CN112480785A - Special epoxy anticorrosive paint for special equipment and preparation method thereof - Google Patents

Abstract

The embodiment of the present invention relates to a special epoxy anti-corrosion coating for special equipment and a preparation method thereof. The coating is composed of component A and component B, which are prepared in advance and are mixed during construction. The mass ratio of component A to component B is 1:0.2-0.3, and the component A, in terms of mass percentage, includes: epoxy resin 25%-35%, polyurethane 10%-15%, alkali metal silicic acid solution 5%- 10%, inorganic fillers 20%-30%, inorganic pigments 5%-10%, ammonium salt copolymers 2%-3%, functional additives 0.5%-1%, additives 2%-3%, high temperature corrosion inhibitor 0.5 % to 1%, 1% to 3% of siloxane and 5% to 10% of reactive diluent; the component B is: amine curing crosslinking agent. The epoxy anti-corrosion coating for special equipment provided by the embodiment of the present invention can be widely applied to the metal surface of special equipment in special fields such as aerospace, military facilities, petrochemical industry, marine engineering ships, etc. The surface of the special structural metal material provides corrosion protection.

Description

Special epoxy anticorrosive paint for special equipment and preparation method thereof

Technical Field

The embodiment of the invention relates to the field of functional anticorrosive materials, in particular to a special epoxy anticorrosive paint for special equipment and a preparation method thereof.

Background

Corrosion causes a global loss of approximately 10% to 20% of metals per year, and international statistics show: the total loss caused by corrosion accounts for 1-5% of GDP of each country, the economic loss caused by corrosion in China exceeds 2 trillion yuan each year, the amount is extremely huge, about 25% of the economic loss can be solved through effective anticorrosion measures, the corrosion can cause great direct or indirect loss, and the leakage of production equipment and equipment caused by stress corrosion and corrosion fatigue of metal materials can often cause catastrophic major accidents, bring about great economic loss and endanger the personal safety; secondly, metal corrosion can bring about a large amount of metal consumption, and a large amount of resources are wasted.

The corrosion is a large enemy of safety production in petrochemical industry, projects such as oil extraction, refining, production, transportation and the like all depend on metal construction equipment through welding, cutting processing, forging and casting, the manufacturing defects of the equipment such as cracks, spots and the like in the forging process, and air holes, slag inclusions, cracks and the like in the casting process all seriously affect the use reliability of materials, and meanwhile, the corrosion is seriously sensitized and corroded on metal materials by petroleum media, including media such as naphthenic acid, sulfide, chloride and the like brought by crude oil and products in the production process, in the petrochemical production process.

In addition, the petroleum products belong to high-temperature flowing media, high-temperature creep can destroy the capacity of the materials for resisting rupture and excessive deformation and reduce the tensile, compressive and bending properties of the materials, and in petrochemical production, chemical corrosion, electrochemical corrosion and physical corrosion, metal corrosion happens at each part and each process at any moment, so that the strength limit sigma b of the equipment is caused. Yield limit σ s, high-temperature creep limit σ n and endurance limit σ D are sharply reduced, the harmfulness is very serious, the corrosion loss accounts for about 6% of the total value and is far higher than that of other industries, and casualties, shutdown and production halt and environmental pollution are often caused once accidents occur.

Therefore, the material for solving a series of technical problems of environmental protection, safety, high-performance coating, long-acting corrosion prevention and the like in the coating process in the corrosion prevention engineering of China is urgently needed to be solved, and the material not only can ensure the performance of the coating, but also has the advantages of environmental protection and safety and has a certain price advantage per unit area.

Until now, the heavy anti-corrosion paint is still the most main, most effective, most economical and most common protection means for metal structures, and from the production and application conditions at the present stage, the market basically has no anti-corrosion paint which can be directly coated on the surfaces of metal components and wet rusty metal surfaces under heat-insulating coating layers in the base low-temperature and high-temperature environment in the storage and transportation processes, or even if the anti-corrosion paint is available, the adhesion is extremely low, the protection performance on base materials is extremely poor, the long-acting protection effect is difficult to achieve, and the price is extremely high.

The conventional solvent-based anticorrosive paint at present also has a plurality of defects, such as high cost, VOC (volatile organic compounds) contained toxic volatile substances, unsatisfactory physical properties of anticorrosive paints of certain varieties and the like, solvents used in a system belong to flammable and explosive dangerous goods, and great potential safety hazards are generated in the production, transportation and construction processes.

Disclosure of Invention

The technical problem to be solved by the embodiment of the invention is to provide the special epoxy anticorrosive paint for the special equipment, which can meet the effective anticorrosive protection of creep limit sigma n, endurance limit sigma D, strength limit sigma b and yield limit sigma s required by metal materials of the special equipment in various environments, and has the advantages of strong decoration, low energy consumption, no maintenance and long service life.

The technical problem to be further solved in the embodiments of the present invention is to provide a method for preparing an epoxy anticorrosive paint special for a special apparatus, which has a simple process and is easy to implement, so as to efficiently and energy-efficiently prepare an epoxy anticorrosive paint special for a special apparatus, which can meet effective anticorrosive protection of a creep limit σ n, a endurance limit σ D, a strength limit σ b and a yield limit σ s required by a metal material of a special apparatus in various environments, and has the advantages of strong decoration, low energy consumption, no maintenance and long service life.

In order to solve the above technical problems, an embodiment of the present invention first provides the following technical solutions: the special epoxy anticorrosive paint for the special equipment is composed of a component A and a component B which are prepared in advance and are uniformly mixed during construction, wherein the mass ratio of the component A to the component B is 1: 0.2 to 0.3 of a surfactant,

the component A comprises the following components in percentage by mass: 25 to 35 percent of epoxy resin, 10 to 15 percent of polyurethane, 5 to 10 percent of alkali metal silicic acid solution, 20 to 30 percent of inorganic filler, 5 to 10 percent of inorganic pigment, 2 to 3 percent of ammonium salt copolymer, 0.5 to 1 percent of functional additive, 2 to 3 percent of additive, 0.5 to 1 percent of high-temperature corrosion inhibitor, 1 to 3 percent of siloxane and 5 to 10 percent of reactive diluent;

the component B is as follows: amine curing crosslinking agents.

Further, the epoxy resin is one of the following substances: volatiles 110 ℃ 3 h: diglycidyl ether bisphenol A type solvent-free epoxy resin with the content less than or equal to 1 percent, volatile matters are dissolved in the solvent at the temperature of 110 ℃ for 3 h: not more than 1% of polyphenol type glycidyl ether epoxy resin, volatile matter, temperature of 110 ℃ for 3 h: bisphenol hexafluoropropane diglycidyl ether modified solvent-free epoxy resin with the content of less than or equal to 1 percent, volatile matters are reacted at the temperature of 110 ℃ for 3 hours: less than or equal to 1 percent of five-membered diazacyclo polyhydantoin nucleus solvent-free epoxy resin;

the polyurethane is one of perfluoro octyl ethyl acrylate modified polyurethane resin, polysiloxane modified polyurethane resin and cage polysilsesquioxane modified polyurethane resin.

Further, the alkali metal silicate solution is one of the following solutions: a sodium silicate solution with a modulus of 2.4-3.2 and a concentration of 25-36%, a potassium silicate solution with a modulus of 2.4-4.8 and a concentration of 25-30%, and a lithium silicate solution with a modulus of 2.4-3.6 and a concentration of 20-25%.

Further, the inorganic filler is a composite powder material prepared by uniformly mixing the following components in percentage by mass:

20% of white alundum powder;

20% of spherical silica powder;

40% of calcined kaolin; and

20% of flake mica powder;

the inorganic pigment is one of zinc benzoate, modified barium metaborate, zinc phosphomolybdate or titanium phosphate.

Further, the ammonium salt copolymer is a solvent-free high molecular weight alkanol ammonium salt copolymer; the functional assistant is perfluoropolyether allyl ether modified polymer.

Further, the additive is a mixture of an alkyne diol modified wetting agent, a fatty alcohol-based defoaming agent with the carbon number of C14-C28 and a cationic fluorocarbon modified dispersing agent; wherein the additive comprises the following components in percentage by mass: 15-30% of alkyne diol modified wetting agent, 15-30% of fatty alcohol-based defoaming agent with carbon number of C14-C28 and 30-40% of cationic fluorocarbon modified dispersing agent.

Further, the high-temperature corrosion inhibitor is a thiophosphate modified mercapto triazine derivative; the siloxane is one of terminated carboxyl modified polysiloxane, chloroplatinic acid modified polysiloxane or benzimidazole polymer modified polydimethylsiloxane.

Further, the reactive diluent is a monoepoxy compound modified diluent without water and acid residues or a cyclic ester bond modified epoxy compound modified diluent without water and acid residues.

