CN120041051B - Corrosion-resistant copper rod and preparation method thereof - Google Patents
Corrosion-resistant copper rod and preparation method thereofInfo
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- CN120041051B CN120041051B CN202510320927.1A CN202510320927A CN120041051B CN 120041051 B CN120041051 B CN 120041051B CN 202510320927 A CN202510320927 A CN 202510320927A CN 120041051 B CN120041051 B CN 120041051B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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Abstract
本申请涉及金属涂层技术领域，具体公开了一种耐腐蚀铜杆及其制备方法。一种耐腐蚀铜杆的制备方法，包括以下步骤：将耐腐蚀涂层液涂覆在铜杆表面，进行加热固化处理，在铜杆表面形成耐腐蚀薄膜；所述耐腐蚀涂层液，包括以下重量份原料：100‑200份环氧树脂、30‑50份改性聚硅氮烷、5‑10份碘化物离子液体、5‑10份硼化钼、1‑5份硅烷偶联剂、1‑5份分散剂、5‑10份固化剂、20‑40份溶剂；所得铜杆的耐腐蚀显著，延长铜杆的使用寿命，具有广阔的市场前景。The present application relates to the field of metal coating technology, specifically disclosing a corrosion-resistant copper rod and a method for preparing the same. The method comprises the following steps: applying a corrosion-resistant coating liquid to the surface of the copper rod, performing a heat curing treatment, and forming a corrosion-resistant film on the surface of the copper rod; the corrosion-resistant coating liquid comprises the following raw materials in parts by weight: 100-200 parts of epoxy resin, 30-50 parts of modified polysilazane, 5-10 parts of iodide ionic liquid, 5-10 parts of molybdenum boride, 1-5 parts of silane coupling agent, 1-5 parts of dispersant, 5-10 parts of curing agent, and 20-40 parts of solvent; the resulting copper rod exhibits significant corrosion resistance, extends its service life, and has broad market prospects.
Description
Technical Field
The application relates to the technical field of metal coatings, in particular to a corrosion-resistant copper rod and a preparation method thereof.
Background
Copper rods are widely used in a number of critical fields such as power transmission, electronic and electrical appliance manufacturing, construction wiring, and the like, by virtue of their excellent electrical conductivity, good thermal conductivity, and excellent workability. In the power transmission network, a large number of copper rods are used as core conductors of wires and cables to bear the heavy duty of current transmission, and in the electronic and electric products, precise parts made of the copper rods ensure the stable operation of the equipment.
However, copper rods present significant corrosion resistance challenges during actual use. Under natural environment, moisture, oxygen and various corrosive gases such as sulfur dioxide, hydrogen sulfide and the like in the air can continuously erode the surface of the copper rod, so that oxidation reaction can occur to generate patina. In some special industrial environments, such as chemical production workshops, the copper rod is also subjected to direct attack by strong corrosive media such as acid and alkali, so that defects such as corrosion pits and rust spots on the surface of the copper rod are caused, the appearance of the copper rod is seriously affected, the internal structure of the copper rod is further damaged, the conductivity of the copper rod is obviously reduced, and the resistance is greatly increased. This not only causes a significant energy loss during power transmission, but may also cause electrical failures and even jeopardize the safe operation of the whole system.
In order to solve the problem of poor corrosion resistance of the copper rod, metal plating technology such as zinc plating and nickel plating is commonly adopted at present, and although the corrosion resistance of the copper rod can be improved to a certain extent, the binding force between the plating layer and the copper rod is limited, and when the copper rod is used for a long time or impacted by external force, the plating layer is easy to peel off, so that the protection effect is lost. Meanwhile, some conventional coating technologies can form a protective layer on the surface of a copper rod, but the protective effect is often unsatisfactory when facing a complex corrosion environment, and the strict requirements of the modern industry on high durability and stability of materials are difficult to meet.
Therefore, the application provides a corrosion-resistant copper rod and a preparation method thereof.
Disclosure of Invention
The application provides a corrosion-resistant copper rod and a preparation method thereof, aiming at solving the problem of poor corrosion resistance of the existing copper rod.
