阅读说明：本技术 一种耐高温防腐涂料及其制备方法 (High-temperature-resistant anticorrosive paint and preparation method thereof ) 是由 方钊 李捷 李林波 黄文龙 杨凯 朱成平 于 2021-07-28 设计创作，主要内容包括：本发明涉及铝电解固体废弃物资源循环综合利用技术领域,具体而言,涉及一种耐高温防腐涂料及其制备方法。耐高温防腐涂料包括树脂25～60份,填料15～45份,溶剂10～40份,固化剂0.1～5份,增塑剂1～10份,着色剂0.5～5份和偶联剂0.1～2份；填料包括铝电解废旧阴极材料、氧化铝和沥青；铝电解废旧阴极材料包括经过破碎处理的废弃预焙铝电解槽阴极内衬材料。采用废弃的铝电解废旧阴极材料与树脂、固化剂、增塑剂、偶联剂等搭配使用,使其具有硬度高,耐磨性能好,附着力及抗冲击性能强,高温防腐蚀性能优异,成本低等优点；同时实现铝电解废旧阴极的资源循环综合利用,最大限度的得到高值化利用。(The invention relates to the technical field of recycling and comprehensive utilization of aluminum electrolysis solid waste resources, and particularly relates to a high-temperature-resistant anticorrosive paint and a preparation method thereof. The high-temperature-resistant anticorrosive coating comprises 25-60 parts of resin, 15-45 parts of filler, 10-40 parts of solvent, 0.1-5 parts of curing agent, 1-10 parts of plasticizer, 0.5-5 parts of colorant and 0.1-2 parts of coupling agent; the filler comprises aluminum electrolysis waste cathode materials, aluminum oxide and asphalt; the aluminum electrolysis waste cathode material comprises a crushed waste pre-baked aluminum electrolysis cell cathode lining material. The waste aluminum electrolysis waste cathode material is matched with resin, a curing agent, a plasticizer, a coupling agent and the like for use, so that the aluminum electrolysis waste cathode material has the advantages of high hardness, good wear resistance, strong adhesive force and impact resistance, excellent high-temperature corrosion resistance, low cost and the like; meanwhile, the resource recycling comprehensive utilization of the waste aluminum electrolysis cathodes is realized, and the high-value utilization is obtained to the maximum extent.)

1. The high-temperature-resistant anticorrosive paint is characterized by comprising the following components in parts by mass:

25-60 parts of resin, 15-45 parts of filler, 10-40 parts of solvent, 0.1-5 parts of curing agent, 1-10 parts of plasticizer, 0.5-5 parts of colorant and 0.1-2 parts of coupling agent;

wherein the filler comprises aluminum electrolysis waste cathode material, alumina and asphalt;

the aluminum electrolysis waste cathode material comprises a crushed waste pre-baked aluminum electrolysis cell cathode lining material.

2. The high-temperature-resistant anticorrosive paint as claimed in claim 1, wherein the high-temperature-resistant anticorrosive paint comprises the following components in parts by mass:

30-50 parts of resin, 20-40 parts of filler, 15-25 parts of solvent, 0.5-3 parts of curing agent, 1.5-6 parts of plasticizer, 1-3 parts of colorant and 0.5-1 part of coupling agent.

3. The high-temperature-resistant anticorrosive paint as claimed in claim 1, wherein the chemical components of the aluminum electrolysis waste cathode material comprise, by mass: 90 to 97 percent of C, 0.5 to 3 percent of Al, 1 to 2 percent of F, 0.5 to 1.5 percent of Na, 0.1 to 1 percent of Fe and the balance of inevitable impurities;

preferably, the chemical components of the aluminum electrolysis waste cathode material comprise, by mass: 90 to 95 percent of C, 1 to 3 percent of Al, 1 to 2 percent of F, 0.8 to 1.5 percent of Na, 0.5 to 1 percent of Fe and the balance of inevitable impurities.

