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Anti-hydrogen corrosion-resistant coating and preparation method

A coating and corrosion-resistant technology, applied in the field of hydrogen-resistant and corrosion-resistant coatings and its preparation, can solve the problems of weak hydrogen resistance and hydrogen embrittlement, and achieve the effect of preventing hydrogen embrittlement, improving corrosion resistance and being easy to achieve.

Active Publication Date: 2018-04-17
SUZHOU SITRI WELDING TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing epoxy coatings have weak hydrogen resistance, and hydrogen embrittlement often occurs

Method used

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  • Anti-hydrogen corrosion-resistant coating and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Raw materials: 31.75% of E44 epoxy resin, 34.29% of diluent, 0.09% of silane coupling agent KH550, 25.30% of polyamide 650 and 8.57% of sodium molybdate. Wherein, the diluent is made of 70% n-butanol and 30% xylene of the total diluent.

[0027] Preparation:

[0028] (1) Mix E44 epoxy resin and part of diluent according to mass percentage, add silane coupling agent KH550 and stir well, and prepare component A, wherein the addition of diluent accounts for 55% of the total diluent;

[0029] (2) Mix polyamide 650 with the remaining diluent to prepare component B;

[0030] (3) After adding sodium molybdate to component A and stirring, then add component B and mix well to obtain the coating.

[0031] Ordinary epoxy paint:

[0032] The basic steps are the same as in Example 1, except that sodium molybdate is not added to the raw materials. The specific component content is: 35.9% of E44 epoxy resin, 36.49% of diluent, 0.11% of silane coupling agent KH550 and 27.5% of poly ...

Embodiment 2

[0059] The basic steps are the same as in Example 1, except that the composition of the diluent is specifically (n-butanol 65% and xylene 35%), (n-butanol 75% and xylene 25%)

[0060] Coating the coating prepared in this embodiment on the surface of the substrate forms a hydrogen permeation barrier film, which can effectively reduce the hydrogen permeability, reduce or even prevent hydrogen embrittlement, and improve corrosion resistance.

Embodiment 3

[0062] Raw materials: 31% E51 epoxy resin, 32% diluent, 0.06% silane coupling agent KH550, 28% polyamide 593 and 8.94% ammonium molybdate. Wherein, the diluent is made of 70% n-butanol and 30% xylene of the total diluent.

[0063] Preparation:

[0064] (1) Mix E51 epoxy resin and part of the diluent according to the mass percentage, add the silane coupling agent KH550 and stir well, and prepare component A, wherein the addition of the diluent accounts for 52% of the total diluent;

[0065] (2) Mix the polyamide 593 with the remaining diluent to prepare component B;

[0066] (3) After adding ammonium molybdate to component A and stirring, then add component B and mix well to obtain the coating.

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PUM

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Abstract

The invention discloses an anti-hydrogen corrosion-resistant coating and a preparation method. The anti-hydrogen corrosion-resistant coating comprises 31-36% of epoxy resin, 32-38% of diluents, 0.06-0.12% of modified coupling agents, 23-28% of curing agents and 3.12-12.5% of molybdate. The preparation method includes the steps: mixing the epoxy resin with parts of the diluents; adding the modifiedcoupling agents to prepare a component A; uniformly mixing the curing agents with residual diluents to prepare a component B; adding the molybdate into the component and performing stirring; adding the component B and uniformly mixing the components to obtain the coating. The coating has the advantages that the surface of a substrate is coated with the coating to form a hydrogen permeation barrier film, hydrogen permeation rate can be effectively reduced, hydrogen brittleness is decreased and even stopped, corrosion resistance can be improved, and the preparation process is simple and easy toimplement.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to a hydrogen-blocking and corrosion-resistant coating and a preparation method thereof. Background technique [0002] Hydrogen permeation and diffusion problems widely exist in the application field of hydrogen, and the permeation of hydrogen will lead to a series of problems, such as hydrogen embrittlement and so on. Hydrogen embrittlement (Hydrogen embrittlement) refers to the severe degradation of mechanical properties of metal materials due to hydrogen absorption or hydrogen permeation during the process of smelting, processing, heat treatment, pickling and electroplating, or when they are used in hydrogen-containing media for a long time. Brittle phenomenon. In recent years, my country's petroleum, chemical and other fields have developed rapidly. As the most widely used base material, hydrogen embrittlement often occurs during use. Therefore, hydrogen-barrier materials h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/63
CPCC08K3/24C08K5/544C09D5/08C09D163/00
Inventor 郑传波陈曦益帼
Owner SUZHOU SITRI WELDING TECH RES INST CO LTD
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