CN116606576A - High-temperature anti-corrosion coating and preparation method thereof - Google Patents

Abstract

The application relates to a high-temperature anti-corrosion coating and a preparation method thereof, wherein the high-temperature anti-corrosion coating comprises, by weight, 3-5 parts of sulfur polyimide, 12-16 parts of melamine, 10-15 parts of sepiolite, 16-20 parts of graphite flake, 5-8 parts of conductive agent, 12-16 parts of polyamide wax powder, 14-20 parts of benzotriazole, 15-22 parts of triphenylphosphine, 12-18 parts of phytic acid, 4-8 parts of liquid paraffin, 6-12 parts of tetraethylammonium tetrafluoroborate, 4-8 parts of thixotropic agent, 5-10 parts of polycaprolactone, 14-22 parts of polyvinylpyrrolidone, 18-26 parts of butanediol glycidyl ether, 10-14 parts of N-methylpyrrolidone, 4-6 parts of polyurethane dispersant, 5-8 parts of pigment and filler, 4-6 parts of cosolvent and 2-6 parts of defoamer. The scheme provided by the application has the performances of self-lubrication, high temperature resistance and corrosion resistance, and the components of the wear-resistant material are simple and are beneficial to popularization.

Description

A kind of high temperature anti-corrosion coating and preparation method thereof

technical field

The invention relates to the technical field of anti-corrosion materials, in particular to a high-temperature anti-corrosion coating and a preparation method thereof.

Background technique

With the innovation of technology, there are more and more special working conditions. In petrochemical, aerospace, metallurgical power and other fields, some parts of equipment will undergo accelerated corrosion under the combined action of corrosion and high temperature. Coating anti-corrosion coating is one of the most effective ways to solve corrosion problems at present.

However, under high temperature conditions, high temperature resistant anti-corrosion coatings are required, among which ceramic coatings and silicone coatings are widely used, but they have poor adhesion, low mechanical strength, easy cracking and poor H ₂ S resistance.

Contents of the invention

In order to solve the above problems, the present invention provides a high-temperature anti-corrosion coating and a preparation method thereof, so as to improve the high-temperature resistance and anti-corrosion performance of the coating.

The first object of the present invention is to provide a high-temperature anti-corrosion coating, which is made of the following raw material components in parts by weight: 3-5 parts of sulfur polyimide, 12-16 parts of melamine, and 10-15 parts of sepiolite , 16-20 parts of graphite flakes, 5-8 parts of conductive agent, 12-16 parts of polyamide wax powder, 14-20 parts of benzotriazole, 15-22 parts of triphenylphosphine, 12- 18 parts, 4-8 parts of liquid paraffin, 6-12 parts of tetraethylammonium tetrafluoroborate, 4-8 parts of thixotropic agent, 5-10 parts of polycaprolactone, 14-22 parts of polyvinylpyrrolidone, butanediol 18-26 parts of glycidyl ether, 10-14 parts of N-methylpyrrolidone, 4-6 parts of polyurethane dispersant, 5-8 parts of pigment and filler, 4-6 parts of co-solvent, 2-6 parts of defoamer.

Preferably, the high-temperature anti-corrosion coating is made of the following raw material components in parts by weight: 4 parts of sulfur polyimide, 14 parts of melamine, 12.5 parts of sepiolite, 18 parts of graphite flakes, 6.5 parts of conductive agent, polyamide 14 parts of wax powder, 17 parts of benzotriazole, 18.5 parts of triphenylphosphine, 15 parts of phytic acid ester, 6 parts of liquid paraffin, 9 parts of tetraethylammonium tetrafluoroborate, 6 parts of thixotropic agent, poly 7.5 parts of caprolactone, 18 parts of polyvinylpyrrolidone, 22 parts of butanediol glycidyl ether, 12 parts of N-methylpyrrolidone, 5 parts of polyurethane dispersant, 6.5 parts of pigment and filler, 5 parts of cosolvent, 4 parts of defoamer .

Preferably, the pigment and filler are any one or more of titanium dioxide, alumina, hydrophilic silica, and carbon nanotubes.

Preferably, the co-solvent is any one or more of ethanol, ethylene glycol, and ethylene glycol ether.

Preferably, the defoamer is one or more of polyoxypropylene oxide ethylene glyceryl ether, polydimethylsiloxane, higher alcohol and tributyl phosphate.