4. The high-temperature-resistant anticorrosive paint as claimed in claim 1, wherein in the filler, the mass fraction of the aluminum electrolysis waste cathode material is more than or equal to 70%;

preferably, the granularity of the aluminum electrolysis waste cathode material is 200-300 meshes.

5. The high-temperature-resistant anticorrosive paint according to any one of claims 1 to 4, wherein the resin comprises an epoxy resin and/or a fluorocarbon resin;

preferably, the resin consists of epoxy resin and fluorocarbon resin, wherein the mass fraction of the epoxy resin is more than or equal to 50%.

6. The high-temperature-resistant anticorrosive paint according to any one of claims 1 to 4, wherein the solvent comprises an alcohol solvent and/or a ketone solvent;

preferably, the alcoholic solvent comprises ethanol and/or isopropanol;

preferably, the ketone solvent comprises acetone.

7. The high-temperature-resistant anticorrosive paint according to any one of claims 1 to 4, wherein the curing agent comprises an anhydride curing agent;

preferably, the anhydride-based curing agent includes phthalic anhydride and/or trimellitic anhydride.

8. The high temperature resistant anticorrosive coating according to any one of claims 1 to 4, wherein the plasticizer comprises at least one of glyceryl tristearate, triglyceride, tributyl phosphate, higher alcohols, and carboxylic acids;

preferably, the number of carbon atoms in the higher alcohol is 6-10;

preferably, the higher alcohol includes at least one of n-propanol, sec-butanol, pentanol, and isobutanol;

preferably, the carboxylic acid comprises pimelic acid and/or 1, 4-butanedicarboxylic acid.

9. The high temperature resistant anticorrosive coating according to any one of claims 1 to 4, wherein the colorant comprises carbon black;

preferably, the coupling agent comprises a silane coupling agent.

10. The preparation method of the high-temperature-resistant anticorrosive paint as claimed in any one of claims 1 to 9, characterized by comprising the following steps:

uniformly mixing the raw materials to obtain the high-temperature-resistant anticorrosive paint;

preferably, the preparation method comprises the following steps: and uniformly mixing the mixture containing the resin and the solvent with the mixture containing the filler, the coloring agent and the coupling agent, then adding the plasticizer and the curing agent into the mixture, and uniformly mixing to obtain the high-temperature-resistant anticorrosive paint.

Technical Field

The invention relates to the technical field of recycling and comprehensive utilization of aluminum electrolysis solid waste resources, and particularly relates to a high-temperature-resistant anticorrosive paint and a preparation method thereof.

Background

The metal aluminum is an important metal second to steel in production and consumption, is called tap metal among nonferrous metals, and plays a very important role in national economic development. Since 2002, the yield of raw aluminum in China always stays the first global. In 2019, the domestic raw aluminum yield reaches 3579.5 ten thousand tons, and the yield accounts for about 56.1 percent of the global total yield. With the rapid development of the aluminum electrolysis industry, the discharge amount of the waste aluminum electrolysis cathodes is continuously increased. Since the aluminum electrolysis waste cathode contains about 30-40 wt.% of electrolyte and a small amount of cyanide, the aluminum electrolysis waste cathode is classified as a dangerous solid waste and prohibited from being discarded at will.

Aiming at the problem, the aluminum electrolysis academic world and the industrial industry actively develop related technologies to treat the aluminum electrolysis waste cathodes. The related treatment techniques can be mainly classified into two major categories, namely wet treatment processes and fire treatment processes. Wherein the wet treatment process comprises a flotation treatment process, a chemical leaching treatment process, a lime water soaking treatment process and the like; the pyrogenic process treatment process comprises a rotary kiln roasting treatment process, a high-temperature hydrolysis treatment process, a bauxite sintering treatment process, a Pesienne separation treatment process and the like. The two types of processing technologies mainly aim at two aspects: firstly, aluminum electrolysis waste cathodes are used as fuel; secondly, soluble fluorine and cyanide in the waste cathode of the aluminum electrolysis are removed, and electrolyte and carbonaceous components in the waste cathode are recovered.