In a first aspect, the application provides a method for preparing a corrosion-resistant copper rod, which adopts the following technical scheme:
the preparation method of the corrosion-resistant copper rod comprises the following steps:
coating the corrosion-resistant coating liquid on the surface of a copper rod, and performing heating and curing treatment to form a corrosion-resistant film on the surface of the copper rod;
The corrosion-resistant coating liquid comprises, by weight, 100-200 parts of epoxy resin, 30-50 parts of modified polysilazane, 5-10 parts of iodide ionic liquid, 5-10 parts of molybdenum boride, 1-5 parts of a silane coupling agent, 1-5 parts of a dispersing agent, 5-10 parts of a curing agent and 20-40 parts of a solvent.
Preferably, the preparation method of the modified polysilazane comprises the following steps:
s1, adding 2-benzothiazole-2-oxyacetic acid and hydroxyethyl ethylenediamine into dimethylbenzene, carrying out acylation dehydration reaction for 4-6 hours at 130-145 ℃, carrying out intramolecular dehydration reaction for 2-4 hours at 200-220 ℃ until no water is generated, and carrying out reduced pressure distillation to obtain an intermediate;
S2, adding perhydro polysilazane into anhydrous tetrahydrofuran, stirring uniformly, adding an intermediate and dibutyl tin dilaurate, raising the temperature to 50-60 ℃, reacting for 6-8 hours under the protection of inert gas, and removing the solvent by rotary evaporation after the reaction is finished to obtain the modified polysilazane.
Preferably, the ratio of the amount of 2-benzothiazole-2-oxyacetic acid, hydroxyethyl ethylenediamine to xylene used in step S1 is (23-30) g (11-15) g (100-200) mL.
Preferably, the ratio of the dosage of the perhydro polysilazane, the intermediate, the dibutyl tin dilaurate and the anhydrous tetrahydrofuran in the step S1 is (15-20) g (20-30) g (1-2) g (100-200) mL.
Preferably, the iodide ion liquid is 1, 3-dimethyl imidazole iodide and/or 1-ethyl-3-methyl imidazole iodide.
Preferably, the silane coupling agent is at least one of vinyl triethoxysilane, gamma-glycidyl ether oxypropyl methyl diethoxysilane, KH-550 and KH-560.
Preferably, the dispersing agent is at least one of laureth, cetostearyl alcohol polyoxyethylene ether, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, sodium stearate and triethylhexyl phosphoric acid.
Preferably, the curing agent is at least one of diethylenetriamine, dimethylethanolamine, 1, 3-diaminocyclohexane, m-phenylenediamine and 4,4' -diaminodiphenyl sulfone.
Preferably, the solvent is at least one of toluene, petroleum ether, xylene, tetrahydrofuran and ethyl acetate.
Preferably, the preparation method of the corrosion-resistant coating liquid comprises the following steps:
according to the formula, adding epoxy resin, modified polysilazane, iodide ion liquid, molybdenum boride, a silane coupling agent, a dispersing agent and a curing agent into a solvent, and uniformly mixing to obtain the corrosion-resistant coating liquid.
In a second aspect, the application provides a corrosion-resistant copper rod, which adopts the following technical scheme:
the corrosion-resistant copper rod is prepared by the preparation method.
In summary, the application has the following beneficial effects:
1. The corrosion-resistant film on the surface of the copper rod is formed by heating and curing corrosion-resistant coating liquid, wherein the corrosion-resistant coating liquid comprises epoxy resin, modified polysilazane, iodide ion liquid, molybdenum boride, a silane coupling agent, a dispersing agent, a curing agent and a solvent, and the components interact and have synergistic effects. The film can not only effectively resist the erosion of various corrosive mediums and prolong the service life of the copper rod, but also improve the reliability and stability of the copper rod in different environments, and provides powerful guarantee for the application in the fields of electric power, electronics and the like.
2. The carboxyl in the 2-benzothiazole-2-oxyacetic acid and the amino in the hydroxyethyl ethylenediamine undergo an acylation reaction and intramolecular dehydration reaction to generate an imidazoline ring, thus obtaining an intermediate; the modified polysilazane disclosed by the application organically combines the perhydro polysilazane with benzothiazole rings and imidazoline rings, the arrangement mode of molecular chains of the polysilazane can be changed, the stacking among the molecular chains is more compact, a more compact structure is formed, the penetration of a corrosion medium is effectively blocked, the contact between the corrosion medium and the surface of a copper rod is reduced, the corrosion resistance of the copper rod is improved, and the introduction of a benzothiazole ring and an imidazoline ring is also beneficial to improving the mechanical damage resistance of the polysilazane, so that the corrosion resistance of the copper rod can not be kept to be continuous, and the corrosion resistance of the copper rod can be kept to be continuous, and the coating can not be used for protecting the outside.