Preferably, the particle size of the sulfur polyimide is 10-50 μm.

Preferably, epoxy resin is also included, and the epoxy resin is one or more mixtures of phenolic resin, phosphorous novolac epoxy resin and polyphenol glycidyl ether epoxy resin.

Second object of the present invention is to provide a kind of preparation method of high temperature anticorrosion coating, comprises the following steps:

Step 1: Weigh sulfur polyimide, melamine, sepiolite, graphite flakes, conductive agent, polyamide wax powder, benzotriazole, triphenylphosphine, phytate, liquid paraffin, Tetraethylammonium tetrafluoroborate, thixotropic agent, polycaprolactone, polyvinylpyrrolidone, butanediol glycidyl ether, N-methylpyrrolidone;

Step 2: Add the raw materials weighed in step 1 into a dispersion tank, stir and disperse evenly under the condition of a rotating speed of 800-1500r/min, and obtain a mixture A;

Step 3: Weigh polyurethane dispersants, pigments and fillers, cosolvents, and defoamers according to the formula;

Step 4: Add the raw materials in step 3 into the dispersion tank, stir and disperse evenly under the stirring condition of the rotating speed of 300-500r/min, and obtain the mixture B;

Step 5: Add mixture B to mixture A and mix evenly to obtain a high temperature anti-corrosion coating.

Preferably, in step 2, said stirring and dispersing uniformly at a rotation speed of 800-1500r/min comprises: stirring for 30-45min at a rotation speed of 800-1500r/min and an ambient temperature of 25-30°C.

Preferably, in step 4, said stirring and dispersing uniformly under the stirring condition of rotating speed of 300-500r/min includes: stirring and dispersing uniformly under the stirring condition of rotating speed of 300-500r/min, and then grinding to a fineness≤60μm , to obtain mixture B.

Compared with the prior art, the high-temperature anti-corrosion coating provided by the present invention has the following beneficial effects:

The high-temperature anti-corrosion coating prepared by the invention has the properties of self-lubrication, high temperature resistance and corrosion resistance, and the preparation method is simple, easy to operate, low in cost, and the components of the wear-resistant material are simple, easy to process and beneficial to popularization. Among them, the mixture of sulfur polyimide and melamine greatly improves the anti-corrosion performance; the use of sepiolite as a high-temperature resistant inorganic filler significantly improves the fire resistance limit of the coating; the use of graphite flakes as an anti-corrosion filler can block and slow down corrosive media The penetration into the coating significantly improves the anti-corrosion performance of the coating; the use of polycaprolactone can be used to improve the flexibility, low-temperature impact resistance, fluidity and formability of acrylic, polyester, epoxy and other resins. The heat resistance (above 400°C) can reach more than 100h, while the corrosion resistance (salt spray resistance ≥ 2000h) is not affected. The formula composition and preparation process of the invention are simple, reduce the use of additives and complex processes required by traditional coatings, reduce costs and protect the environment.

Detailed ways

The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

It should be noted that, if there is no conflict, various features in the embodiments of the present invention may be combined with each other, and all of them are within the protection scope of the present application. Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used in the description of the present invention in this specification is only for the purpose of describing specific embodiments, and is not used to limit the present invention. The term "and/or" used in this specification includes any and all combinations of one or more of the associated listed items.

In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other. Each raw material described in the present invention is all existing publicly sold products unless otherwise specified.

Example 1

A high-temperature anti-corrosion coating, made of the following raw material components in parts by weight: 3 parts of sulfur polyimide, 12 parts of melamine, 10 parts of sepiolite, 16 parts of graphite flakes, 5 parts of conductive agent, polyamide wax powder 12 parts, 14 parts of benzotriazole, 15 parts of triphenylphosphine, 12 parts of phytic acid ester, 4 parts of liquid paraffin, 6 parts of tetraethylammonium tetrafluoroborate, 4 parts of thixotropic agent, polycaprolactone 5 parts of ester, 14 parts of polyvinylpyrrolidone, 18 parts of butanediol glycidyl ether, 10 parts of N-methylpyrrolidone, 4 parts of polyurethane dispersant, 5 parts of pigment and filler, 4 parts of co-solvent, 2 parts of defoamer.