However, when the waste cathode for aluminum electrolysis is used as a fuel, cyanide and fluoride in the waste cathode for aluminum electrolysis are decomposed in a high-temperature process, so that the problem of subsequent flue gas treatment is brought; meanwhile, although the solid waste discharged after being used as fuel is converted into general solid waste, the solid waste still occupies a large amount of land resources when being stockpiled or buried.

In addition, after soluble fluorine and cyanide in the waste aluminum electrolysis cathode are removed, the recovered electrolyte can be used for production processes in the fields of metallurgy, chemical engineering and the like under the condition of meeting the requirements. However, when the recovered carbonaceous components are sold as fuels, the additional value is not high, energy cost consumed in the processes of sorting, heat treatment and the like of the waste aluminum electrolysis cathodes is difficult to make up, and the method is not beneficial to industrial popularization and application.

For example, application No. 201510568832.8 discloses a system and method for producing fully graphitized carbon products from waste cathode carbon blocks of electrolytic aluminum, which comprises calcining the waste material at high temperature in a high temperature furnace to decompose and volatilize cyanide in the waste material, and introducing fluoride into the tail gas in the form of vapor, thereby reducing ash content in the waste cathode carbon blocks and increasing graphitization degree thereof. However, the method requires the aluminum electrolysis waste cathode to be graphitized in a high-temperature graphitizing furnace, and has the advantages of low single treatment capacity, high temperature requirement, long production period, high production cost and low economic benefit.

For another example, the application No. 201710053485.4 discloses a ladle carburant and a preparation method thereof, which comprises the steps of crushing waste cathode carbon blocks and waste cathode linings of an aluminum electrolytic cell to be less than 5mm, mixing for 10-20 min, and drying at the temperature of below 300 ℃ to ensure that the water content of the mixed material is less than 1% of the total weight of the mixed material, thereby obtaining the ladle carburant. Although the method can realize the recycling of the aluminum electrolysis waste cathode, the ladle carburant belongs to a cheap and easily-obtained industrial raw material, the price is not high, the aluminum electrolysis waste cathode is used as the ladle carburant after being treated, the added value of the product is extremely limited, and the economic benefit is low.

Therefore, the treatment of the waste aluminum electrolysis cathodes is not only limited to harmless treatment, but more importantly, the waste aluminum electrolysis cathodes are recycled and are utilized with high value as much as possible, so that the method is beneficial to industrial popularization and application.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The first purpose of the invention is to provide a high-temperature-resistant anticorrosive coating, which has the advantages of high hardness, good wear resistance, strong adhesive force and impact resistance, excellent high-temperature corrosion resistance, low cost, good economic benefit and the like by adopting waste aluminum electrolysis waste cathode materials and matching with raw materials such as resin, a curing agent, a plasticizer, a coupling agent and the like; meanwhile, the resource recycling comprehensive utilization of the waste aluminum electrolysis cathodes is realized, the adverse effect on the environment caused by the waste aluminum electrolysis cathodes is reduced, and the waste aluminum electrolysis cathodes are utilized at a high value to the maximum extent.

The second purpose of the invention is to provide a preparation method of the high-temperature-resistant anticorrosive coating, which has the advantages of low raw material cost, simple operation, mild conditions, large-scale production and the like.

In order to achieve the above purpose of the present invention, the following technical solutions are adopted:

the high-temperature-resistant anticorrosive paint comprises the following components in parts by weight:

25-60 parts of resin, 15-45 parts of filler, 10-40 parts of solvent, 0.1-5 parts of curing agent, 1-10 parts of plasticizer, 0.5-5 parts of colorant and 0.1-2 parts of coupling agent;

wherein the filler comprises aluminum electrolysis waste cathode material, alumina and asphalt;

the aluminum electrolysis waste cathode material comprises a crushed waste pre-baked aluminum electrolysis cell cathode lining material.

According to the high-temperature-resistant anticorrosive coating provided by the invention, the waste aluminum electrolysis waste cathode material is matched with the raw materials such as resin, a curing agent, a plasticizer, a coupling agent and the like, so that the high-temperature-resistant anticorrosive coating has strong adhesive force and impact resistance, high hardness, good wear resistance, excellent high-temperature corrosion resistance, low cost and good economic benefit; meanwhile, the resource recycling comprehensive utilization of the waste aluminum electrolysis cathodes is realized, the adverse effect on the environment caused by the waste aluminum electrolysis cathodes is reduced, and the waste aluminum electrolysis cathodes are utilized at a high value to the maximum extent.

In addition, the high-temperature-resistant anticorrosive coating provided by the invention can be widely applied to the corrosion prevention of steel structure equipment of enterprises of metallurgy, chemical engineering, coal and the like below 1000 ℃, the service life of the equipment can be prolonged, and the overhaul allocation cost of the enterprises can be reduced.

The aluminum electrolysis waste cathode material is aluminum electrolysis waste cathode material powder, is derived from a waste prebaked aluminum electrolysis cell cathode lining, and is obtained by crushing the waste prebaked aluminum electrolysis cell cathode lining.

Preferably, the high-temperature-resistant anticorrosive paint comprises the following components in parts by mass:

30-50 parts of resin, 20-40 parts of filler, 15-25 parts of solvent, 0.5-3 parts of curing agent, 1.5-6 parts of plasticizer, 1-3 parts of colorant and 0.5-1 part of coupling agent.

By adopting the proportion range, various performances of the high-temperature-resistant anticorrosive paint can be further improved.

Preferably, the chemical components of the aluminum electrolysis waste cathode material comprise, by mass: 90 to 97 percent of C, 0.5 to 3 percent of Al, 1 to 2 percent of F, 0.5 to 1.5 percent of Na, 0.1 to 1 percent of Fe and the balance of inevitable impurities.

C and Al in the aluminum electrolysis waste cathode material can improve the oxidation resistance and the high temperature resistance of the high-temperature-resistant anticorrosive coating; na in the aluminum electrolysis waste cathode material can improve the water resistance of the high-temperature-resistant anticorrosive paint; f in the aluminum electrolysis waste cathode material can form an F-C bond, which is beneficial to improving the high temperature resistance of the high temperature resistant anticorrosive paint; fe in the aluminum electrolysis waste cathode material can form Fe-C bonds, which is beneficial to improving the durability of the high-temperature resistant anticorrosive paint.

Preferably, the chemical components of the aluminum electrolysis waste cathode material comprise, by mass: 90 to 95 percent of C, 1 to 3 percent of Al, 1 to 2 percent of F, 0.8 to 1.5 percent of Na, 0.5 to 1 percent of Fe and the balance of inevitable impurities.

The aluminum electrolysis waste cathode material adopting the chemical components can further improve various performances of the high-temperature-resistant anticorrosive paint.

Preferably, in the filler, the mass fraction of the aluminum electrolysis waste cathode material is more than or equal to 70%. Including but not limited to, values of any one of 72%, 74%, 76%, 79%, 82%, 85%, 87%, 89%, 91%, 93%, 95%, 98%, or ranges between any two, more preferably 70% to 90%.

Preferably, the granularity of the aluminum electrolysis waste cathode material is 200-300 meshes. Including but not limited to a point value of any one of 230, 240, 250, 270 or a range between any two, more preferably 240-270.

Preferably, the resin comprises an epoxy resin and/or a fluorocarbon resin.

The epoxy resin is a high molecular polymer and is a generic name of a polymer containing more than two epoxy groups in a molecule. The chemical activity of the epoxy group can be opened by a plurality of compounds containing active hydrogen, and the epoxy group is cured and crosslinked to generate a network structure, and is a thermosetting resin.

The fluorocarbon resin has a strong C-F bond as a framework, and has excellent heat resistance, chemical resistance, cold resistance, low-temperature flexibility, weather resistance, electrical property, non-adhesiveness, non-wettability and the like.