Further, the amine curing crosslinking agent is one of a modified aliphatic amine epoxy curing agent, a diamino-dicyclohexyl methane modified amine epoxy curing agent or a modified alicyclic amine epoxy curing agent.

In order to solve the above technical problem to be further solved, an embodiment of the present invention further provides the following technical solutions: the preparation method of the special epoxy anticorrosive paint for the special equipment comprises the following steps:

preparing a component A and preparing an amine curing crosslinking agent as a component B; and

during construction, gradually adding the component B into the component A under stirring according to a preset mass ratio, stirring while adding to avoid powder agglomeration and bottom sinking until the two are uniformly mixed, and filtering and discharging to obtain a special epoxy anticorrosive paint finished product for special equipment;

wherein the preparation process of the component A is as follows:

according to the percentage content of the formula, adding 5-10% of epoxy resin and all the alkali metal silicic acid solution into a dehydration kettle, starting a stirrer, heating to ensure that the liquid temperature reaches 50-60 ℃, starting a vacuum pump to slowly raise the vacuum degree in the kettle to 0.098-0.1 MPa, controlling the kettle temperature to be 115 +/-5 ℃ to perform vacuum dehydration for 2 hours, then cooling to below 40 ℃, and discharging to obtain anhydrous epoxy alkali metal prepolymer for later use;

adding 10-20% of epoxy resin, all inorganic filler and ammonium salt copolymer into a dispersing and mixing kettle, uniformly dispersing and stirring at a rotating speed of 1800-2000 rmp, adjusting the rotating speed to 200-300 rmp, keeping the rotating speed to avoid powder agglomeration and bottom sinking, sequentially adding inorganic pigment and polyurethane accounting for 10-20% of the total amount, adjusting the rotating speed to 1600-1800 rmp, keeping the rotating speed until the materials are uniformly mixed and dispersed, adjusting the rotating speed to 200-300 rmp, keeping the rotating speed to avoid powder agglomeration and bottom sinking, adding 40% of functional additive accounting for the total amount and 30-50% of additive accounting for the total amount into the dispersing and mixing kettle, uniformly dispersing and stirring at the rotating speed of 800-1200 rmp to obtain mixed slurry for later use;

adding the rest epoxy resin and polyurethane into a dispersing and mixing kettle, uniformly dispersing and stirring at the rotating speed of 800-1200 rmp, adjusting the rotating speed to 200-300 rmp, keeping the rotating speed, sequentially adding the prepared mixed slurry, the rest functional additives and the additives, and adjusting the rotating speed to 1600-1800 rmp for uniformly dispersing at a high speed; adjusting the rotating speed to 200-300 rmp, keeping the rotating speed to avoid powder agglomeration and bottom sinking, starting to add the prepared standby anhydrous epoxy alkali metal prepolymer, the high-temperature corrosion inhibitor, the siloxane and the reactive diluent, adjusting the rotating speed to 600-800 rmp, keeping the rotating speed to continuously disperse for 2-2.5 hours, stopping, filtering and discharging to obtain the component A of the special epoxy anticorrosive paint for the special equipment.

By adopting the technical scheme, the embodiment of the invention at least has the following beneficial effects: the conventional anticorrosive coating system is applied to a less severe chemical corrosion environment in a large quantity, so that penetration occurs in the protective action process of a coating material, various different damage modes are shown, such as tensile fracture of the material, delamination and abrasion of the anticorrosive material, debonding of resin, back projection generated by the material and the like, so that the anticorrosive engineering cannot be avoided, the anticorrosive coating fails in advance to different degrees, and huge economic loss is caused.

1. In the special protection fields of aerospace, military facilities, petrochemical industry, marine ships and warships and the like, because of the special structure, large volume and severe environment of workpieces, the construction and coating process is very complicated, and the low edge retention rate is another important problem of the traditional coating. In many cases, the coating of sharp edges of workpieces is mechanically damaged: impact and wear. When the thickness is reduced, the edge corrosion resistance is reduced. The finished epoxy anticorrosive paint special for special equipment can obviously improve the edge retention rate, and is a protective material with the edge weld coating retention rate and high edge retention rate, so that the film thickness of a sharp edge can be very close to that of a smooth surface after being cured, the mechanical strength, the elastic strength and the hardness of the material are ensured, and the long-term use loss of a steel structure is effectively reduced.

