Chromium-free Dacromet coating having high insulation property, and preparation method thereof

Abstract

The invention discloses a chromium-free Dacromet coating having a high insulation property, and a preparation method thereof. The chromium-free Dacromet coating is prepared from, by weight, 3-5 parts of mullite, 3-5 parts of corundum powder, 4-8 parts of silicon carbide, 2-4 parts of mica powder, 5-10 parts of polytetrafluoroethylene powder, 10-15 parts of epoxy resin E42, 10-15 parts of vinyltriamine, 1-3 parts of quartz powder, 20-30 parts of zinc powder, 20-30 parts of aluminum powder, 40-50 parts of a silane coupling agent KH550, 5-10 parts of ethanol, 50-70 parts of acetone and 0.3-0.6 part of polydimethylsiloxane; The chromium-free Dacromet coating has a high strength, good resistance, good liquidity and good adhesion, a coating layer formed by the coating is dense and smooth, and the disadvantages of small strength and poor wear resistance of a Dacromet coating liquid are overcome, so the coating has a high market competitiveness; and the insulating mullite added in the invention is simple and has a low production cost, so the coating has the insulating function.

Description

technical field [0001] The invention relates to a dacromet paint, which belongs to the field of metal anticorrosion, in particular to a chrome-free dacromet paint with high insulation 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 enviro...

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: