Solvent-free zinc powder amorphous alloy anticorrosive paint and preparation method thereof

Abstract

The invention provides a solvent-free zinc powder amorphous alloy anticorrosive paint and a preparation method thereof.The solvent-free zinc powder amorphous alloy anticorrosive paint is composed of a component A and a component B. The component A is prepared from, by mass, 30-35 parts of epoxy resin, 4-9 parts of reactive diluent, 18-25 parts of zinc powder and 9-15 parts of micron sheet amorphous alloy. 4-9 parts of pigment and filler, and 2-3 parts of an auxiliary agent; and the component B is prepared from the following raw materials in parts by mass: 14-19 parts of a curing agent and 1-2 parts of an adhesion promoter. The solvent-free zinc powder amorphous alloy anticorrosive paint provided by the invention has better salt spray resistance, adhesive force, hardness and wear resistance, avoids the use of a large amount of organic solvents, and is simple in preparation process, green and environment-friendly in production and construction and suitable for large-scale popularization and application.

Description

Technical Field

[0001] The invention relates to an anti-corrosion coating, in particular to a solvent-free zinc powder amorphous alloy anti-corrosion coating and a preparation method thereof. Background Art

[0002] my country is a major producer and user of anti-corrosion coatings, and the output of coatings is increasing every year. Epoxy zinc-rich primer is widely used in anti-corrosion coatings of steel facilities and equipment in various industries due to its excellent anti-corrosion properties. It is one of the most widely used types of anti-corrosion coatings. Its function is to use the metal zinc in the coating as an anode to release electrons to provide cathodic protection when corrosion occurs, thereby delaying the corrosion of steel.

[0003] In order to achieve good metal anti-corrosion performance, a large amount of zinc powder (up to 60-80% (HG / T3668-2020)) is usually required to form an electrochemical conductive path. However, the utilization rate of zinc powder is low and it cannot provide long-term corrosion protection. Only about 1 / 3 of the zinc powder connected to the steel surface can participate in cathodic protection, while about 2 / 3 of the isolated zinc powder is inactive. When corrosion occurs, the active zinc powder is gradually oxidized into insulating zinc salts, causing the conductive path to be destroyed and the cathodic protection to fail. In addition, the use of a large amount of zinc powder leads to a reduction in the proportion of film-forming substances and self-adjustable components in the formula, which is not conducive to the optimization of the comprehensive properties of the paint film such as anti-corrosion and mechanics. Therefore, the paint film is brittle and has poor toughness. Failure phenomena such as paint film cracking, stress corrosion, and weld corrosion are prone to occur at sharp edges, internal and external angles, welds, etc.

[0004] At the same time, the use of a large amount of zinc powder also leads to the deterioration of the density and adhesion of the paint film, making the coating prone to blistering, shedding, rusting and other phenomena. In addition, the reserves of zinc on the earth are limited, and half of the total consumption is used for metal corrosion protection. According to statistics from the United States Geological Survey, as of 2019, the world's zinc resources are about 1.9 billion tons, zinc reserves (metal content) are about 250 million tons, and zinc consumption is about 13.76 million tons. The world's zinc mines may only be enough for 16 years of continuous use. Therefore, in recent years, in order to save resources and reduce energy consumption, the research on technologies to reduce the amount of zinc powder and replace zinc powder by adding graphene and using flaky zinc powder has become increasingly extensive. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a solvent-free zinc powder amorphous alloy anti-corrosion coating, which has good salt spray resistance, adhesion, hardness and wear resistance, and avoids the use of a large amount of organic solvents. The preparation process is simple, the production and construction are green and environmentally friendly, and it is suitable for large-scale promotion and application.

[0006] In order to solve the above technical problems, the technical solution of the present invention is:

[0007] A solvent-free zinc powder amorphous alloy anti-corrosion coating consists of component A and component B, wherein component A is made of the following raw materials in parts by mass: 30-35 parts of epoxy resin, 4-9 parts of active diluent, 18-25 parts of zinc powder, 9-15 parts of micron flaky amorphous alloy, 4-9 parts of pigment and filler, and 2-3 parts of additives; component B is made of the following raw materials in parts by mass: 14-19 parts of curing agent and 1-2 parts of adhesion promoter.