The implementation steps are as follows:

Step 1: Weigh sulfur polyimide, melamine, sepiolite, graphite flakes, conductive agent, polyamide wax powder, benzotriazole, triphenylphosphine, phytate, liquid paraffin, Tetraethylammonium tetrafluoroborate, thixotropic agent, polycaprolactone, polyvinylpyrrolidone, butanediol glycidyl ether, N-methylpyrrolidone;

Step 2: Add the raw materials weighed in step 1 into a dispersion tank, stir and disperse evenly under the condition of a rotating speed of 800r/min, and obtain a mixture A;

Step 3: Weigh polyurethane dispersants, pigments and fillers, cosolvents, and defoamers according to the formula;

Step 4: Add the raw materials in step 3 into the dispersion tank, stir and disperse evenly under the stirring condition of the rotating speed of 300r/min, and obtain the mixture B;

Step 5: Add mixture B to mixture A and mix evenly to obtain a high temperature anti-corrosion coating.

Example 2

A high-temperature anti-corrosion coating, made of the following raw material components in parts by weight: 4 parts of sulfur polyimide, 14 parts of melamine, 12.5 parts of sepiolite, 18 parts of graphite flakes, 6.5 parts of conductive agent, polyamide wax powder 14 parts, 17 parts of benzotriazole, 18.5 parts of triphenylphosphine, 15 parts of phytic acid ester, 6 parts of liquid paraffin, 9 parts of tetraethylammonium tetrafluoroborate, 6 parts of thixotropic agent, polycaprolactone 7.5 parts of ester, 18 parts of polyvinylpyrrolidone, 22 parts of butanediol glycidyl ether, 12 parts of N-methylpyrrolidone, 5 parts of polyurethane dispersant, 6.5 parts of pigment and filler, 5 parts of cosolvent, 4 parts of defoamer.

The implementation steps are as follows:

Step 1: Weigh sulfur polyimide, melamine, sepiolite, graphite flakes, conductive agent, polyamide wax powder, benzotriazole, triphenylphosphine, phytate, liquid paraffin, Tetraethylammonium tetrafluoroborate, thixotropic agent, polycaprolactone, polyvinylpyrrolidone, butanediol glycidyl ether, N-methylpyrrolidone;

Step 2: Add the raw materials weighed in step 1 into a dispersion tank, stir and disperse evenly under the condition of a rotating speed of 1150r/min, and obtain a mixture A;

Step 3: Weigh polyurethane dispersants, pigments and fillers, cosolvents, and defoamers according to the formula;

Step 4: Add the raw materials in step 3 into the dispersion tank, stir and disperse evenly under the stirring condition of the rotating speed of 400r/min, and obtain the mixture B;

Step 5: Add mixture B to mixture A and mix evenly to obtain a high temperature anti-corrosion coating.

Example 3

A high-temperature anti-corrosion coating, made of the following raw material components in parts by weight: 5 parts of sulfur polyimide, 16 parts of melamine, 15 parts of sepiolite, 20 parts of graphite flakes, 8 parts of conductive agent, polyamide wax powder 16 parts, 20 parts of benzotriazole, 22 parts of triphenylphosphine, 18 parts of phytic acid ester, 8 parts of liquid paraffin, 12 parts of tetraethylammonium tetrafluoroborate, 8 parts of thixotropic agent, polycaprolactone 10 parts of ester, 22 parts of polyvinylpyrrolidone, 26 parts of butanediol glycidyl ether, 14 parts of N-methylpyrrolidone, 6 parts of polyurethane dispersant, 8 parts of pigment and filler, 6 parts of cosolvent, and 6 parts of defoamer.

The implementation steps are as follows:

Step 1: Weigh sulfur polyimide, melamine, sepiolite, graphite flakes, conductive agent, polyamide wax powder, benzotriazole, triphenylphosphine, phytate, liquid paraffin, Tetraethylammonium tetrafluoroborate, thixotropic agent, polycaprolactone, polyvinylpyrrolidone, butanediol glycidyl ether, N-methylpyrrolidone;

Step 2: Add the raw materials weighed in step 1 into a dispersion tank, stir and disperse evenly under the condition of a rotating speed of 1500r/min, and obtain a mixture A;

Step 3: Weigh polyurethane dispersants, pigments and fillers, cosolvents, and defoamers according to the formula;

Step 4: Add the raw materials in step 3 into a dispersion tank, stir and disperse evenly under the stirring condition of a rotating speed of 500r/min, and obtain a mixture B;

Step 5: Add mixture B to mixture A and mix evenly to obtain a high temperature anti-corrosion coating.