3. The iodide ion liquid provided by the application can form chemical bonds with copper atoms on the surface of a copper rod, so that electron cloud distribution on the surface of the copper rod is changed, the coordination bond strength between the surface of the copper rod and hetero atoms in modified polysilazane molecules is enhanced, the adsorption capacity of the modified polysilazane on the surface of the copper rod is enhanced, the corrosion inhibition efficiency is improved, and imidazole rings contained in iodide ion liquid cations also have corrosion inhibition effects, therefore, the iodide ion liquid provided by the application can promote the formation of a more uniform and more compact protective film on the surface of metal, and the synergistic modified polysilazane can play a role in corrosion inhibition better.
4. In the preparation process of the corrosion-resistant copper rod, the method controls various process parameters, promotes interaction among various components, further improves the corrosion resistance of the copper rod, has simple steps and low cost, and is suitable for industrial production.
Detailed Description
The present application will be described in further detail with reference to examples.
Examples 1-5 provide a method of making a corrosion resistant copper rod.
Example 1:
the preparation method of the corrosion-resistant copper rod comprises the following steps:
step (1) preparation of modified polysilazane
S1, adding 23g of 2-benzothiazole-2-oxyacetic acid and 11g of hydroxyethyl ethylenediamine into 100mL of dimethylbenzene, carrying out acylation dehydration reaction for 6h at 130 ℃, carrying out intramolecular dehydration reaction for 4h at 200 ℃ until no water is generated, and carrying out reduced pressure distillation to obtain an intermediate;
S2, adding 15g of perhydro polysilazane into 100mL of anhydrous tetrahydrofuran, uniformly stirring, adding 20g of intermediate and 1g of dibutyltin dilaurate, raising the temperature to 50 ℃, reacting for 8 hours under the protection of inert gas, and removing the solvent by rotary evaporation after the reaction is finished to obtain the modified polysilazane;
step (2) preparing corrosion-resistant coating liquid
According to the formula, adding 100 parts of epoxy resin, 30 parts of modified polysilazane, 5 parts of iodide ionic liquid, 5 parts of molybdenum boride, 1 part of silane coupling agent, 1 part of dispersing agent and 5 parts of curing agent into 20 parts of solvent, and uniformly mixing to obtain corrosion-resistant coating liquid;
wherein the epoxy resin is E-44, the iodide ionic liquid is iodinated 1, 3-dimethyl imidazole, the silane coupling agent is KH-550, the dispersing agent is laurinol polyoxyethylene ether, the curing agent is diethylenetriamine, and the solvent is toluene;
Step (3) preparing a corrosion-resistant copper rod
And (3) coating the corrosion-resistant coating liquid on the surface of the copper rod, and performing heating and curing treatment for 4 hours at the temperature of 80 ℃ to form a corrosion-resistant film on the surface of the copper rod so as to obtain the corrosion-resistant copper rod.
Example 2:
the preparation method of the corrosion-resistant copper rod comprises the following steps:
step (1) preparation of modified polysilazane
S1, adding 25g of 2-benzothiazole-2-oxyacetic acid and 13g of hydroxyethyl ethylenediamine into 120mL of dimethylbenzene, carrying out acylation dehydration reaction for 5.5h at 135 ℃, carrying out intramolecular dehydration reaction for 3.5h at 205 ℃ until no water is generated, and carrying out reduced pressure distillation to obtain an intermediate;
S2, adding 16g of perhydro polysilazane (CAS No. 122174-44-1) into 120mL of anhydrous tetrahydrofuran, uniformly stirring, adding 22g of intermediate and 1.2g of dibutyltin dilaurate, raising the temperature to 52 ℃, reacting for 7.5h under the protection of inert gas, and removing the solvent by rotary evaporation after the reaction is finished to obtain modified polysilazane;
step (2) preparing corrosion-resistant coating liquid
According to the formula, adding 120 parts of epoxy resin, 35 parts of modified polysilazane, 6 parts of iodide ionic liquid, 6 parts of molybdenum boride, 2 parts of silane coupling agent, 2 parts of dispersing agent and 6 parts of curing agent into 25 parts of solvent, and uniformly mixing to obtain corrosion-resistant coating liquid;
Wherein the epoxy resin is E-44, the iodide ionic liquid is iodinated 1-ethyl-3-methylimidazole, the silane coupling agent is KH-560, the dispersing agent is sodium dodecyl benzene sulfonate, the curing agent is dimethylethanolamine, and the solvent is dimethylbenzene;
Step (3) preparing a corrosion-resistant copper rod
And (3) coating the corrosion-resistant coating liquid on the surface of the copper rod, and then heating and curing for 3.5 hours at the temperature of 85 ℃ to form a corrosion-resistant film on the surface of the copper rod, thereby obtaining the corrosion-resistant copper rod.
Example 3:
the preparation method of the corrosion-resistant copper rod comprises the following steps:
step (1) preparation of modified polysilazane
S1, adding 25g of 2-benzothiazole-2-oxyacetic acid and 13g of hydroxyethyl ethylenediamine into 150mL of dimethylbenzene, carrying out acylation dehydration reaction for 5h at 138 ℃, carrying out intramolecular dehydration reaction for 3h at 210 ℃ until no water is generated, and carrying out reduced pressure distillation to obtain an intermediate;
s2, adding 18g of perhydro polysilazane (CAS No. 122174-44-1) into 150mL of anhydrous tetrahydrofuran, uniformly stirring, adding 25g of intermediate and 1.5g of dibutyltin dilaurate, raising the temperature to 55 ℃, reacting for 7h under the protection of inert gas, and removing the solvent by rotary evaporation after the reaction is finished to obtain modified polysilazane;
step (2) preparing corrosion-resistant coating liquid
According to the formula, 150 parts of epoxy resin, 40 parts of modified polysilazane, 7.5 parts of iodide ionic liquid, 8 parts of molybdenum boride, 3 parts of silane coupling agent, 3 parts of dispersing agent and 8 parts of curing agent are added into 30 parts of solvent, and the mixture is uniformly mixed to obtain corrosion-resistant coating liquid;
the epoxy resin is E-44, the iodide ionic liquid is prepared by mixing iodized 1, 3-dimethyl imidazole and iodized 1-ethyl-3-methyl imidazole according to the mass ratio of 1:1, the silane coupling agent is gamma-glycidyl ether oxypropyl methyl diethoxy silane, the dispersing agent is sodium dodecyl sulfate, the curing agent is 1, 3-diaminocyclohexane, and the solvent is tetrahydrofuran;
Step (3) preparing a corrosion-resistant copper rod
And (3) coating the corrosion-resistant coating liquid on the surface of the copper rod, and then heating and curing for 3 hours at the temperature of 90 ℃ to form a corrosion-resistant film on the surface of the copper rod, thereby obtaining the corrosion-resistant copper rod.
Example 4:
the preparation method of the corrosion-resistant copper rod comprises the following steps:
step (1) preparation of modified polysilazane
S1, adding 28g of 2-benzothiazole-2-oxyacetic acid and 14g of hydroxyethyl ethylenediamine into 180mL of dimethylbenzene, carrying out acylation dehydration reaction for 4.5 hours at 140 ℃, carrying out intramolecular dehydration reaction for 2.5 hours at 215 ℃ until no water is generated, and carrying out reduced pressure distillation to obtain an intermediate;
S2, adding 18g of perhydro polysilazane (CAS No. 122174-44-1) into 180mL of anhydrous tetrahydrofuran, uniformly stirring, adding 28g of intermediate and 1.8g of dibutyltin dilaurate, raising the temperature to 58 ℃, reacting for 6.5h under the protection of inert gas, and removing the solvent by rotary evaporation after the reaction is finished to obtain modified polysilazane;
step (2) preparing corrosion-resistant coating liquid
According to the formula, 180 parts of epoxy resin, 45 parts of modified polysilazane, 9 parts of iodide ionic liquid, 8 parts of molybdenum boride, 4 parts of silane coupling agent, 4 parts of dispersing agent and 8 parts of curing agent are added into 35 parts of solvent, and the mixture is uniformly mixed to obtain corrosion-resistant coating liquid;
The epoxy resin is E-44, the iodide ionic liquid is iodized 1, 3-dimethyl imidazole, the silane coupling agent is vinyl triethoxysilane, the dispersing agent is sodium stearate, the curing agent is m-phenylenediamine, and the solvent is ethyl acetate;
Step (3) preparing a corrosion-resistant copper rod
And (3) coating the corrosion-resistant coating liquid on the surface of the copper rod, and then heating and curing for 3.5 hours at the temperature of 95 ℃ to form a corrosion-resistant film on the surface of the copper rod, thereby obtaining the corrosion-resistant copper rod.
