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Graphene high temperature resistant corrosion-resistant coating for metallic material and preparation method of graphene high temperature resistant corrosion-resistant coating

A technology for anti-corrosion coatings and metal materials, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of adding graphene quantum dots, poor thermal conductivity and anti-corrosion performance of coatings, unfavorable human body and environment, etc., to achieve good thermal conductivity, Improve anti-corrosion performance and reduce the effect of coagulation

Inactive Publication Date: 2018-07-13
HUNAN GUOSHENG GRAPHITE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the existing graphene coatings, because graphene is easy to condense, it is dispersed unevenly in the coating, which makes the thermal conductivity and anti-corrosion performance of the coating poor.
In order to reduce the cohesion between graphenes and improve the stability of graphenes in coatings, it is usually necessary to add chemical preparations such as polyethylene wax, polyvinyl chloride, polyvinylpyrrolidone as dispersants or surfactants, although adding the above dispersants can To a certain extent, reduce the condensation between graphene, but use chemical agents to volatilize during the anti-corrosion process, which is harmful to the human body and the environment
At the same time, in order to improve the color of the coating and enhance the adhesion of the coating, the existing graphene high-temperature anti-corrosion coatings for metal materials will also add colorants and adhesion promoters with toxic components. and the environment is very unfavorable
[0005] After searching, it is found that there is no report of adding graphene quantum dots in the existing graphene high temperature resistant anti-corrosion coatings for metal materials.

Method used

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  • Graphene high temperature resistant corrosion-resistant coating for metallic material and preparation method of graphene high temperature resistant corrosion-resistant coating
  • Graphene high temperature resistant corrosion-resistant coating for metallic material and preparation method of graphene high temperature resistant corrosion-resistant coating
  • Graphene high temperature resistant corrosion-resistant coating for metallic material and preparation method of graphene high temperature resistant corrosion-resistant coating

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Embodiment 1

[0033] 1. A graphene high-temperature resistant anti-corrosion coating for metal materials, consisting of the following components in parts by weight: 6 parts of graphene oxide, 20 parts of phenolic resin, 6 parts of polyvinyl butyral, 4 parts of rare earth chloride, graphene 12 parts of quantum dots, 5 parts of heat-conducting metal powder, 3 parts of carbon nanotubes, 12 parts of solvent, 2 parts of antioxidant, 5 parts of curing agent and 18 parts of defoamer;

[0034] The size of the graphene quantum dots is 2nm; the solid content of the phenolic resin is 45%; the heat-conducting metal powder is aluminum powder with a particle size of 5 μm; the purity of the carbon nanotubes is ≥96wt%, and the ash content is ≤0.4wt% , the specific surface area is 100-200m 2 / g.

[0035] In this embodiment, the preferred solvent is butanone, the preferred curing agent is ammonium chloride, the preferred defoamer is emulsified silicone oil, and the preferred antioxidant is ascorbic acid.

...

Embodiment 2

[0041] 1. A graphene high temperature resistant anti-corrosion coating for metal materials, consisting of the following components in parts by weight: 12 parts of graphene oxide, 45 parts of phenolic resin, 2 parts of polyvinyl butyral, 1 part of rare earth chloride, graphene 30 parts of quantum dots, 2 parts of heat-conducting metal powder, 6 parts of carbon nanotubes, 30 parts of solvent, 6 parts of antioxidant, 9 parts of curing agent and 12 parts of defoamer;

[0042] The size of the graphene quantum dot is 4nm; the solid content of the phenolic resin is 55%; the heat-conducting metal powder is silver powder with a particle size of 10 μm; the purity of the carbon nanotubes is ≥ 96wt%, and the ash content is ≤ 0.4wt%. The specific surface area is 100~200m 2 / g.

[0043] In this embodiment, the preferred solvent is ethanol, the preferred curing agent is ethylenediamine, the preferred defoamer is organosiloxane, and the preferred antioxidant is sodium sulfite.

[0044] 2, t...

Embodiment 3

[0047] 1. A graphene high-temperature-resistant anti-corrosion coating for metal materials, consisting of the following components in parts by weight: 8 parts of graphene oxide, 25 parts of phenolic resin, 5 parts of polyvinyl butyral, 2 parts of rare earth chloride, graphene 18 parts of quantum dots, 4 parts of heat-conducting metal powder, 5 parts of carbon nanotubes, 24 parts of solvent, 5 parts of antioxidant, 6 parts of curing agent and 15 parts of defoamer;

[0048] The size of the graphene quantum dots is 3nm; the solid content of the phenolic resin is 48%; the heat-conducting metal powder is silver powder with a particle size of 6 μm; the purity of the carbon nanotubes is ≥ 96wt%, and the ash content is ≤ 0.4wt%. The specific surface area is 100~200m 2 / g.

[0049] In this embodiment, the preferred solvent is isopropanol, the preferred curing agent is ethylene triamine, the preferred defoamer is polyoxypropylene glyceryl ether, and the preferred antioxidant is sodium ...

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Abstract

The invention relates to a graphene high temperature resistant corrosion-resistant coating for a metallic material and a preparation method of the graphene high temperature resistant corrosion-resistant coating. The graphene high temperature resistant corrosion-resistant coating consists of the following components in parts by weight: 6-12 parts of graphene oxide, 20-45 parts of a phenolic resin,2-6 parts of polyvinyl butyral, 1-4 parts of rare earth chloride, 12-30 parts of graphene quantum dots, 2-5 parts of a heat conduction metallic powder, 3-6 parts of carbon nanotubes, 12-30 parts of asolvent, 2-6 parts of an antioxidant, 5-9 parts of a curing agent and 12-18 parts of a defoaming agent, wherein the graphene quantum dots is 2-4nm in size; the solid content of the phenolic resin is 45-55%. According to the graphene high temperature resistant corrosion-resistant coating provided by the invention, by the virtue of the good dispersibility of the graphene quantum dots in solvents andrelatively good non-covalent functions of the graphene quantum dots with graphene sheets, two-dimensional sheet structures of the graphene can be overlapped layer by layer in the coating, a compact physical insulating layer can be formed, and the corrosion resistance of the coating can be improved.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion coatings, and more specifically relates to a graphene high-temperature-resistant anti-corrosion coating for metal materials and a preparation method thereof. Background technique [0002] Metal materials will still occupy an important position in the field of materials with their excellent mechanical properties and process properties, but the metal corrosion that occurs all the time has also caused huge losses to human society. Therefore, it is important to develop efficient anti-corrosion coatings to protect them. The most simple and practical method. Storage and transportation equipment, petrochemical equipment, storage roofs and other facilities made of metal materials, on the one hand, will be corroded and damaged by the chemical or electrochemical action of the environmental medium for a long time, on the other hand, they will be unsafe due to heat absorption in summer Hidden dangers,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D161/06C09D5/08C09D7/61C09D7/65
Inventor 林前锋
Owner HUNAN GUOSHENG GRAPHITE TECH CO LTD
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