Example 4

A high-temperature anti-corrosion coating, made of the following raw material components in parts by weight: 3.5 parts of sulfur polyimide, 13 parts of melamine, 11 parts of sepiolite, 17 parts of graphite flakes, 6 parts of conductive agent, polyamide wax powder 13 parts, 15 parts of benzotriazole, 16 parts of triphenylphosphine, 13 parts of phytic acid ester, 5 parts of liquid paraffin, 7 parts of tetraethylammonium tetrafluoroborate, 5 parts of thixotropic agent, polycaprolactone 6 parts of ester, 15 parts of polyvinylpyrrolidone, 19 parts of butanediol glycidyl ether, 11 parts of N-methylpyrrolidone, 4.5 parts of polyurethane dispersant, 6 parts of pigment and filler, 4.5 parts of co-solvent, 3 parts of defoamer.

The implementation steps are as follows:

Step 1: Weigh sulfur polyimide, melamine, sepiolite, graphite flakes, conductive agent, polyamide wax powder, benzotriazole, triphenylphosphine, phytate, liquid paraffin, Tetraethylammonium tetrafluoroborate, thixotropic agent, polycaprolactone, polyvinylpyrrolidone, butanediol glycidyl ether, N-methylpyrrolidone;

Step 2: Add the raw materials weighed in step 1 into a dispersion tank, stir and disperse evenly under the condition of a rotating speed of 900r/min, and obtain a mixture A;

Step 3: Weigh polyurethane dispersants, pigments and fillers, cosolvents, and defoamers according to the formula;

Step 4: Add the raw materials in step 3 into the dispersion tank, stir and disperse evenly under the stirring condition of the rotating speed of 350r/min, and obtain the mixture B;

Step 5: Add mixture B to mixture A and mix evenly to obtain a high temperature anti-corrosion coating.

Example 5

A high-temperature anti-corrosion coating, made of the following raw material components by weight: 4.5 parts of sulfur polyimide, 15 parts of melamine, 14.5 parts of sepiolite, 19 parts of graphite flakes, 7 parts of conductive agent, polyamide wax powder 15 parts, 19 parts of benzotriazole, 20 parts of triphenylphosphine, 17 parts of phytic acid ester, 7 parts of liquid paraffin, 11 parts of tetraethylammonium tetrafluoroborate, 7 parts of thixotropic agent, polycaprolactone 9 parts of ester, 20 parts of polyvinylpyrrolidone, 25 parts of butanediol glycidyl ether, 13 parts of N-methylpyrrolidone, 5.5 parts of polyurethane dispersant, 7 parts of pigment and filler, 5.5 parts of cosolvent, and 5 parts of defoamer.

The implementation steps are as follows:

Step 1: Weigh sulfur polyimide, melamine, sepiolite, graphite flakes, conductive agent, polyamide wax powder, benzotriazole, triphenylphosphine, phytate, liquid paraffin, Tetraethylammonium tetrafluoroborate, thixotropic agent, polycaprolactone, polyvinylpyrrolidone, butanediol glycidyl ether, N-methylpyrrolidone;

Step 2: Add the raw materials weighed in step 1 into a dispersion tank, stir and disperse evenly under the condition of a rotating speed of 1400r/min, and obtain a mixture A;

Step 3: Weigh polyurethane dispersants, pigments and fillers, cosolvents, and defoamers according to the formula;

Step 4: Add the raw materials in step 3 into the dispersion tank, stir and disperse evenly under the stirring condition of the rotating speed of 400r/min, and obtain the mixture B;

Step 5: Add mixture B to mixture A and mix evenly to obtain a high temperature anti-corrosion coating.