2. The protective material is selected in the metal material engineering of special equipment, is not completely used according to the ideal state of the material, and has diversified production processes and production conditions. The special equipment comprehensively considers the adaptability of the material to operating conditions and environmental factors, the processing performance, the economic performance, the popularization and serialization of the actually available materials, the combination of using conditions and other factors to determine how to correctly select the material. The invention starts from the aspects of light weight, high strength and high impact damage tolerance of metal materials, researches and establishes a coating anticorrosive paint system with reliable surface, and the service life of the whole coating system can be greatly prolonged by adopting an advanced and correct application mode and matching with the use of high-performance paint.

3. Excellent mechanical performance. The mechanical strength is the basis for determining the allowable stress value of the material, and the strength limit σ b of tension, compression and bending is commonly used in the design. And yield limit σ s, and creep limit σ n and endurance limit σ D are also considered at high temperatures. The method can prevent the problem that the capability of the material for resisting rupture and excessive deformation is sharply reduced under the action of external force on the mechanical property of the metal material in the corrosion prevention engineering for a long time.

4. The yield limit of the material caused by high and low temperature environments is solved, and the high-temperature creep of the metal material is obviously reduced. Under the action of external force and high temperature, although the stress of the metal material is not increased any more, the high-temperature creep deformation of the metal material continues along with the increase of time, and unrecoverable plastic deformation, stretching, compression and bending occur, so that the strength limit, the yield limit, the high-temperature creep limit and the endurance limit are seriously reduced.

5. The invention adopts a two-component system of the component A and the component B, the production process and the use operation are both very simple and convenient, when in use, the component B is added into the component A, and after being stirred evenly and filtered, the invention can be directly constructed in the modes of brush coating, spray coating, roll coating, curtain coating, dip coating and the like. The coating can be widely applied to the protection of high-strength steel connecting surfaces in various special environments such as high temperature, high humidity, cold and humidity and the like, has the characteristics of excellent aging resistance, temperature difference resistance, antifogging and anti-condensation, saline-alkali salt fog resistance, high hardness and the like, and becomes a long-acting maintenance-free external coating and a high-performance anticorrosive coating.

Detailed Description

The present invention will be described in further detail with reference to specific examples. It is to be understood that the following illustrative embodiments and description are only intended to illustrate the present invention, and are not intended to limit the present invention, and features of the embodiments and examples of the present invention may be combined with each other without conflict.

The embodiment of the invention provides a special epoxy anticorrosive paint for special equipment, which is a two-component system, and is prepared by mixing a prepared component A and a prepared component B in a weight ratio of 1: 0.2 to 0.3. Preferably, the mass ratio of component a to component B is 1: 0.2.

the specific components and formulas of the component A and the component B are respectively described as follows, and the formula comprises the following components in percentage by mass:

the component A comprises the following components in percentage by mass:

25 to 35 percent of epoxy resin;

10 to 15 percent of polyurethane;

5 to 10 percent of alkali metal silicic acid solution;

20 to 30 percent of inorganic filler;

5 to 10 percent of inorganic pigment;

2% -3% of ammonium salt copolymer;

0.5 to 1 percent of functional auxiliary agent;

2 to 3 percent of additive;

0.5 to 1 percent of high-temperature corrosion inhibitor;

siloxane 1% -3% and

5 to 10 percent of active diluent;

the component B is as follows: amine curing crosslinking agents.

In specific implementation, the epoxy resin adopted by the component A is a volatile matter with the temperature of 110 ℃ for 3 h: diglycidyl ether bisphenol A type solvent-free epoxy resin with the content less than or equal to 1 percent, volatile matters are dissolved in the solvent at the temperature of 110 ℃ for 3 h: not more than 1% of polyphenol type glycidyl ether epoxy resin, volatile matter, temperature of 110 ℃ for 3 h: bisphenol hexafluoropropane diglycidyl ether modified solvent-free epoxy resin with the content of less than or equal to 1 percent, volatile matters are reacted at the temperature of 110 ℃ for 3 hours: less than or equal to 1 percent of one of five-membered diazacyclo multi-hydantoin nucleus solvent-free epoxy resin.

In one embodiment, the polyurethane is one of a perfluorooctyl ethyl acrylate modified polyurethane resin, a polysiloxane modified polyurethane resin, and a cage-type polysilsesquioxane modified polyurethane resin.

In one embodiment, the alkali metal silicate solution is one of a sodium silicate solution with a modulus of 2.4 to 3.2 and a concentration of 25 to 36%, a potassium silicate solution with a modulus of 2.4 to 4.8 and a concentration of 25 to 30%, and a lithium silicate solution with a modulus of 2.4 to 3.6 and a concentration of 20 to 25%.