[0008] The epoxy resin and active diluent in component A of the present invention contain epoxy groups, while the curing agent in component B contains amino groups. The epoxy resin and active diluent are cured with the curing agent through chemical reactions between the groups to form the matrix of the anticorrosive coating of the present invention. At the same time, the active diluent can not only dilute the coating, which is beneficial to the preparation and coating of the coating, but also contains flexible molecular chains, which can toughen the coating and improve the impact resistance of the coating. Further, the epoxy equivalent of the epoxy resin of the present invention is preferably 160-270g / eq; the active diluent is preferably at least one of polypropylene glycol diglycidyl ether and polyethylene glycol diglycidyl ether; the curing agent is preferably at least one of aliphatic amine curing agents, polyamide curing agents and phenolic amines.

[0009] Zinc is an active metal. In a corrosive environment, zinc undergoes oxidation reaction before iron, thereby protecting the iron substrate from corrosion. Therefore, zinc powder in the coating provides effective cathodic protection for metals such as steel by sacrificing itself. Further, the mesh size of the zinc powder of the present invention is preferably 500-1000 mesh.

[0010] The micron-sized flaky amorphous alloy Fe used in the present invention α M β It has high strength, high hardness, more positive self-corrosion potential and polarization potential, and high corrosion resistance. When it is filled into the coating, it has three effects: ① Due to its flaky structure, it can form a maze effect in the coating, reduce the porosity of the coating, enhance the density of the coating, delay or prevent corrosion factors from penetrating into the surface of the substrate, and thus improve the anti-corrosion performance of the coating; ② It has high mechanical properties and can effectively reduce the internal stress of the coating, consume fracture energy, and thus improve the flexibility, impact resistance and wear resistance of the coating; ③ Its flaky structure can form a stable conductive grid, which can effectively improve the utilization rate of zinc powder, enhance the cathodic protection performance of zinc powder, and reduce the amount of zinc powder used. Furthermore, the micron-flaky amorphous alloy described in the present invention is preferably Fe α M β Alloy, wherein M is at least one of the elements Cr, P, C, B, N, Co, Si, Cu, V, Al, Ti, Ta, Nb, Zr, Mo, and Ni, α and β are atomic percentages, 55≤α≤80, 20≤β≤45, and α+β=100; the particle size of the micron-shaped flaky amorphous alloy is preferably 20-30μm.

[0011] The pigments and fillers used in the present invention are used to promote the formation of a passivation film on the steel surface, inhibit rusting, and adjust the color of the coating, improve hiding power, etc. Further, the pigments and fillers of the present invention are preferably at least one of zinc phosphate, aluminum tripolyphosphate, titanium dioxide, and zinc oxide.

[0012] The additive used in the present invention has the functions of promoting the dispersion of pigments and fillers, adjusting the viscosity of the coating, preventing the sedimentation of zinc powder and amorphous alloy, and eliminating bubbles during the coating preparation and coating process. Furthermore, the additive of the present invention is preferably at least one of a dispersant, a thickener, and a defoamer.

[0013] The adhesion promoter used in the present invention is used to improve the adhesion of the coating on the surface of the steel substrate. Further, the adhesion promoter of the present invention is preferably at least one of silane coupling agents, modified polyesters, and acid copolymers.

[0014] Another technical problem to be solved by the present invention is to provide a method for preparing the above-mentioned solvent-free zinc powder amorphous alloy anti-corrosion coating.

[0015] To solve the above technical problems, the technical solution is:

[0016] A method for preparing a solvent-free zinc powder amorphous alloy anti-corrosion coating comprises the following steps:

[0017] S1. Weigh the raw materials of component A by mass, add the active diluent and dispersant to the epoxy resin in turn, stir at 1000-1500rpm for 5-9min, add the pigment and filler, continue stirring for 20-30min, adjust the speed to 500-1000rpm, then add the micron-shaped amorphous alloy, zinc powder, thickener, defoamer, stir for 12-20min to obtain component A;

[0018] S2. Weigh the raw materials of component B in parts by mass, add the adhesion promoter to the curing agent, and stir at a speed of 1200-1800 rpm for 7-12 min to obtain component B;

