Preparation method of anti-falling corrosion-resistant double-metal composite coating

Abstract

The invention discloses a preparation method of an anti-falling corrosion-resistant double-metal composite coating. The composite coating consists of a composition A, a composition B and heat-resistant filler in a weight ratio of 1.5: 1: 1; 0.5-1 part of compound rare earth, 30-35 parts of a vapor phase inhibitor, 20-25 parts of deionized water and 10-15 parts of a thixotropic agent are added into the composition B; the heat-resistant filler comprises nanosilicon dioxide, blocking functional filler and powdered aluminum in a mass ratio of 1.5: 1: 1; the blocking functional filler comprises the following components in parts by mass: 2-6 parts of hollow glass beads, 10-15 parts of graphite, 20-35 parts of black silicon carbide, 25-30 parts of fine crystal aluminum oxide, 5-10 parts of molybdenum disulfide, 1-5 parts of zinc oxide and 3-6 parts of talcum powder.

Description

technical field [0001] The invention relates to the field of composite paint and its production and preparation, in particular to a preparation method of an anti-shedding and corrosion-resistant bimetallic composite paint. Background technique [0002] In order to prevent the occurrence and development of metal corrosion, metal rust removal, rust prevention and anticorrosion operations have to be carried out; there are many methods to prevent metal corrosion, and the metal protection methods currently used can be divided into three categories: one is anodic oxidation treatment, That is, an anodic oxidation film of tens of microns is formed on the metal surface, but its application is limited due to the high energy consumption of the anodic oxidation process and the serious pollution of the electrolyte solution, which is difficult to handle; the second type is the chemical conversion film, that is, the metal parts Soaked in a solution of a certain composition, relying on a ch...

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Problems solved by technology

[0002] In order to prevent the occurrence and development of metal corrosion, metal rust removal, rust prevention and anticorrosion operations have to be carried out; there are many methods to prevent metal corrosion, and the metal protection methods currently used can be divided into three categories: one is anodic oxidation treatment, That is, an anodic oxidation film of tens of microns is formed on the metal surface, but its application is limited due to the high energy consumption of the anodic oxidation process and the serious pollution of the electrolyte solution, which is difficult to handle; the second type is the chemical conversion film, that is, the metal parts Soaked in a solution of a certain composition, relying on a chemical reaction at a certain temperature to form a chemical conversion film, the most widely used now is the chemical oxidation of chromate, but chromate is a carcinogenic toxic substance, the world's environment The protection organization has restricted the use of chromate and other chromate-containing compounds; the third category is organic coating, which is to apply an organic coating on the metal surface to improve the appearance and physical and chemical properties of the metal