Preferably, the resin consists of epoxy resin and fluorocarbon resin, wherein the mass fraction of the epoxy resin is more than or equal to 50%.

More preferably, the mass fraction of the epoxy resin in the resin is 60% to 90%.

The epoxy resin and the fluorocarbon resin are matched for use, and the specific proportion is adopted, so that the toughness of the high-temperature-resistant anticorrosive coating is further improved, and the wear resistance and the adhesion performance of the high-temperature-resistant anticorrosive coating are improved.

Preferably, the solvent comprises an alcohol solvent and/or a ketone solvent.

Preferably, the alcoholic solvent comprises ethanol and/or isopropanol.

Preferably, the ketone solvent comprises acetone.

More preferably, the solvent consists of ethanol, isopropanol and acetone.

Ethanol, commonly known as alcohol, is miscible with water in any ratio and is miscible with chloroform, diethyl ether, methanol, acetone and many other organic solvents.

Isopropyl alcohol is an organic compound, is an isomer of n-propanol, is known as dimethyl methanol and 2-propanol, is a colorless transparent liquid, is soluble in water, and is also soluble in many organic solvents such as alcohol, ether, benzene and chloroform.

Acetone, also known as dimethyl ketone, is a colorless transparent liquid, and is easily soluble in water and organic solvents such as methanol, ethanol, diethyl ether, chloroform, pyridine, etc.

Preferably, the curing agent comprises an anhydride-based curing agent.

Preferably, the anhydride-based curing agent includes phthalic anhydride and/or trimellitic anhydride.

More preferably, the curing agent consists of phthalic anhydride and trimellitic anhydride.

The phthalic anhydride and the trimellitic anhydride are matched for use, so that the high temperature resistance of the high temperature resistant anticorrosive coating is further improved.

Preferably, the plasticizer includes at least one of glyceryl tristearate, a triglyceride, tributyl phosphate, a higher alcohol and a carboxylic acid.

Glyceryl tristearate, also known as tristearin, glyceryl tristearate, and 1,2, 3-octadecanoic acid triglyceride are natural oils and fats, and have the properties of being soluble in hot alcohol, chloroform, benzene and carbon disulfide, and insoluble in water, petroleum ether, diethyl ether and cold alcohol.

Triglyceride plasticizers have better thermal stability and low volatility.

Tributyl phosphate, alias tributyl phosphate, n-butyl phosphate; has low surface tension and is difficult to dissolve in water.

The higher alcohol is also called higher fatty alcohol, and refers to a mixture of monohydric alcohols containing more than three carbon atoms.

Preferably, the number of carbon atoms in the higher alcohol is 6-10.

Preferably, the higher alcohol includes at least one of n-propanol, sec-butanol, pentanol, and isobutanol.

Sec-butanol, also known as 2-butanol, of formula C₄H₁₀O, is a colorless transparent liquid.

Pentanol also known as n-pentanol, chemical formula C₅H₁₂O, colorless liquid, slightly odorous, miscible with ethanol and ether and slightly soluble in water.

Preferably, the carboxylic acid comprises pimelic acid and/or 1, 4-butanedicarboxylic acid.

Pimelic acid also known as 1, 7-pimelic acid, 1, 5-pentanedicarboxylic acid, and mandelic acid, and has molecular formula C₇H₁₂O₄Is a straight chain saturated dicarboxylic acid of seven carbon atoms.

1, 4-butanedicarboxylic acid is also known as adipic acid, 1, 6-adipic acid, 1, 4-butanedicarboxylic acid.

The plasticizer is beneficial to improving the high-temperature resistance of the high-temperature-resistant anticorrosive paint.

Preferably, the colorant comprises carbon black.

Preferably, the coupling agent comprises a silane coupling agent.

The invention also provides a preparation method of the high-temperature-resistant anticorrosive paint, which comprises the following steps: the high-temperature-resistant anticorrosive paint is obtained after all the raw materials are uniformly mixed.

