramic identification coating suitable for metal substrate and preparation method thereof Pending CN111018505A (en)

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CN118599422A (en) * 2024-05-31 2024-09-06 河北建投能源科学技术研究院有限公司 A protective identification coating for boiler induced draft fan blades and its application

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