In one embodiment, the inorganic filler is a composite powder of white corundum powder, spherical silicon micropowder, calcined kaolin and flaky mica powder.

In one embodiment, the composite powder comprises, in mass percent: 20% of white corundum powder, 20% of spherical silicon micropowder, 40% of calcined kaolin and 20% of flaky mica powder. The composite powder has high anti-slip coefficient, strong corrosion resistance and good high temperature resistance, and can realize the continuous high temperature resistance of a coating reaching 400 ℃ and the instant heat resistance reaching 1200 ℃ under the standard state of a product by cooperating with other components.

In one embodiment, the inorganic pigment is one of zinc benzoate, modified barium metaborate, zinc phosphomolybdate, or titanium phosphate.

In one embodiment, the ammonium salt copolymer is a solventless high molecular weight alkanolammonium salt copolymer.

In one embodiment, the functional aid is a perfluoropolyether allyl ether modified polymer; the polymer has excellent chemical inertness, extremely high oxidation resistance, strong corrosion resistance and the like, and cannot be possessed by other elements. Through the grafting and preparation technology of the technical scheme, the compatibility of various media of the whole system is effectively provided, the occurrence of macroscopic phase separation with a double-coated substrate can be avoided, simultaneously, the crystallinity of the whole polymer is effectively reduced, the melting temperature point of the polymer is reduced, the defects of poor condensation resistance, hydrophobicity, icing resistance, self-cleaning performance, low-temperature application performance and the like of the traditional anticorrosive coating are overcome, the anticorrosive coating can be completely competent in a plurality of severe environments, and particularly still shows excellent physical and mechanical properties, various medium contamination resistance, ultra-long-acting weather resistance, oil contamination resistance and chemical resistance under various low-temperature and high-temperature environments.

In one embodiment, the additive is a mixture of an alkyne diol modified wetting agent, a fatty alcohol-based antifoaming agent with carbon number of C14-C28, and a cationic fluorocarbon modified dispersing agent. Wherein the additive comprises the following components in percentage by mass: 15-30% of alkyne diol modified wetting agent, 15-30% of fatty alcohol-based defoaming agent with carbon number of C14-C28 and 30-40% of cationic fluorocarbon modified dispersing agent.

In one embodiment, the high temperature corrosion inhibitor is a phosphorothioate modified mercaptotriazine derivative.

In one embodiment, the siloxane is one of a blocked carboxyl-modified polysiloxane, a chloroplatinic acid-modified polysiloxane, and a benzimidazole polymer-modified polydimethylsiloxane.

In one embodiment, the reactive diluent is one of an anhydrous, acid residue-free mono-epoxy modified diluent or an anhydrous, acid residue-free cyclic ester bond-modified epoxy modified diluent.

In specific implementation, the component A can refer to the following formulas, and the percentages in the table are mass percentages:

the above formulas have small difference in the realization effect, and can prepare the effective anti-corrosion effect meeting the creep limit sigma n, the endurance limit sigma D, the strength limit sigma b and the yield limit sigma s of special equipment materials in various environments.

In practical application, the component A is prepared in advance according to the formula of the component A for later use.

In one embodiment, the amine curing crosslinking agent of component B is one of a modified aliphatic amine epoxy curing agent, a diamino-dicyclohexyl methane modified amine epoxy curing agent, and a modified cycloaliphatic amine epoxy curing agent.

On the other hand, in order to conveniently prepare the special epoxy anticorrosive paint for the special equipment, the embodiment of the invention also provides a preparation method of the special epoxy anticorrosive paint for the special equipment, which comprises the following steps:

preparing a component A and preparing an amine curing crosslinking agent as a component B; and

during construction, gradually adding the component B into the stirred component A according to a preset mass ratio (the component A: the component B is 1: 0.2-0.3), stirring while adding to avoid powder agglomeration and bottom sinking until the two are uniformly mixed, and filtering and discharging to obtain a special epoxy anticorrosive paint finished product for the special equipment;

wherein the preparation process of the component A is as follows:

according to the percentage content of the formula, adding 5-10% of epoxy resin and all the alkali metal silicic acid solution into a dehydration kettle, starting a stirrer, heating to ensure that the liquid temperature reaches 50-60 ℃, starting a vacuum pump to slowly raise the vacuum degree in the kettle to 0.098-0.1 MPa, controlling the kettle temperature to be 115 +/-5 ℃ to perform vacuum dehydration treatment for 2 hours, then cooling to below 40 ℃, and discharging to obtain an anhydrous epoxy alkali metal prepolymer for later use; the epoxy resin and the alkali metal silicic acid solution are mixed and grafted for reaction to generate an anhydrous epoxy alkali metal prepolymer, so that the anhydrous epoxy alkali metal prepolymer has excellent freeze-thaw resistance, can be constructed in a severe cold and low-temperature environment, can remarkably improve the reaction of the active silicic acid and the active iron on the surface of steel to generate chemical bond combination, and ensures that the adhesion of a coating and a base material is quite excellent;

adding 10-20% of epoxy resin, all inorganic filler and ammonium salt copolymer into a dispersing and mixing kettle, uniformly dispersing and stirring at a rotating speed of 1800-2000 rmp, adjusting the rotating speed to 200-300 rmp, keeping the rotating speed to avoid powder agglomeration and bottom sinking, sequentially adding inorganic pigment and polyurethane accounting for 10-20% of the total amount, adjusting the rotating speed to 1600-1800 rmp, keeping the rotating speed until the materials are uniformly mixed and dispersed, adjusting the rotating speed to 200-300 rmp, keeping the rotating speed to avoid powder agglomeration and bottom sinking, adding 40% of functional additive accounting for the total amount and 30-50% of additive accounting for the total amount into the dispersing and mixing kettle, uniformly dispersing and stirring at the rotating speed of 800-1200 rmp to obtain mixed slurry for later use;

adding the rest epoxy resin and polyurethane into a dispersing and mixing kettle, uniformly dispersing and stirring at the rotating speed of 800-1200 rmp, adjusting the rotating speed to 200-300 rmp, keeping the rotating speed, sequentially adding the prepared mixed slurry, the rest functional additives and the additives, and adjusting the rotating speed to 1600-1800 rmp for uniformly dispersing at a high speed; adjusting the rotating speed to 200-300 rmp, keeping the rotating speed to avoid powder agglomeration and bottom sinking, starting to add the prepared standby anhydrous epoxy alkali metal prepolymer, the high-temperature corrosion inhibitor, the siloxane and the reactive diluent, adjusting the rotating speed to 600-800 rmp, keeping the rotating speed to continuously disperse for 2-2.5 hours, stopping, filtering and discharging to obtain the component A of the special epoxy anticorrosive paint for the special equipment.

Generally, the step of uniformly mixing the component A and the component B is performed on the construction site, so that the spraying operation is performed immediately after the components are mixed.

The special epoxy anticorrosive paint for the special equipment provided by the embodiment of the invention has the following beneficial effects:

1. the use is safe. The finished product of the special epoxy anticorrosive paint for the equipment has the advantages of no volatilization of VOC harmful gas, no volatilization of solvent, no waste water, waste gas, waste residue generation and high flash point in the using process, effectively solves the technical problem of directly coating the surfaces of special-shaped diversified and cold-rolled and hot-cast structures of various special equipment in various environments such as high and low temperature, humidity, underwater, closed, high acid and alkali, frequent temperature cycles and the like, and provides a technical scheme with environmental protection, safety and long-term protection.

2. The adaptability is excellent. The protective material is selected in the fields of aerospace, military facilities, petrochemical industry, maritime industry and naval vessels and other special protection, and is not completely used according to the ideal state of the material, and the production process and the production conditions are diversified. The special equipment comprehensively considers the adaptability, the processing performance and the economic performance of the material to operating conditions and environmental factors, and the popularization, the serialization, the combination of using conditions and other factors of actually available materials to determine how to correctly select the material, and scientific effective anti-corrosion measures determine the safety and the service life of the special equipment. The product can completely meet the standard specification limits of equipment in special fields such as GJB9001C-2017 quality management system requirement, TSG 01-2014 Special equipment safety technical specification formulation guide rule, GB/T33942 plus 2017 Special equipment accident emergency plan formulation guide rule, TSG 08-2017 Special equipment use management rule, TSG 07-2019 Special equipment safety technical specification, GB/T37183 plus 2018 Corrosion control engineering full life cycle risk evaluation, JBT 10579 plus 2006 Corrosion data statistical analysis standard method and the like.