Preferably, the preparation method comprises the following steps: and uniformly mixing the mixture containing the resin and the solvent with the mixture containing the filler, the coloring agent and the coupling agent, then adding the plasticizer and the curing agent into the mixture, and uniformly mixing to obtain the high-temperature-resistant anticorrosive paint.

The preparation method has the advantages of low raw material cost, simple operation, mild conditions, large-scale production and the like.

Compared with the prior art, the invention has the beneficial effects that:

(1) the high-temperature-resistant anticorrosive coating provided by the invention has the advantages of high hardness, good wear resistance, strong adhesive force and impact resistance, excellent high-temperature corrosion resistance, low cost, good economic benefit and the like by adopting the waste aluminum electrolysis waste cathode material and matching with resin, a curing agent, a plasticizer, a coupling agent and the like; meanwhile, the resource recycling comprehensive utilization of the waste aluminum electrolysis cathodes is realized, the adverse effect on the environment caused by the waste aluminum electrolysis cathodes is reduced, and the waste aluminum electrolysis cathodes are utilized at a high value to the maximum extent.

(2) The high-temperature-resistant anticorrosive coating provided by the invention can be widely applied to corrosion prevention of steel structure equipment of enterprises of metallurgy, chemical industry, coal and the like below 1000 ℃, the service life of the equipment can be prolonged, and the overhaul allocation cost of the enterprises can be reduced.

(3) The preparation method of the high-temperature-resistant anticorrosive coating provided by the invention has the advantages of low raw material cost, simplicity in operation, mild conditions, capability of large-scale production and the like.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following detailed description, but those skilled in the art will understand that the following described examples are some, not all, of the examples of the present invention, and are only used for illustrating the present invention, and should not be construed as limiting the scope of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

The epoxy resin used in the following examples and comparative examples of the present invention is EP-12, and the manufacturer is Touchfang brocade anti-corrosive materials Co., Ltd; the model of the fluorocarbon resin is JF-2X, and the manufacturer is Shanghai Dong fluorine chemical company Limited.

The ethanol used in the following examples and comparative examples of the present invention was CAS (64-17-5), manufactured by Aladdin; the model of the isopropanol is CAS (67-63-0), and the manufacturer is Aladdin; the acetone is analytically pure, and the manufacturer is a male chemical industry Co.

The alumina used in the following examples and comparative examples of the present invention was CAS (1344-28-1), manufactured by Aladdin; the type of the asphalt is medium temperature asphalt, and the manufacturer is Hebei Weixiang chemical technology limited.

Phthalic anhydride used in the following examples and comparative examples of the present invention has a CAS number of 85-44-9, manufacturer of Mecanne; trimellitic anhydride has a CAS number of 552-30-7 and is produced by the manufacturer as Aladdin.

The triglyceride used in the following examples and comparative examples of the present invention was medium chain triglyceride, and the manufacturer was Hebei Runsheng Biotech Co., Ltd; the CAS number of the tristearin is 555-43-1, and the manufacturer is Meclin; the CAS number of tributyl phosphate is 126-73-8, and the manufacturer is Meclin; the higher alcohol manufacturer is Mecline; the carboxylic acid manufacturer is alatin.

The carbon black used in the following examples and comparative examples of the present invention was acetylene black, and the manufacturer was Tianjin Xinglogtai chemical products science and technology Co.

The manufacturer of the silane coupling agent used in the following examples and comparative examples of the present invention was Meclin.

The aluminum electrolysis waste cathode powder used in the following examples and comparative examples of the present invention is a crushed waste pre-baked aluminum electrolysis cell cathode lining material.

Example 1

The high-temperature-resistant anticorrosive paint provided by the embodiment comprises the following components:

24g of epoxy resin, 6g of fluorocarbon resin, 10g of ethanol, 4g of isopropanol, 6g of acetone, 28g of aluminum electrolysis waste cathode powder, 4g of alumina, 8g of asphalt, 1.8g of phthalic anhydride, 0.6g of trimellitic anhydride, 0.6g of triglyceride, 1.4g of tristearin, 1.4g of tributyl phosphate, 2.1g of higher alcohol (n-propanol), 1.4g of carbon black and 0.7g of silane coupling agent.