[0019] S3. Component A obtained in step S1 and component B obtained in step S2 are mixed, and stirred at a speed of 750-1200 rpm for 6-12 min to obtain a solvent-free zinc powder amorphous alloy anti-corrosion coating.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) In the solvent-free zinc powder amorphous alloy anti-corrosion coating provided by the present invention, there is a synergistic interaction between the micron-sized flaky amorphous alloy and the zinc powder, which makes the coating have excellent comprehensive properties (including hardness, wear resistance, adhesion, salt spray resistance, impact resistance, etc.), and has significant performance advantages over organic solvent epoxy zinc-rich anti-corrosion coatings. At the same time, the coating uses a small amount of zinc powder and has a low VOC content, avoiding the use of a large amount of organic solvents. It is green and environmentally friendly and suitable for large-scale promotion and application.

[0022] (2) The method for preparing the solvent-free zinc powder amorphous alloy anti-corrosion coating provided by the present invention has a simple process, low odor, good environmental performance, and is suitable for large-scale preparation. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below in conjunction with specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0024] Example 1

[0025] Solvent-free zinc powder amorphous alloy anti-corrosion coating A is composed of component A and component B, wherein component A is made of the following raw materials in parts by mass: 33 parts of epoxy resin (Yoshida Chemical E51), 6.5 parts of active diluent (polypropylene glycol diglycidyl ether, Chuzhou Huisheng Electronics D-1217), 20 parts of zinc powder (Daxiao Chemical, 800 mesh), 20 parts of micron-shaped amorphous alloy (Fe 72 Cr8P5C5B 10 , particle size 25μm) 13 parts, color filler 6 parts (1.5 parts zinc phosphate, 1.5 parts aluminum tripolyphosphate, 3 parts titanium dioxide), dispersant (BYK-9076) 1.5 parts, thickener (Coapur XS83) 0.5 parts, defoamer (BASF Efka PB 2770) 0.5 parts; Component B is made of the following raw materials in parts by mass: curing agent (polyamide, Evonik Ancamide350A) 17 parts, adhesion promoter (modified polyester, Evonik Addbond LP 1611) 2 parts.

[0026] The preparation method of Example 1 comprises the following steps:

[0027] S1. Weigh the raw materials of component A by mass, add the active diluent and dispersant to the epoxy resin in turn, stir at 1200 rpm for 5 min, add the pigment and filler, continue stirring for 25 min, adjust the speed to 800 rpm, then add the micron-shaped amorphous alloy, zinc powder, thickener, defoamer, stir for 15 min to obtain component A;

[0028] S2. Weigh the raw materials of component B by mass, add the adhesion promoter to the curing agent, and stir at 1500 rpm for 10 min to obtain component B;

[0029] S3. Component A obtained in step S1 and component B obtained in step S2 are mixed, and stirred at a speed of 1000 rpm for 8 min to obtain a solvent-free zinc powder amorphous alloy anti-corrosion coating A.

[0030] Example 2

[0031] Solvent-free zinc powder amorphous alloy anti-corrosion coating B is composed of component A and component B, wherein component A is made of the following raw materials in parts by mass: 30 parts of epoxy resin (Nan Ya NPEL-128), 4 parts of active diluent (polyethylene glycol diglycidyl ether, Chuzhou Huisheng Electronics D-205), 25 parts of zinc powder (Daxiao Chemical, 1000 mesh), 25 parts of micron-shaped amorphous alloy (Fe 72 Cr8P 10 C5B5, particle size 30μm) 14 parts, pigments and fillers 9 parts (2 parts zinc phosphate, 2 parts aluminum tripolyphosphate, 5 parts zinc oxide), dispersant (BASF Efka PX 4703) 1 part, thickener (TEGO-3000) 0.5 parts, defoamer (BYK-A530) 0.5 parts; Component B is made of the following raw materials in parts by mass: curing agent (fatty amine, Junjiang Technology D6630) 14 parts, adhesion promoter (silicon-free acidic copolymer, Merck MOK-7614, Germany) 2 parts.

