Sandblast-free corrosion-proof composite coating for thermal spraying and preparation process thereof

A technology of composite coating and thermal spraying coating, which is applied in the direction of metal material coating process, anti-corrosion coating, coating, etc., to achieve the effect of simplifying the construction process, reducing construction cost and improving the scope of work

Inactive Publication Date: 2012-04-11
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the 5th issue of "Shandong Machinery" in 2004, there was an article by Chen Ruguang and Ge Shengsong entitled "Research on Sandblasting Free Coatings for Thermal Spraying", which studied the coating formulation and process performance for thermal spraying without sandblasting, but after In actual operation, it is found that the anticorrosion time of this coating formula is relatively short, and the anticorrosion effect is not ideal

Method used

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  • Sandblast-free corrosion-proof composite coating for thermal spraying and preparation process thereof
  • Sandblast-free corrosion-proof composite coating for thermal spraying and preparation process thereof
  • Sandblast-free corrosion-proof composite coating for thermal spraying and preparation process thereof

Examples

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Embodiment 1

[0057] A sandblasting-free anticorrosion composite coating for thermal spraying, comprising a rust primer and a sandblasting-free roughening layer,

[0058] The rusty primer is obtained by mixing and coating the rusty primer A component and the rusty primer B component,

[0059] The first component of rust primer is composed of the following components:

[0060] Modified epoxy resin 30%,

[0061] Medium oil semi-drying alkyd resin 20%;

[0062] 30% of highly imidized butylated melamine resin with a degree of etherification of 4,

[0063] Solvent 20%,

[0064] The modified epoxy resin is composed of the following components: 43.00% bisphenol A liquid epoxy resin with a molecular weight of 500-600, 25.00% butanol, 14.00% propylene glycol methyl ether acetate, and 18.00% phosphoric acid;

[0065] Solvent is the mixture of xylene and n-butanol weight ratio 1: 1;

[0066] Component B of the rust primer is composed of phosphoric acid and potassium ferrocyanide in a mass ratio o...

Embodiment 2

[0082] A sandblasting-free anticorrosion composite coating for thermal spraying, comprising a rust-carrying primer, a sandblasting-free roughening layer, a thermal spraying layer, a sealing primer and a topcoat.

[0083] The rusty primer is obtained by mixing and coating the rusty primer A component and the rusty primer B component,

[0084] The first component of rust primer is composed of the following components:

[0085] Modified epoxy resin 40%,

[0086] Medium oil semi-drying alkyd resin 10%;

[0087] 20% of highly imidized butylated melamine resin with a degree of etherification of 4,

[0088] Solvent 30%,

[0089] The modified epoxy resin is composed of the following components: 43.00% bisphenol A liquid epoxy resin with a molecular weight of 500-600, 25.00% butanol, 14.00% propylene glycol methyl ether acetate, and 18.00% phosphoric acid;

[0090] Solvent is the mixture of xylene and n-butanol weight ratio 1: 1;

[0091] Component B of the rust primer is composed...

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Abstract

The invention relates to a sandblast-free corrosion-proof composite coating for thermal spraying in the technical field of metal corrosion protection, comprising a rusty primer and a sandblast-free roughened layer, wherein rusty primer is obtained by mixing and applying the following materials: a rusty primer component A: a modified epoxy resin, a medium oil semidry alkyd resin, a highly iminatedbutyl-etherified melamine resin having the degree of etherification of 4, a solvent and a rusty primer component B; and the sandblast-free roughened layer is composed of a sandblast-free roughened layer component A: ferrophosphorus powder, aluminum trippolyhosphate, mica powder, an epoxy resin, propylene glycol methyl ether acetate, dimethylbenzene, a sandblast-free roughened layer component B and stuffing. The preparation process of the sandblast-free corrosion-proof composite coating for thermal spraying comprises applying the rusty primer to a corroded steel surface, and spraying the sandblast-free roughened layer to the rusty primer at the normal temperature in 24 h. Therefore, the problems of high energy consumption and pollution of sandblasting are eliminated; the steps of construction are simplified; the difficulty and cost of construction are reduced; the corrosion protection effect is guaranteed; the environmental pollution is reduced; and the application range of the composite coating is wider.

Description

technical field [0001] The invention relates to the technical field of metal anticorrosion, in particular to a sandblasting-free anticorrosion composite coating for thermal spraying, and also relates to a preparation process of the composite coating. Background technique [0002] According to statistics, metals rusted due to corrosion account for more than 20% of the annual output in the world every year, and the resulting economic losses are about 1 trillion U.S. dollars. The annual economic losses caused by corrosion in my country account for about 4% of the gross national product, exceeding the sum of the losses caused by fire, wind disasters and earthquakes, at least 20 billion yuan. Effective protective measures for metal corrosion include thermal spraying, paint coating and hot-dip galvanizing. [0003] Thermal spraying has the characteristics of simple construction technology and equipment, short construction period and long anti-corrosion time. In recent years, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D167/08C09D161/32C09D5/08C09D7/12C23C4/12C23C4/08
Inventor 葛圣松朱宗奎邵谦王俊祥王凌云
Owner SHANDONG UNIV OF SCI & TECH
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