The aluminum electrolysis waste cathode powder comprises the following chemical components in percentage by mass: 90% of C, 3% of Al, 2% of F, 1% of Na, 0.8% of Fe and the balance of inevitable impurities. The particle size of the aluminum electrolysis waste cathode powder is 250 meshes.

The preparation method of the high-temperature-resistant anticorrosive paint comprises the following steps:

(1) putting the resin and the solvent into a stirring kettle, and uniformly stirring to obtain a first mixture;

(2) placing the filler, the coloring agent and the coupling agent in a three-dimensional motion mixer, and uniformly stirring to obtain a second mixture;

(3) and adding the second mixture into the first mixture, then adding a plasticizer and a curing agent into the first mixture, and uniformly stirring the mixture in a stirring kettle to obtain the high-temperature-resistant anticorrosive paint.

Example 2

The high-temperature-resistant anticorrosive paint provided by the embodiment comprises the following components:

24g of epoxy resin, 16g of fluorocarbon resin, 13.75g of ethanol, 5g of isopropanol, 6.25g of acetone, 22.5g of aluminum electrolysis waste cathode powder, 1.5g of alumina, 6g of asphalt, 0.3g of phthalic anhydride, 0.4g of trimellitic anhydride, 0.3g of triglyceride, 0.6g of glycerol tristearate, 1g of tributyl phosphate, 0.6g of higher alcohol (sec-butyl alcohol), 1g of carbon black and 0.8g of silane coupling agent.

The aluminum electrolysis waste cathode powder comprises the following chemical components in percentage by mass: 94% of C, 1% of Al, 2% of F, 1.2% of Na, 0.5% of Fe and the balance of inevitable impurities. The particle size of the aluminum electrolysis waste cathode powder is 250 meshes.

The preparation method of the high-temperature resistant anticorrosive paint of the embodiment is completely the same as that of the embodiment 1.

Example 3

The high-temperature-resistant anticorrosive paint provided by the embodiment comprises the following components:

35g of epoxy resin, 15g of fluorocarbon resin, 12g of ethanol, 3g of isopropanol, 5g of acetone, 16g of aluminum electrolysis waste cathode powder, 2g of alumina, 2g of asphalt, 1.6g of phthalic anhydride, 0.8g of trimellitic anhydride, 1.6g of triglyceride, 1.2g of tristearin, 1.2g of tributyl phosphate, 1.2g of higher alcohol (isobutanol), 1.8g of carbon black and 0.6g of silane coupling agent.

The aluminum electrolysis waste cathode powder comprises the following chemical components in percentage by mass: 92% of C, 1.5% of Al, 1.2% of F, 1.5% of Na, 0.6% of Fe and the balance of inevitable impurities. The particle size of the aluminum electrolysis waste cathode powder is 230 meshes.

The preparation method of the high-temperature resistant anticorrosive paint of the embodiment is completely the same as that of the embodiment 1.

Example 4

The high-temperature-resistant anticorrosive paint provided by the embodiment comprises the following components:

31.5g of epoxy resin, 3.5g of fluorocarbon resin, 10.5g of ethanol, 1.5g of isopropanol, 3g of acetone, 36g of aluminum electrolysis waste cathode powder, 2g of alumina, 2g of asphalt, 1g of phthalic anhydride, 0.6g of trimellitic anhydride, 0.4g of triglyceride, 2.4g of glycerol tristearate, 1.6g of tributyl phosphate, 1.2g of higher alcohol (amyl alcohol), 2g of carbon black and 0.8g of silane coupling agent.

The aluminum electrolysis waste cathode powder comprises the following chemical components in percentage by mass: 95% of C, 1% of Al, 1.2% of F, 1.2% of Na, 0.5% of Fe and the balance of inevitable impurities. The particle size of the aluminum electrolysis waste cathode powder is 300 meshes.