[0032] The preparation method of Example 2 comprises the following steps:

[0033] S1. Weigh the raw materials of component A by mass, add the active diluent and dispersant to the epoxy resin in turn, stir at 1500 rpm for 6 min, add the pigment and filler, continue stirring for 20 min, adjust the speed to 1000 rpm, then add the micron-shaped amorphous alloy, zinc powder, thickener, defoamer, stir for 12 min to obtain component A;

[0034] S2. Weigh the raw materials of component B by mass, add the adhesion promoter to the curing agent, and stir at 1200 rpm for 8 min to obtain component B;

[0035] S3. Component A obtained in step S1 and component B obtained in step S2 are mixed, and stirred at a speed of 800 rpm for 6 min to obtain a solvent-free zinc powder amorphous alloy anti-corrosion coating B.

[0036] Example 3

[0037] Solvent-free zinc powder amorphous alloy anti-corrosion coating C is composed of component A and component B, wherein component A is made of the following raw materials in parts by mass: 35 parts of epoxy resin (Taiwan Changchun BE-188), 9 parts of active diluent (polyethylene glycol diglycidyl ether, Chuzhou Huisheng Electronics D-205), 18 parts of zinc powder (Daxiao Chemical, 500 mesh), 18 parts of micron-shaped amorphous alloy (Fe 72 Cr8P 10 C5B5, particle size 20μm) 12 parts, color filler 4 parts (3 parts aluminum tripolyphosphate, 1 part titanium dioxide), dispersant (ECO-2900) 1 part, thickener (Huate New Material BP-200B) 0.5 parts, defoamer (TEGO Airex 900) 0.5 parts; Component B is made of the following raw materials in parts by mass: curing agent (phenolic amine, Cardolite NX-2003D) 19 parts, adhesion promoter (modified polyester, Evonik AddBond LTW-B) 1 part.

[0038] The preparation method of Example 3 comprises the following steps:

[0039] S1. Weigh the raw materials of component A by mass, add the active diluent and dispersant to the epoxy resin in turn, add the pigment and filler after stirring at 1000 rpm for 7 min, continue stirring for 24 min, adjust the speed to 500 rpm, then add the micron-shaped amorphous alloy, zinc powder, thickener, defoamer in turn, and stir for 18 min to obtain component A;

[0040] S2. Weigh the raw materials of component B by mass, add the adhesion promoter to the curing agent, and stir at 1000 rpm for 9 min to obtain component B;

[0041] S3. Component A obtained in step S1 and component B obtained in step S2 are mixed, and stirred at a speed of 800 rpm for 6 min to obtain a solvent-free zinc powder amorphous alloy anti-corrosion coating C.

[0042] Example 4

[0043] Solvent-free zinc powder amorphous alloy anti-corrosion coating D is composed of component A and component B, wherein component A is made of the following raw materials in parts by mass: 32 parts of epoxy resin (Nan Ya NPEF-170), 6 parts of active diluent (polypropylene glycol diglycidyl ether, Chuzhou Huisheng Electronics D-1217), 24 parts of zinc powder (Daxiao Chemical, 800 mesh), 24 parts of micron-shaped amorphous alloy (Fe 76Si6B8P9Cu1, particle size 30μm) 9 parts, pigments and fillers 8.5 parts (2 parts zinc phosphate, 3 parts aluminum tripolyphosphate, 1.5 parts titanium dioxide, 2 parts zinc oxide), dispersant (DISPERBYK-2008) 2 parts, thickener (RM-2020) 0.5 parts, defoamer (Merck MOK-6621) 0.5 parts; Component B is made of the following raw materials in parts by mass: curing agent (polyamide, Hansen EP1KURE 3164, USA) 16 parts, adhesion promoter (aminopropyltriethoxysilane, Dow Corning OFS-6011) 1.5 parts.

