Preparation method for magnesium alloy cast paint

Abstract

The present invention relates to a method for preparing the magnesium casting coating; 0.8 percent paligorskite clay that is configured with 17 percent of water is milled for 3 hours to be made into solution A; secondly 3 percent of talcum powder, 4 percent of diatomite, 0.6 percent of NH4BF4 and 3 percent of boric acid are put into a spherical mill, and is respectively mixed with solution A, 4 percent of silica sol and 67.6 of percent water to be milled for 3 hours to obtain the magnesium alloy metal-typed casting coating; metal mould is heated to be about 200 DEG C, and then is sprayed with a layer of magnesium alloy casting coating on the surface, and is dried finally. The method of the present invention has the advantages of strong heat preservation, flame retardant performance, sticking performance and coating performance, favorable suspension performance and less heat fracture of the casting piece. Oxidation is prevented, so the surface is bright and smooth and is free from oxidized wrinkle.

Description

technical field [0001] The invention relates to a preparation method of magnesium alloy casting paint. Background technique [0002] At present, most of the coatings used in the production of magnesium alloys are borrowed from aluminum alloys, and there are very few special coatings, and magnesium castings often produce hot cracks during use. Contents of the invention [0003] The object of the present invention is to overcome the above-mentioned deficiencies, and propose a method for preparing magnesium alloy casting paint, which has excellent flame retardancy, heat preservation, adhesion and coating properties, no thermal cracking, smooth surface, and no oxidation wrinkle. [0004] The technical scheme of the present invention is: a kind of preparation method of magnesium alloy casting coating, it is characterized in that: 0.8% palygorskite clay is mixed with 17% water and grinds for 3 hours, makes first liquid; Then 3% talcum powder, Put 4% diatomaceous earth, 0.6% NH4...

AI Technical Summary

Problems solved by technology

[0002] At present, the coatings used in the production of magnesium alloys are mostly borrowed from aluminum alloy coatings, and there are very few special coatings, and magnesium castings often produce hot cracks during use.