The preparation method of the high-temperature resistant anticorrosive paint of the embodiment is completely the same as that of the embodiment 1.

Example 5

The high-temperature-resistant anticorrosive paint provided by the embodiment comprises the following components:

28g of epoxy resin, 28g of fluorocarbon resin, 15g of ethanol, 15g of isopropanol, 8g of acetone, 10g of aluminum electrolysis waste cathode powder, 2g of alumina, 2g of asphalt, 2g of phthalic anhydride, 2g of trimellitic anhydride, 2g of triglyceride, 2g of tristearin, 2g of tributyl phosphate, 2g of pimelic acid, 4g of carbon black and 1.5g of silane coupling agent.

Wherein, the chemical components of the aluminum electrolysis waste cathode powder are the same as those of the embodiment 1. The particle size of the aluminum electrolysis waste cathode powder is 200 meshes.

The preparation method of the high-temperature resistant anticorrosive paint of the embodiment is completely the same as that of the embodiment 1.

Comparative example 1

The components and the preparation method of the comparative example paint are basically the same as those of example 1, except that the aluminum electrolysis waste cathode powder in the components is replaced by graphite powder with the particle size of 250 meshes, and the aluminum electrolysis waste cathode powder is replaced by the graphite powder in the preparation process.

Comparative example 2

The coating provided by the comparative example comprises the following components:

10g of epoxy resin, 5g of fluorocarbon resin, 3g of ethanol, 2g of isopropanol, 3g of acetone, 10g of aluminum electrolysis waste cathode powder, 20g of alumina, 20g of asphalt, 3g of phthalic anhydride, 3g of trimellitic anhydride, 5g of triglyceride, 5g of tristearin, 2g of tributyl phosphate, 2g of higher alcohol (n-propanol), 1.4g of carbon black and 2.5g of silane coupling agent.

The chemical components and the grain size of the aluminum electrolysis waste cathode powder are completely the same as those of the embodiment 1.

The comparative example coating was prepared exactly the same as example 1.

Test example 1

The coatings prepared in the above examples and comparative examples were subjected to hardness (according to GB/T6739-.

The test method of the high temperature resistance is as follows: baking the sample at 180 ℃ for 2h, then placing the sample into a constant-temperature box type electric furnace checked by a potential difference meter, raising the temperature at the speed of 5 ℃/min, starting timing for 5 hours when the furnace temperature is raised to 600 ℃, then turning off a power supply, cooling to room temperature (25 ℃), and observing whether the surface of the coating has cracks or falls off.

And coating the coatings prepared in the examples and the comparative examples, and soaking the coatings in seawater at 85 ℃ for 24 hours after the coatings are completely dried. As a result, it was found that the coatings of examples 1 to 5 were all intact; while the coatings of comparative examples 1-3 all exhibited partial failure.

TABLE 1 test results for the properties of the various groups of coatings

As can be seen from Table 1, appropriate Al, F, Fe, Na have certain benefits for the coating. The high-temperature-resistant anticorrosive coating has the advantages of high hardness, good wear resistance, strong adhesive force and impact resistance, excellent high-temperature corrosion resistance and the like by adopting the waste aluminum electrolysis waste cathode material and matching with the raw materials of resin, curing agent, plasticizer, coupling agent and the like with specific types and specific dosage. Meanwhile, the method also realizes the resource recycling comprehensive utilization of the waste aluminum electrolysis cathodes, reduces the adverse effect of the waste aluminum electrolysis cathodes on the environment, furthest utilizes the waste aluminum electrolysis cathodes at a high value, and has the advantages of low cost and good economic benefit.

While particular embodiments of the present invention have been illustrated and described, it will be appreciated that the above embodiments are merely illustrative of the technical solution of the present invention and are not restrictive; those of ordinary skill in the art will understand that: modifications may be made to the above-described embodiments, or equivalents may be substituted for some or all of the features thereof without departing from the spirit and scope of the present invention; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; it is therefore intended to cover in the appended claims all such alternatives and modifications that are within the scope of the invention.