Example 5:
the preparation method of the corrosion-resistant copper rod comprises the following steps:
step (1) preparation of modified polysilazane
S1, adding 30g of 2-benzothiazole-2-oxyacetic acid and 15g of hydroxyethyl ethylenediamine into 200mL of dimethylbenzene, carrying out acylation dehydration reaction for 4h at 145 ℃, carrying out intramolecular dehydration reaction for 2h at 220 ℃ until no water is generated, and carrying out reduced pressure distillation to obtain an intermediate;
S2, adding 20g of perhydro polysilazane (CAS No. 122174-44-1) into 200mL of anhydrous tetrahydrofuran, uniformly stirring, adding 30g of intermediate and 2g of dibutyltin dilaurate, raising the temperature to 60 ℃, reacting for 6 hours under the protection of inert gas, and removing the solvent by rotary evaporation after the reaction is finished to obtain modified polysilazane;
step (2) preparing corrosion-resistant coating liquid
According to the formula, adding 200 parts of epoxy resin, 50 parts of modified polysilazane, 10 parts of iodide ionic liquid, 10 parts of molybdenum boride, 5 parts of silane coupling agent, 5 parts of dispersing agent and 10 parts of curing agent into 40 parts of solvent, and uniformly mixing to obtain corrosion-resistant coating liquid;
Wherein the epoxy resin is E-44, the iodide ionic liquid is iodinated 1-ethyl-3-methylimidazole, the silane coupling agent is KH-560, the dispersing agent is triethylhexyl phosphoric acid, the curing agent is 4,4' -diaminodiphenyl sulfone, and toluene and ethyl acetate with a solvent mass ratio of 1:1 are mixed to obtain the epoxy resin;
Step (3) preparing a corrosion-resistant copper rod
And (3) coating the corrosion-resistant coating liquid on the surface of the copper rod, and performing heating and curing treatment for 2 hours at the temperature of 100 ℃ to form a corrosion-resistant film on the surface of the copper rod so as to obtain the corrosion-resistant copper rod.
To verify the performance of the corrosion resistant copper bars of examples 1-5 of the present application, comparative examples 1-4 were set up.
Comparative example 1
Comparative example 1 differs from example 1 only in that the modified polysilazane was replaced with an equal mass of perhydro polysilazane (CAS No. 122174-44-1), specifically as follows:
the preparation method of the corrosion-resistant copper rod comprises the following steps:
step (1) preparing corrosion-resistant coating liquid
According to the formula, adding 100 parts of epoxy resin, 30 parts of perhydro polysilazane, 5 parts of iodide ionic liquid, 5 parts of molybdenum boride, 1 part of silane coupling agent, 1 part of dispersing agent and 5 parts of curing agent into 20 parts of solvent, and uniformly mixing to obtain corrosion-resistant coating liquid;
wherein the epoxy resin is E-44, the iodide ionic liquid is iodinated 1, 3-dimethyl imidazole, the silane coupling agent is KH-550, the dispersing agent is laurinol polyoxyethylene ether, the curing agent is diethylenetriamine, and the solvent is toluene;
Step (2) preparing a corrosion-resistant copper rod
And (3) coating the corrosion-resistant coating liquid on the surface of the copper rod, and performing heating and curing treatment for 4 hours at the temperature of 80 ℃ to form a corrosion-resistant film on the surface of the copper rod so as to obtain the corrosion-resistant copper rod.