[0044] The preparation method of Example 4 comprises the following steps:

[0045] S1. Weigh the raw materials of component A by mass, add the active diluent and dispersant to the epoxy resin in turn, add the pigment and filler after stirring at 1300 rpm for 8 min, continue stirring for 28 min, adjust the speed to 600 rpm, then add the micron-shaped amorphous alloy, zinc powder, thickener, defoamer in turn, and stir for 14 min to obtain component A;

[0046] S2. Weigh the raw materials of component B by mass, add the adhesion promoter to the curing agent, and stir at 1800 rpm for 10 min to obtain component B;

[0047] S3. Component A obtained in step S1 and component B obtained in step S2 are mixed, and stirred at 750 rpm for 12 min to obtain a solvent-free zinc powder amorphous alloy anti-corrosion coating D.

[0048] Example 5

[0049] Solvent-free zinc powder amorphous alloy anti-corrosion coating E is composed of component A and component B, wherein component A is made of the following raw materials in parts by mass: 31 parts of epoxy resin (Hansen EP1KOTE 862, USA), 5 parts of active diluent (polypropylene glycol diglycidyl ether, Chuzhou Huisheng Electronics D-1217), 19 parts of zinc powder (Daxiao Chemical, 1000 mesh), 19 parts of micron-shaped amorphous alloy (Fe 72 Cr8P5C 10 B5, particle size 25μm) 15 parts, pigments and fillers 7 parts (3 parts zinc phosphate, 3 parts titanium dioxide, 1 part zinc oxide), dispersant (DISPERBYK-108) 1 part, thickener (Dow RM-2050D) 0.5 parts, defoamer (Defom2700) 0.5 parts; Component B is made of the following raw materials in parts by mass: curing agent (polyamide, Evonik Ancamide 910) 19 parts, adhesion promoter (3-aminopropyltrimethoxysilane, Adama KH540) 2 parts.

[0050] The preparation method of Example 5 comprises the following steps:

[0051] S1. Weigh the raw materials of component A by mass, add the active diluent and dispersant to the epoxy resin in turn, stir at 1400 rpm for 9 min, add the pigment and filler, continue stirring for 30 min, adjust the speed to 700 rpm, then add the micron-shaped amorphous alloy, zinc powder, thickener, defoamer, stir for 20 min to obtain component A;

[0052] S2. Weigh the raw materials of component B by mass, add the adhesion promoter to the curing agent, and stir at 1300 rpm for 7 min to obtain component B;

[0053] S3. Component A obtained in step S1 and component B obtained in step S2 are mixed, and stirred at a speed of 1200 rpm for 8 min to obtain a solvent-free zinc powder amorphous alloy anti-corrosion coating E.

[0054] Comparative Example 1

[0055] The solvent-free amorphous alloy anti-corrosion coating is composed of component A and component B, wherein component A is made of the following raw materials in parts by weight: 33 parts of epoxy resin (Yoshida Chemical E51), 6.5 parts of active diluent (polypropylene glycol diglycidyl ether, Chuzhou Huisheng Electronics D-1217), micron-shaped amorphous alloy (Fe 72 Cr8P5C5B 10 , particle size 25μm) 33 parts, color filler 6 parts (1.5 parts zinc phosphate, 1.5 parts aluminum tripolyphosphate, 3 parts titanium dioxide), dispersant (BYK-9076) 1.5 parts, thickener (Coapur XS83) 0.5 parts, defoamer (BASF Efka PB 2770) 0.5 parts; component B is made of the following raw materials in parts by mass: curing agent (polyamide, Evonik Ancamide 350A) 17 parts, adhesion promoter (modified polyester, Evonik Addbond LP 1611) 2 parts.

[0056] The preparation method of Comparative Example 1 comprises the following steps:

[0057] S1. Weigh the raw materials of component A by mass, add the active diluent and dispersant to the epoxy resin in turn, stir at 1200 rpm for 5 min, add the pigment and filler, continue stirring for 25 min, adjust the speed to 800 rpm, then add the micron-shaped amorphous alloy, thickener and defoamer in turn, and stir for 15 min to obtain component A;

[0058] S2. Weigh the raw materials of component B by mass, add the adhesion promoter to the curing agent, and stir at 1500 rpm for 10 min to obtain component B;

[0059] S3. Component A obtained in step S1 and component B obtained in step S2 are mixed, and stirred at a speed of 1000 rpm for 8 min to obtain a solvent-free amorphous alloy anti-corrosion coating.