Smearing test: Take samples 1-5 and carry out smearing tests respectively. The test process is to take the same metal plate for smearing, and 6 sides of the metal plate are completely smeared. In each test, five samples are painted with similar thicknesses. Among them, the first One test, primer thickness 300-350 microns and top coat thickness 400-450 microns; second test, primer thickness 350-400 microns and top coat thickness 450-500 microns; third test, primer thickness 300 -350 microns and topcoat thickness 500-550 microns; fourth test, primer thickness 350-400 microns and top coat thickness 550-600 microns; fifth test, primer thickness 380-420 microns and top coat thickness 580 -600 microns;

Salt spray resistance test: multiple metal plates were obtained from the smear test, and the salt spray test was carried out in accordance with GB/T1771-2007. The duration was 5000h. The metal plates were tested, and all the metal plates with existing coatings had blisters and crack. All samples were free from cracking and blistering using the coated metal panels of Examples 1-5. Continue the test again, after the duration reaches 6000h, cracks have occurred in the coating on the metal plate in embodiment 1 and embodiment 5, but the undercoat is intact, and other metal plates are all without cracking and foaming; when the duration After reaching 8000h, foaming and cracking all occurred in the top coat of metal plate in embodiment 1, embodiment 3-5, but the undercoat of all samples is intact; When the duration reaches 10000h, embodiment 1-5 The base coat of the metal plate is still intact.

Resistance to hydrochloric acid and sulfuric acid, take a number of metal plates obtained in the smearing test, according to the SY/T0319-2012 standard, the temperature is 60°, the time lasts 1000h, and the metal plates are tested. All metal plates with existing coatings Blisters and flakes all over. All samples were free from cracking and blistering using the coated metal panels of Examples 1-5. After the duration reaches 2000h, all samples adopt the metal plate of embodiment 1-5 worker's coating to all appear foaming and cracking, but the primer is intact; When the duration reaches 5000h, the primer in all embodiments Layers are still intact.

Alkali resistance, and then take a number of metal plates obtained in the smearing test, according to the SY/T0319-2012 standard, the temperature is 60°, the time lasts 1000h, and the metal plates are tested. All metal plates with existing coatings are tested. There is blistering and peeling. All samples were free from cracking and blistering using the coated metal panels of Examples 1-5.

After the duration reaches 2000h, all samples adopt the metal plate of the coating of embodiment 1-5 worker to all appear blistering and cracking, but the undercoating of all samples is intact; After the duration reaches 5000h, in all embodiments The base coat of the metal plate is still intact.

Specifically, with reference to the following table, the following table is a comparison between the high-temperature anti-corrosion coating of the present invention and existing coatings

It can be seen from the above table that the performance of the high-temperature anti-corrosion coating obtained in Examples 1-5 of the present invention is obviously better than that of the existing coating.

Following table is the comparison of high temperature anticorrosion coating of the present invention and existing coating

It can be seen from the above table that the hardness, impact resistance, friction coefficient and abrasion performance of the high-temperature anti-corrosion coating obtained in Examples 1-5 of the present invention are all better than the existing coatings.

In summary, the high-temperature anti-corrosion coating prepared by the present invention has the properties of self-lubrication, high temperature resistance, and corrosion resistance, and the preparation method is simple, easy to operate, and low in cost. The components of the wear-resistant material are simple, easy to process, and conducive to popularization. Among them, the mixture of sulfur polyimide and melamine greatly improves the anti-corrosion performance; the use of sepiolite as a high-temperature resistant inorganic filler significantly improves the fire resistance limit of the coating; the use of graphite flakes as an anti-corrosion filler can block and slow down corrosive media The penetration into the coating significantly improves the anti-corrosion performance of the coating; the use of polycaprolactone can be used to improve the flexibility, low-temperature impact resistance, fluidity and formability of acrylic, polyester, epoxy and other resins. The heat resistance (above 400°C) can reach more than 100h, while the corrosion resistance (salt spray resistance ≥ 2000h) is not affected. The formula composition and preparation process of the invention are simple, reduce the use of additives and complex processes required by traditional coatings, reduce costs and protect the environment.

It should be noted that when the present invention gives a numerical range, it should be understood that, unless otherwise stated in the present invention, the two endpoints of each numerical range and any value between the two endpoints can be selected. In order to avoid redundant description, the present invention describes preferred embodiments and effects. Although the preferred embodiments of the present invention have been described, those skilled in the art can make these embodiments once they know the basic inventive concepts. Additional changes and modifications. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (10)

1. A high-temperature anticorrosion coating, characterized in that, is made of the following raw material components in parts by weight: 3-5 parts of sulfur polyimide, 12-16 parts of melamine, 10-15 parts of sepiolite, graphite flakes 16-20 parts, 5-8 parts of conductive agent, 12-16 parts of polyamide wax powder, 14-20 parts of benzotriazole, 15-22 parts of triphenylphosphine, 12-18 parts of phytic acid ester, 4-8 parts of liquid paraffin, 6-12 parts of tetraethylammonium tetrafluoroborate, 4-8 parts of thixotropic agent, 5-10 parts of polycaprolactone, 14-22 parts of polyvinylpyrrolidone, butanediol glycidyl ether 18-26 parts, N-methylpyrrolidone 10-14 parts, polyurethane dispersant 4-6 parts, pigments and fillers 5-8 parts, co-solvent 4-6 parts, defoamer 2-6 parts. 2. The high-temperature anti-corrosion coating according to claim 1, characterized in that, the high-temperature anti-corrosion coating is made of the following raw material components in parts by weight: 4 parts of sulfur polyimide, 14 parts of melamine, sepiolite 12.5 parts, 18 parts of graphite flakes, 6.5 parts of conductive agent, 14 parts of polyamide wax powder, 17 parts of benzotriazole, 18.5 parts of triphenylphosphine, 15 parts of phytic acid ester, 6 parts of liquid paraffin, tetrafluoroethylene 9 parts of tetraethylammonium borate, 6 parts of thixotropic agent, 7.5 parts of polycaprolactone, 18 parts of polyvinylpyrrolidone, 22 parts of butanediol glycidyl ether, 12 parts of N-methylpyrrolidone, 5 parts of polyurethane dispersant, 6.5 parts of pigment and filler, 5 parts of co-solvent, 4 parts of defoamer. 3. The high-temperature anti-corrosion coating according to claim 1, wherein the pigment and filler are any one or more of titanium dioxide, aluminum oxide, hydrophilic silica, and carbon nanotubes. 4. The high-temperature anticorrosion coating according to claim 1, wherein the cosolvent is any one or more of ethanol, ethylene glycol, and ethylene glycol ether. 5. The high-temperature anticorrosion coating according to claim 1, wherein the defoamer is one of polyoxypropylene oxide glyceryl ether, polydimethylsiloxane, higher alcohol and tributyl phosphate species or a mixture of several. 6. The high temperature anti-corrosion coating according to claim 1, characterized in that the particle size of the sulfur polyimide is 10-50 μm. 7. high temperature anticorrosion coating according to claim 1, is characterized in that, also comprises epoxy resin, and described epoxy resin is in phenolic resin, phosphorus novolac epoxy resin, polyphenol type glycidyl ether epoxy resin One or more mixtures. 8. according to the preparation method of the high-temperature anticorrosion coating described in any one of claim 1-7, it is characterized in that, comprising the following steps: Step 1: Weigh sulfur polyimide, melamine, sepiolite, graphite flakes, conductive agent, polyamide wax powder, benzotriazole, triphenylphosphine, phytate, liquid paraffin, Tetraethylammonium tetrafluoroborate, thixotropic agent, polycaprolactone, polyvinylpyrrolidone, butanediol glycidyl ether, N-methylpyrrolidone; Step 2: Add the raw materials weighed in step 1 into a dispersion tank, stir and disperse evenly under the condition of a rotating speed of 800-1500r/min, and obtain a mixture A; Step 3: Weigh polyurethane dispersants, pigments and fillers, cosolvents, and defoamers according to the formula; Step 4: Add the raw materials in step 3 into the dispersion tank, stir and disperse evenly under the stirring condition of the rotating speed of 300-500r/min, and obtain the mixture B; Step 5: Add mixture B to mixture A and mix evenly to obtain a high temperature anti-corrosion coating. 9. The preparation method of the high-temperature anticorrosion coating according to claim 8, characterized in that, in step 2, said stirring and dispersing evenly under the condition that the rotating speed is 800-1500r/min comprises: Stir for 30-45min under the condition that the rotation speed is 800-1500r/min and the ambient temperature is 25-30°C. 10. The preparation method of the high-temperature anticorrosion coating according to claim 8, characterized in that, in step 4, said stirring and dispersing evenly under a stirring condition of 300-500r/min at a rotating speed comprises: Stir and disperse evenly under the condition of stirring at a rotating speed of 300-500 r/min, and then grind to a fineness of ≤60 μm to obtain mixture B.