Comparative example 2
Comparative example 2 differs from example 1 only in that an iodide ionic liquid was replaced with an equal mass of potassium iodide, specifically as follows:
the preparation method of the corrosion-resistant copper rod comprises the following steps:
step (1) preparation of modified polysilazane
S1, adding 23g of 2-benzothiazole-2-oxyacetic acid and 11g of hydroxyethyl ethylenediamine into 100mL of dimethylbenzene, carrying out acylation dehydration reaction for 6h at 130 ℃, carrying out intramolecular dehydration reaction for 4h at 200 ℃ until no water is generated, and carrying out reduced pressure distillation to obtain an intermediate;
s2, adding 15g of perhydro polysilazane (CAS No. 122174-44-1) into 100mL of anhydrous tetrahydrofuran, uniformly stirring, adding 20g of intermediate and 1g of dibutyltin dilaurate, raising the temperature to 50 ℃, reacting for 8 hours under the protection of inert gas, and removing the solvent by rotary evaporation after the reaction is finished to obtain modified polysilazane;
step (2) preparing corrosion-resistant coating liquid
According to the formula, adding 100 parts of epoxy resin, 30 parts of modified polysilazane, 5 parts of potassium iodide, 5 parts of molybdenum boride, 1 part of silane coupling agent, 1 part of dispersing agent and 5 parts of curing agent into 20 parts of solvent, and uniformly mixing to obtain corrosion-resistant coating liquid;
wherein the epoxy resin is E-44, the silane coupling agent is KH-550, the dispersing agent is laurinol polyoxyethylene ether, the curing agent is diethylenetriamine, and the solvent is toluene;
Step (3) preparing a corrosion-resistant copper rod
And (3) coating the corrosion-resistant coating liquid on the surface of the copper rod, and performing heating and curing treatment for 4 hours at the temperature of 80 ℃ to form a corrosion-resistant film on the surface of the copper rod so as to obtain the corrosion-resistant copper rod.
Comparative example 3
Comparative example 3 differs from example 1 only in that the iodide ionic liquid was replaced with an equal mass of modified polysilazane, specifically as follows:
the preparation method of the corrosion-resistant copper rod comprises the following steps:
step (1) preparation of modified polysilazane
S1, adding 23g of 2-benzothiazole-2-oxyacetic acid and 11g of hydroxyethyl ethylenediamine into 100mL of dimethylbenzene, carrying out acylation dehydration reaction for 6h at 130 ℃, carrying out intramolecular dehydration reaction for 4h at 200 ℃ until no water is generated, and carrying out reduced pressure distillation to obtain an intermediate;
s2, adding 15g of perhydro polysilazane (CAS No. 122174-44-1) into 100mL of anhydrous tetrahydrofuran, uniformly stirring, adding 20g of intermediate and 1g of dibutyltin dilaurate, raising the temperature to 50 ℃, reacting for 8 hours under the protection of inert gas, and removing the solvent by rotary evaporation after the reaction is finished to obtain modified polysilazane;
step (2) preparing corrosion-resistant coating liquid
According to the formula, adding 100 parts of epoxy resin, 35 parts of modified polysilazane, 5 parts of molybdenum boride, 1 part of silane coupling agent, 1 part of dispersing agent and 5 parts of curing agent into 20 parts of solvent, and uniformly mixing to obtain corrosion-resistant coating liquid;
wherein the epoxy resin is E-44, the silane coupling agent is KH-550, the dispersing agent is laurinol polyoxyethylene ether, the curing agent is diethylenetriamine, and the solvent is toluene;
Step (3) preparing a corrosion-resistant copper rod
And (3) coating the corrosion-resistant coating liquid on the surface of the copper rod, and performing heating and curing treatment for 4 hours at the temperature of 80 ℃ to form a corrosion-resistant film on the surface of the copper rod so as to obtain the corrosion-resistant copper rod.