[0060] Comparative Example 2

[0061] The solvent-free zinc powder anti-corrosion coating consists of component A and component B, wherein component A is made of the following raw materials in parts by mass: 33 parts of epoxy resin (Yoshida Chemical E51), 6.5 parts of active diluent (polypropylene glycol diglycidyl ether, Chuzhou Huisheng Electronics D-1217), 33 parts of zinc powder (Daxiao Chemical, 800 mesh), 6 parts of pigments and fillers (1.5 parts of zinc phosphate, 1.5 parts of aluminum tripolyphosphate, 3 parts of titanium dioxide), 1.5 parts of dispersant (BYK Chemical BYK-9076), 0.5 parts of thickener (Coapur XS83), and 0.5 parts of defoamer (BASF EfkaPB 2770); component B is made of the following raw materials in parts by mass: 17 parts of curing agent (polyamide, Evonik Ancamide 350A), and 2 parts of adhesion promoter (modified polyester, Evonik Addbond LP 1611).

[0062] The preparation method of Comparative Example 2 comprises the following steps:

[0063] S1. Weigh the raw materials of component A by mass, add the active diluent and dispersant to the epoxy resin in turn, stir at 1200 rpm for 5 min, add the pigment and filler, continue stirring for 25 min, adjust the speed to 800 rpm, then add zinc powder, thickener and defoamer in turn, stir for 15 min to obtain component A;

[0064] S2. Weigh the raw materials of component B by mass, add the adhesion promoter to the curing agent, and stir at 1500 rpm for 10 min to obtain component B;

[0065] S3. Component A obtained in step S1 and component B obtained in step S2 are mixed, and stirred at a speed of 1000 rpm for 8 min to obtain a solvent-free zinc powder anti-corrosion coating.

[0066] Comparative Example 3

[0067] The organic solvent epoxy zinc-rich anti-corrosion coating is composed of component A and component B, wherein component A is made of the following raw materials in parts by mass: 13 parts of epoxy resin (Yoshida Chemical E20), 15 parts of organic solvent (dibutyl ester / n-butanol mass ratio is 1:1), 60 parts of zinc powder (Daxiao Chemical, 800 mesh), 1.5 parts of thickener (CoapurXS83), and 0.5 parts of defoamer (BASF Efka PB2770); component B is composed of the following raw materials in parts by mass: 10 parts of curing agent (polyamide 650, Shuangying Chemical).

[0068] The preparation method of Comparative Example 3 comprises the following steps:

[0069] S1. Weigh the raw materials of component A by mass, add the organic solvent to the epoxy resin, stir at 1200 rpm for 5 min, adjust the speed to 800 rpm, then add zinc powder, thickener, defoamer, stir for 15 min to obtain component A;

[0070] S2. Weigh the raw materials of component B by mass, mix component A and component B obtained in step S1, and stir at 1000 rpm for 8 min to obtain an organic solvent epoxy zinc-rich anti-corrosion coating.

[0071] Experimental example:

[0072] The anti-corrosion coatings prepared in Examples 1-5 and Comparative Examples 1-3 were used to prepare test samples according to the standard "GB / T 9271-2008 Standard Test Plates for Paints and Varnishes", and the solid content, hardness, wear resistance, adhesion, salt spray resistance, and impact resistance were tested accordingly. Among them, the solid content test is based on "GB / T 1725-2007 Determination of non-volatile content of paints, varnishes and plastics"; the hardness test is based on "GB / T 6739-2022 Paint and varnish pencil method to determine the hardness of paint film"; the wear resistance test is based on "GB / T 1768-2006 Paint and varnish wear resistance determination rotating rubber grinding wheel method" using 1000g / 1000r, grinding wheel model CS-10; the adhesion test is based on "GB / T 5210-2006 Paint and varnish pull-off adhesion test"; the salt spray resistance test is based on "GB / T 1771-2007 Paint and varnish resistance to neutral salt spray performance"; the impact resistance test is based on "GB / T 1732-2020 Determination of film impact resistance", and the weight of the hammer is 1000g. The test results are shown in Table 1:

[0073] Table 1

[0074]

