Water-based environmentally-friendly antirust agent used before electrical steel decarburization and preparation method thereof

Abstract

The invention specifically relates to a water-based environmentally-friendly antirust agent used before electrical steel decarburization and a preparation method thereof. The technical scheme of the preparation method is as follows: mixing 0-10wt % of salicylhydroxamic acid, 0-10wt % of ethanol, 0-20wt % of urea, 0-20wt % of ammonia water, 0-10wt % of methenamine, 0-10wt % of ammonium carbonate and 20-80wt % of deionized water, uniformly dispersing in a stirrer, and packaging. The components of the water-based environmentally-friendly antirust agent do not contain chromate, nitrite and toxic and harmful ingredients so that the water-based environmentally-friendly antirust agent is environmentally-friendly; the prepared antirust agent is coated on the surface of the electrical steel and forms a protective layer on the metallic surface after dried by cold air or aired, thus inhibiting the corrosion of metal; when decarburization is carried out at above 750 DEG C, the surface layer gradually sublimes or breaks up into volatile gas; and the decarburization of the electrical steel is not affected under the condition that surface treatment is omitted before decarburization.

Description

technical field [0001] The invention belongs to the technical field of antirust agents for electrical steel. In particular, it relates to a water-based environment-friendly antirust agent for electrical steel before decarburization and a preparation method thereof. Background technique [0002] Electrical steel is a magnetic material widely used in electrical products such as engines, generators and transformers. Because silicon is easily oxidized, the electrical steel sheet is rusted and corroded. There are various anti-rust oils and anti-rust agents used in the process of electrical steel sheets and the anti-rust of finished products, but because a small amount of carbon content in steel will also affect the movement of magnetic domains and increase hysteresis loss, therefore, the steel must be The carbon content is reduced to below 50ppm. Decarburization generally occurs at N 2 —H 2 —H 2 It is carried out in an O atmosphere, or in a humid or high dew point exotherm...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at overcoming the defects of complex process of removing anti-rust oil or anti-rust agent before decarburization of existing electrical steel, and aims to provide an electrical steel with env

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