Comparative example 4
Comparative example 4 differs from example 1 only in that the modified polysilazane is replaced with an iodide ionic liquid of equal mass, in particular as follows:
the preparation method of the corrosion-resistant copper rod comprises the following steps:
step (1) preparing corrosion-resistant coating liquid
According to the formula, adding 100 parts of epoxy resin, 35 parts of iodide ionic liquid, 5 parts of molybdenum boride, 1 part of silane coupling agent, 1 part of dispersing agent and 5 parts of curing agent into 20 parts of solvent, and uniformly mixing to obtain corrosion-resistant coating liquid;
wherein the epoxy resin is E-44, the iodide ionic liquid is iodinated 1, 3-dimethyl imidazole, the silane coupling agent is KH-550, the dispersing agent is laurinol polyoxyethylene ether, the curing agent is diethylenetriamine, and the solvent is toluene;
Step (2) preparing a corrosion-resistant copper rod
And (3) coating the corrosion-resistant coating liquid on the surface of the copper rod, and performing heating and curing treatment for 4 hours at the temperature of 80 ℃ to form a corrosion-resistant film on the surface of the copper rod so as to obtain the corrosion-resistant copper rod.
Performance detection
The corrosion resistant copper bars obtained in examples 1 to 5 and comparative examples 1 to 4 of the present application were tested for their combination properties, respectively, and the test results are shown in Table 1 below.
(1) Binding force test
The corrosion-resistant copper rod is placed on a workbench of the scratch tester, the scratch tester is fastened, and the scratch needle is perpendicular to the corrosion-resistant copper rod coating. Starting a scratch tester, setting the scratch speed to be 5mm/min, the loading rate to be 10N increased per minute, setting the scratch length to be 10cm, performing scratch operation according to the parameters until the coating is peeled off, and recording the load value when the coating is peeled off. Each example, each comparative example was tested 5 times and averaged.
(2) Acid resistance test
The corrosion-resistant copper rod is placed in 2wt% acetic acid, boiled and maintained for 10min, taken out after being placed in a 23 ℃ environment for 2h, immediately washed clean by clean water, and the surface of the copper rod is inspected by a 4-fold magnifying glass after being wiped dry.
(3) Alkali resistance test
The corrosion-resistant copper rod is placed in a sodium carbonate solution with the weight percent of 2 percent, is taken out after being placed for 2 hours under the environment of 23 ℃, is immediately washed clean by clean water, and is inspected by a 4-time magnifying glass after being wiped dry.
(4) Salt water corrosion resistance test
The corrosion-resistant copper rod is placed in 5wt% sodium chloride solution, heated to boiling, kept slightly boiling, and heated for 7 hours, and distilled water is timely supplemented to the sodium chloride solution lost by evaporation in the boiling process, so that the height of the solution is kept unchanged. Stopping heating, placing the copper rod in the environment of 23 ℃ for 16 hours, taking out, immediately washing with clear water to clean salt, wiping, and checking the surface of the copper rod with a 4-time magnifying glass.
(5) Contact angle test
The wettability of the corrosion-resistant copper bar coating was characterized using a contact angle meter, using 5 μl of water droplets each time, repeated at least 5 times at different locations, and averaged.
Table 1:
| Binding force/N | Acid resistance test | Alkali resistance test | Salt water corrosion resistance test | Contact angle/° | |
| Example 1 | 72 | No surface change | No surface change | No surface change | 152 |
| Example 2 | 74 | No surface change | No surface change | No surface change | 155 |
| Example 3 | 75 | No surface change | No surface change | No surface change | 160 |
| Example 4 | 69 | No surface change | No surface change | No surface change | 158 |
| Example 5 | 70 | No surface change | No surface change | No surface change | 154 |
| Comparative example 1 | 50 | With tiny pits on the surface | Matt surface | With tiny pits on the surface | 133 |
| Comparative example 2 | 63 | No surface change | No surface change | No surface change | 147 |
| Comparative example 3 | 57 | With tiny pits on the surface | Matt surface | With tiny pits on the surface | 140 |
| Comparative example 4 | 42 | The surface has larger corrosion pits | Matt surface | The surface has larger corrosion pits | 125 |
From the data shown in the table 1, the comprehensive performance of the corrosion-resistant copper bars obtained in the examples 1-5 is obviously better than that of the comparative examples 1-4, the corrosion-resistant coating liquid can form a layer of compact corrosion-resistant film on the surface of the copper bars, and the corrosion-resistant film has excellent hydrophobic performance, can effectively block corrosion channels, reduces the erosion effect of corrosion medium on the internal copper bars, and further improves the corrosion resistance of the copper bars.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
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