[0075] As can be seen from Table 1, from the comparison of the solvent-free zinc powder amorphous alloy anticorrosion coatings of Examples 1-5 with the solvent-free amorphous alloy anticorrosion coatings without zinc powder added in Comparative Example 1 and the solvent-free zinc powder anticorrosion coatings without amorphous alloy added in Comparative Example 2, it can be seen that there is a synergistic interaction between the amorphous alloy and the zinc powder in the solvent-free zinc powder amorphous alloy anticorrosion coatings, and the two have a promoting effect on enhancing the comprehensive performance of the coating on the steel surface (such as hardness, wear resistance, adhesion, salt spray resistance, impact resistance, etc.), and at the same time, the coating has a low VOC content and excellent environmental protection performance. Compared with the traditional organic solvent epoxy zinc-rich anticorrosion coating of Comparative Example 3, the solvent-free zinc powder amorphous alloy anticorrosion coatings of Examples 1-5 of the present invention have significant performance advantages.

[0076] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A solvent-free zinc powder amorphous alloy anti-corrosion coating, characterized in that: It consists of component A and component B, wherein component A is made of the following raw materials in parts by mass: 30-35 parts of epoxy resin, 4-9 parts of active diluent, 18-25 parts of zinc powder, 9-15 parts of micron-flaky amorphous alloy, 4-9 parts of pigment and filler, and 2-3 parts of additives; component B is made of the following raw materials in parts by mass: 14-19 parts of curing agent and 1-2 parts of adhesion promoter.

2. The solvent-free zinc powder amorphous alloy anti-corrosion coating according to claim 1, characterized in that: The epoxy equivalent of the epoxy resin is 160-270 g / eq.

3. The solvent-free zinc powder amorphous alloy anti-corrosion coating according to claim 1, characterized in that: The active diluent is at least one of polypropylene glycol diglycidyl ether and polyethylene glycol diglycidyl ether.

4. The solvent-free zinc powder amorphous alloy anti-corrosion coating according to claim 1, characterized in that: The mesh size of the zinc powder is 500-1000 meshes.

5. The solvent-free zinc powder amorphous alloy anti-corrosion coating according to claim 1, characterized in that: The micron-sized flaky amorphous alloy is Fe α M β Alloy, wherein M is at least one of the elements Cr, P, C, B, N, Co, Si, Cu, V, Al, Ti, Ta, Nb, Zr, Mo, and Ni, α and β are atomic percentages, 55≤α≤80, 20≤β≤45, and α+β=100; and the particle size of the micron-shaped flaky amorphous alloy is 20-30μm.

6. The solvent-free zinc powder amorphous alloy anti-corrosion coating according to claim 1, characterized in that: The pigment filler is at least one of zinc phosphate, aluminum tripolyphosphate, titanium dioxide and zinc oxide.

7. The solvent-free zinc powder amorphous alloy anti-corrosion coating according to claim 1, characterized in that: The auxiliary agent is at least one of a dispersant, a thickener and a defoamer.

8. The solvent-free zinc powder amorphous alloy anti-corrosion coating according to claim 1, characterized in that: The curing agent is at least one of aliphatic amine curing agents, polyamide curing agents, and phenolic amine curing agents.

9. The solvent-free zinc powder amorphous alloy anti-corrosion coating according to claim 1, characterized in that: The adhesion promoter is at least one of silane coupling agents, modified polyesters and acid copolymers.

10. The method for preparing a solvent-free zinc powder amorphous alloy anticorrosion coating according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Weigh the raw materials of component A by mass, add the active diluent and dispersant to the epoxy resin in turn, stir at 1000-1500rpm for 5-9min, add the pigment and filler, continue stirring for 20-30min, adjust the speed to 500-1000rpm, then add the micron-shaped amorphous alloy, zinc powder, thickener, defoamer, stir for 12-20min to obtain component A; S2. Weigh the raw materials of component B in parts by mass, add the adhesion promoter to the curing agent, and stir at a speed of 1200-1800 rpm for 7-12 min to obtain component B; S3. Component A obtained in step S1 and component B obtained in step S2 are mixed, and stirred at a speed of 750-1200 rpm for 6-12 min to obtain a solvent-free zinc powder amorphous alloy anti-corrosion coating.

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