3. The corrosion resistance is outstanding. The specification of the Corrosion resistance of the steel member is very important for ensuring the safety of buildings, the service life of the coating completely meets the Corrosion protection of a protective coating system on a steel structure (Corrossion protection of steel structure by protective paint systems) C3-C5M Corrosion environmental condition of ISO12944 international standard, the maximum environmental protection of the requirement of the design life is achieved, and each index is far higher than ASME B31.3-2018 Pressure pipeline specification (ASME Code for Pressure Piping, B31), GB/T31361-, JB/T3578-.

4. Wide application and durable performance. The coating can meet the applicability of special equipment materials in the special protection fields of aerospace, military facilities, petrochemical industry, maritime industry and naval ships and the like, simultaneously prevent corrosion to metal material equipment caused by special environments and special media such as concentration polarization, oxygen depolarization, stray current, hydrogen cyanide, hydrogen sulfide, nitride, thioether, thiophene, disulfide and pickling water, furthest promote the creep limit sigma n, the lasting limit sigma D, the strength limit sigma b and the yield limit sigma s of the equipment, and become a long-acting maintenance-free external protective coating.

5. The construction performance is good. The product has the characteristic of sharp edge and high shrinkage, has no volatile matter in the using process, can be widely applied to corrosion prevention of high-strength steel structure connecting surfaces, has high slip resistance coefficient and strong corrosion resistance, has high production efficiency and good coating adhesive force when performing surface construction on sharp edge fillet positions such as cutting, electric welding seams and the like, cold wind, rivet joints, skip welding positions and the like on the surfaces of steel members, can also effectively control the film thickness, is an energy-saving and environment-friendly good method, and can realize the construction of roller coating, curtain coating, spraying, blade coating, brush coating and dip coating on the surfaces of materials with various shapes.

6. The special epoxy anticorrosive paint for the special equipment has the advantages of simple preparation method, and very simple and convenient production process, packaging, storage, transportation and use operation, thereby reducing the industrialization cost and being beneficial to industrial production.

While embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, which are intended to be illustrative rather than limiting, and many modifications may be made by those skilled in the art without departing from the spirit and the scope of the invention as defined by the appended claims.

Claims (10)

