Anticorrosive coating for low surface treatment stainless steel substrate and preparation method of anticorrosive coating

A low surface treatment, anti-corrosion coating technology, used in anti-corrosion coatings, epoxy resin coatings, coatings, etc., can solve the problem of acid and alkali resistance of alkyd system, poor salt water resistance, increase process flow and process cost, stainless steel base It is difficult to adhere to the coating and other problems, so as to avoid weak corrosion resistance, excellent wetting ability, and excellent rust prevention ability.

Active Publication Date: 2017-12-22
成都天合宏业科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, anodic oxidation, electrochemical method, and medium treatment are usually used to improve the corrosion resistance of stainless steel. These methods have their own advantages, but the common disadvantage is that they are not simple enough and the cost is high.
[0003] The use of coating protection has the advantage of being simple and cheap, but the stainless steel substrate is difficult to be adhered to by the coating because of its low surface energy
There are also relevant patented technologies that propose the use of alkyd systems and polyurethane system coatings to have certain adhesion to stainless steel substrates. However, due to the poor acid and alkali resistance and salt water resistance of alkyd systems, the polyurethane system has poor compatibility as a front coating. etc. are not suitable for anti-corrosion coatings on stainless steel substrates
At present, anti-corrosion coatings for stainless steel substrates are usually pretreated by sandblasting, electroplating, and phosphating to increase the surface roughness of the substrate and the ability to be adhered. Size and shape are limited, resulting in limited use of stainless steel

Method used

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  • Anticorrosive coating for low surface treatment stainless steel substrate and preparation method of anticorrosive coating
  • Anticorrosive coating for low surface treatment stainless steel substrate and preparation method of anticorrosive coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The anticorrosion coating for stainless steel substrates with low surface treatment in this embodiment includes: component A and component B, and the weight ratio of component A to component B is 100:20.

[0041] 1) Component A includes the following substances by weight ratio:

[0042] Low epoxy value epoxy resin 28%, Nanya NPES 907, its epoxy equivalent is 1500-1800g / eq;

[0043] γ-Aminopropyltrialkoxysilane 4%;

[0044] High epoxy value epoxy resin 6%, Nanya NPEL 127, its epoxy equivalent is 176-184g / eq;

[0045] Aluminum tripolyphosphate 25%;

[0046] Complex zinc phosphate 16%;

[0047] Precipitated barium sulfate 8.8%, passed through 700 mesh sieve;

[0048] Organic soil slurry 2%;

[0049] Polyacrylate 0.2%, Cam KM-115;

[0050] The first solvent is 10%, wherein, xylene:n-butanol:methyl isobutyl ketone=45:35:20.

[0051] 2) Component B includes the following substances by weight percentage:

[0052] Polyamide resin 75%;

[0053] Carboxy-terminated nitril...

Embodiment 2

[0062] The anticorrosion coating for stainless steel substrates with low surface treatment in this embodiment includes: component A and component B, and the weight ratio of component A to component B is 100:25.

[0063] 1) Component A includes the following substances by weight ratio:

[0064] Low epoxy value epoxy resin 25%, is Mitsui R307, its epoxy equivalent is 1750-2100g / eq;

[0065] γ-Aminopropyltrialkoxysilane 5%;

[0066] High epoxy value epoxy resin 8%, Mitsui R139, its epoxy equivalent is 180-190g / eq;

[0067] Aluminum tripolyphosphate 20%;

[0068] Composite zinc phosphate 20%;

[0069] Precipitated barium sulfate 7.8%, passed through 800 mesh sieve;

[0070] Organic soil slurry 2%;

[0071] Polyacrylate 0.2%, Junjiang D 0190;

[0072] The first solvent 12%, wherein, xylene: n-butanol: methyl isobutyl ketone=50:30:20;

[0073] 2) Component B includes the following substances by weight percentage:

[0074] Polyamide resin 80%;

[0075] Carboxyl-terminated ni...

Embodiment 3

[0084] The anticorrosion coating for stainless steel substrates with low surface treatment in this embodiment includes: component A and component B, and the weight ratio of component A to component B is 100:15.

[0085] 1) Component A includes the following substances by weight ratio:

[0086] Low epoxy value epoxy resin 15%, Nanya NPES 907, epoxy equivalent 1500-1800g / eq;

[0087] γ-Aminopropyltrialkoxysilane 2%;

[0088] High epoxy value epoxy resin 5%, is Mitsui R139, its epoxy equivalent is 180-190g / eq;

[0089] Aluminum tripolyphosphate 29%;

[0090] Composite zinc phosphate 25%;

[0091] Precipitated barium sulfate 8%, passed through 800 mesh sieve;

[0092] Organic soil slurry 1.5%;

[0093] Polyacrylate 0.3%, Huntsman 125-3;

[0094] The first solvent is 14.2%, wherein, xylene: n-butanol: methyl isobutyl ketone=55:25:20;

[0095] 2) Component B includes the following substances by weight percentage:

[0096] Polyamide resin 70%;

[0097] Carboxy-terminated nit...

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Abstract

The invention discloses anticorrosive coating for a low surface treatment stainless steel substrate and a preparation method thereof and belongs to the technical field of the anticorrosive coating. The anticorrosive coating for the low surface treatment stainless steel substrate is prepared from a component A and a component B, wherein the weight ratio of the component A to the component B is 100 to (15 to 25); the component A is prepared from the following components: epoxy resin with low epoxy value, aminosilane, epoxy resin with high epoxy value, aluminum tripolyphosphate, compound zinc phosphate, precipitated barium sulfate, organic soil slurry, polyacrylate and a first solvent, wherein the first solvent comprises xylol, n-butyl alcohol and methyl isobutyl ketone; the component B is prepared from the following components in percentage by weight: polyamide resin, carboxyl-terminated nitrile butadiene rubber and a second solvent, wherein the second solvent comprises xylol and n-butyl alcohol. The anticorrosive coating disclosed by the invention is convenient to use and pre-treatment including sand blasting, electroplating, phosphatization and the like does not need to be carried out on a stainless steel product; a construction technology is simple and is suitable for stainless steel products or components with various sizes and shapes.

Description

technical field [0001] The invention relates to the technical field of anti-corrosion coatings, in particular to an anti-corrosion coating for stainless steel substrates with low surface treatment and a preparation method thereof. Background technique [0002] China's economy has developed into an export-oriented economy highly dependent on the ocean. It is of great practical and strategic significance to improve the ability to exploit marine resources, develop the marine economy, protect the marine ecological environment, and build a marine power. Stainless steel is favored by designers because of its special mechanical and chemical properties, and it is more and more widely used in coastal marine engineering buildings and ship systems. Due to the large amount of chloride contained in the marine environment, pitting corrosion, intergranular corrosion, and stress corrosion of stainless steel cause perforation and fracture. Therefore, it is necessary to design a protective l...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/08C09D7/12
CPCC08K2003/3045C08K2003/321C08K2201/003C08K2201/014C08L2205/025C08L2205/035C09D5/08C09D163/00C08L63/00C08L33/04C08L77/00C08L9/02C08K13/02C08K5/544C08K3/32C08K3/30
Inventor 何治杭周海涛汪晓鸥
Owner 成都天合宏业科技发展有限公司
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