Procedure for obtaining an aqueous composition, acided to form a coating of zinc phosphate on a metallic surface (Machine-translation by Google Translate, not legally binding)

摘要

Procedure for the obtaining of an acid aqueous composition of coating, based on zinc phosphate. Combined among these compounds containing zinc, phosphate and nitrite ions, and mixed with water in order to obtain the following concentrations: from 4 to 10 n/m cubicos of zinc, from 50 to 400 n/m cubicos of ion phosphate and from 0.1 to 2 n/m cubicos of ion nitrito. Optionally it can be incorporated to the solution of chloric acid or a chlorate of alkaline or ammonium metals to achieve a concentration of ion crorato comprised between 20 and 50 n/m cubic. As zinc ion source can be used zinc oxide, zinc carbonate and zinc nitrate; ion phosphate is provided by phosphoric acid, alkaline metal phosphate, zinc phosphate and nickel phosphate, and ion nitrite is supplied by nitrites of alkaline metals or by ammonium nitrite. Of employment as a layer of lower cover or of primer for paint films applied by anionic electrolytic deposition. (Machine-translation by Google Translate, not legally binding)