1. a special-purpose epoxy anti-corrosion coating for special equipment, is characterized in that, described coating is made up of component A and component B that are pre-prepared respectively and are mixed evenly during construction, wherein, described component A and The mass ratio of component B is 1:0.2-0.3, and the component A, in terms of mass percentage, includes: epoxy resin 25%-35%, polyurethane 10%-15%, alkali metal silicic acid solution 5%-10%, Inorganic filler 20%～30%, inorganic pigment 5%～10%, ammonium salt copolymer 2%～3%, functional additive 0.5%～1%, additive 2%～3%, high temperature corrosion inhibitor 0.5%～1 %, siloxane 1% to 3% and reactive diluent 5% to 10%; The component B is: amine curing crosslinking agent. 2. The epoxy anti-corrosion coating for special equipment as claimed in claim 1, wherein the epoxy resin is one of the following substances: volatile matter at 110°C for 3h: diglycidyl ether bisphenol ≤ 1% Type A solvent-free epoxy resin, volatile matter at 110°C for 3h: ≤1% polyphenol glycidyl ether epoxy resin, volatile matter at 110°C for 3h: ≤1% modified with diphenol-based hexafluoropropane diglycidyl ether Solvent-free epoxy resin, volatiles at 110°C for 3h: ≤1% of five-membered diazide ring polyhydantoin solvent-free epoxy resin; The polyurethane is one of perfluorooctyl ethyl acrylate-modified polyurethane resin, polysiloxane-modified polyurethane resin, and cage-type polysilsesquioxane-modified polyurethane resin. 3. The special epoxy anti-corrosion coating for special equipment as claimed in claim 1, wherein the alkali metal silicate solution is one of the following solutions: the modulus is 2.4～3.2, and the concentration is 25%～36% The sodium silicate solution has a modulus of 2.4 to 4.8, a potassium silicate solution with a concentration of 25% to 30%, a lithium silicate solution with a modulus of 2.4 to 3.6 and a concentration of 20% to 25%. 4. The special-purpose epoxy anti-corrosion coating for special equipment as claimed in claim 1, wherein the inorganic filler is a composite powder obtained by mixing the components in the following mass percentages: White corundum powder 20%; Spherical silica powder 20%; Calcined Kaolin 40%; and Flake mica powder 20%; The inorganic pigment is one of zinc benzoate, modified barium metaborate, zinc phosphomolybdate or titanium phosphate. 5. The special epoxy anti-corrosion coating for special equipment as claimed in claim 1, wherein the ammonium salt copolymer is a solvent-free high molecular weight alkanol ammonium salt copolymer; the functional auxiliary agent is perfluoropolyether Allyl ether modified polymers. 6. The special-purpose epoxy anti-corrosion coating for special equipment as claimed in claim 1, wherein the additive is an acetylenic diol modified wetting agent, a fatty alcohol-based defoamer with a carbon number of C14-C28, a cationic type A mixture of fluorocarbon-modified dispersants; wherein, the additives include by mass percentage: 15%-30% of acetylenic diol modified wetting agent, 15%-30% of fatty alcohol-based defoamer with carbon number in C14-C28 %, 30% to 40% of cationic fluorocarbon modified dispersant. 7. The special-purpose epoxy anti-corrosion coating for special equipment according to claim 1, wherein the high-temperature corrosion inhibitor is a phosphorothioate modified mercaptotriazine derivative; the siloxane is an end-capped carboxyl modified It is a kind of polysiloxane, chloroplatinic acid-modified polysiloxane or benzoimidazole polymer-modified polydimethylsiloxane. 8. The special-purpose epoxy anti-corrosion coating for special equipment as claimed in claim 1, wherein the reactive diluent is anhydrous, acid-free mono-epoxy compound modified diluent or anhydrous, acid-free residue The cyclic ester bond modified epoxy compound modified diluent. 9. The epoxy anti-corrosion coating for special equipment as claimed in claim 1, wherein the amine curing crosslinking agent is a modified aliphatic amine epoxy curing agent, a diamino-dicyclohexylmethane modified amine A kind of epoxy curing agent or modified alicyclic amine epoxy curing agent. 10. A preparation method of the special-purpose epoxy anti-corrosion coating for special equipment according to any one of claims 1 to 9, wherein the preparation method comprises the following steps: Prepare Component A, and prepare an amine-based curing crosslinker as Component B; and During construction, gradually add component B to the stirring component A according to the predetermined mass ratio, and add while stirring to avoid powder agglomeration and sinking to the bottom, until the two are mixed evenly, filter out the material, and obtain special equipment Special epoxy anti-corrosion coating finished product; Wherein, the preparation process of described component A is as follows: According to the percentage content of the formula, add 5% to 10% of the total amount of epoxy resin and the total amount of alkali metal silicic acid solution into the dehydration kettle, start the agitator and heat up, so that the liquid temperature reaches 50 to 60 ° C, Start the vacuum pump to make the vacuum degree in the kettle slowly rise to 0.098～0.1MPa, control the temperature of the kettle to be 115±5℃, carry out vacuum dehydration treatment for 2h, then cool down to below 40℃, and discharge the material to obtain anhydrous epoxy alkali metal prepolymer thing, spare; Add 10% to 20% of the total amount of epoxy resin, inorganic filler and ammonium salt copolymer in the total amount into the dispersing mixing kettle, disperse and stir evenly at the speed of 1800 to 2000 rmp, and adjust the speed to 200 to 200 rpm. 300rmp, keep the rotation speed to prevent the powder from agglomerating and sinking to the bottom, start to add inorganic pigments and polyurethane accounting for 10% to 20% of the total amount in turn, adjust the rotation speed to 1600 to 1800rmp, keep the rotation speed until the mixing and dispersion are uniform, adjust the rotation speed To 200 ~ 300rmp, keep the rotation speed to avoid the powder agglomerating and sinking to the bottom, add the functional additives accounting for 40% of the total amount and the additives accounting for 30% ~ 50% of the total amount into the dispersing mixing kettle, at the rotation speed of 800 ~ 1200rmp Disperse and stir evenly to obtain a mixed slurry, which is ready for use; Add the remaining epoxy resin and polyurethane into the dispersing mixing kettle, disperse and stir evenly at the speed of 800-1200rmp, adjust the speed to 200-300rmp, keep the speed and start to mix the pre-made mixed slurry and the remaining functions in turn. Add auxiliaries and additives, adjust the speed to 1600-1800rmp for high-speed stirring and evenly disperse; adjust the speed to 200-300rmp, keep the speed to avoid powder agglomeration and sink to the bottom, and start adding the pre-prepared anhydrous alkali metal epoxy. Prepolymer, high temperature corrosion inhibitor, siloxane, reactive diluent, adjust the rotating speed to 600~800rmp, keep the rotating speed and continue to disperse for 2~2.5hr, stop the filter and discharge the material, that is, the components of the epoxy anti-corrosion coating for special equipment are obtained. A.