Cordierite-doped non-chromate Dacromet coating and preparation method

Abstract

The invention discloses a cordierite-doped non-chromate Dacromet coating and a preparation method thereof, the non-chromate Dacromet coating is characterized by comprising the following parts by weight of raw materials: 3-5 parts of cordierite, 3-5 parts of corundum powder, 4-8 parts of silicon carbide, 1-3 parts of fly ash, 5-10 parts of polytetrafluoroethylene powder, 10-15 parts of epoxy resin E42, 10-15 parts of vinyl triamine, 1-2 parts of diatomite, 20-30 parts of zinc powder, 20-30 parts of aluminum powder, 40-50 parts of silane coupling agent KH550, 5-10 parts of ethanol, 50-70 parts of acetone and 0.3-0.6 part of polydimethylsiloxane; the non-chromate Dacromet coating has the advantages of high strength and wear resistance and good liquidity and adhesion, a formed coating is dense and smooth, the defects of low strength and poor wear resistance of a Dacromet coating solution can be solved, the non-chromate Dacromet coating is highly competitive in the market; the cordierite,the fly ash and the like are added for cooperation to reduce the production cost in the premise of no influence on the property of the coating.

Description

technical field [0001] The invention relates to a dacromet paint, which belongs to the field of metal anticorrosion, in particular to a cordierite-doped chrome-free dacromet paint and a preparation method thereof. Background technique [0002] Corrosion of steel directly leads to a large number of accidents or hidden dangers of accidents every year, causing huge economic losses and seriously affecting national economic development and security. How to provide durable corrosion resistance has become a research hotspot. Dacromet coating is a metal anti-corrosion coating composed of scaly zinc powder, aluminum powder chromic anhydride and organic reducing agent. It has been widely used due to its strong corrosion resistance, high temperature resistance, and high permeability. However, , because the Dacromet treatment solution contains about 2% of highly carcinogenic and highly toxic Cr 6+ . Therefore, the current Dacromet coating has the disadvantages of being not environmen...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of chrome-free dacromet coating and preparation method thereof, overcome the bad wear resistance, the low strength shortcoming of dacromet coating existing at present, the technical scheme that the present invention adopts is as follows: