Heat resistant paint for iron and steel

Abstract

The heat temperature resistant paint for iron and steel is prepared with ethyl borate 20-25 weight portions, silicone resin 15-25 weight portions, 5-10 wt% concentration polyvinyl butyal solution 5-10 weight portions, aluminum powder 15-20 weight portions, solvent 10-20 weight portions, and dispersant 1-2 weight portions. The present invention has three kinds of matter, including boric oxide, silicone resin and alumnia layer with reactive protection, melt film shielding protection and redox protection at high temperature separately combined, so that the paint has excellent high temperature iron and steel protecting function and capacity of reducing surface scale generating amount.

Description

technical field [0001] The invention relates to an anti-high temperature steel surface oxide skin coating. Used for protection of steel before heat treatment. It belongs to the technical field of paint. Background technique [0002] Usually, the steel surface will be accompanied by dust, oil, scale, rust layer, pollutant salt, or loose old paint film. Among them, scale is the most common but most easily overlooked part. Oxide scale is a layer of dense oxide layer produced when steel is forged and pressed at high temperature. It usually adheres relatively firmly, but it is brittle compared to steel itself. From the electrochemical analysis, the electrode potential of the oxide scale is 0.15-0.20V higher than that of iron. In the corrosive medium, iron corrodes before the oxide scale, especially when there is a large amount of oxide scale, a large amount of oxide scale is the cathode, and a small amount of oxide scale is the cathode. The exposed iron becomes a small anode, ...

AI Technical Summary

Problems solved by technology

Usually, the oxide scale must be completely removed before the steel surface is painted, and many steel surface coatings are carried out before the oxide scale is completely removed, resulting in poor coating quality and greatly shortened coating life.