C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
204/24.95
C25D 11/36 (2006.01) C23C 22/78 (2006.01) C25D 7/06 (2006.01) C25F 1/00 (2006.01)
Patent
CA 1246487
ABSTRACT OF THE DISCLOSURE A steel strip having an excellent phosphate-coating property is produced by subjecting at least one surface of the steel strip to electrolytic treatment in which the steel strip serves as an anode and the steel strip surface is brought into contact with an aqueous solution containing at least one phosphate selected from the group consisting of alkali metal phosphates and ammonium phosphate and having a concentration of phosphate anions of 0.05 mole/? or more and a pH of from 4 to 7, at an anode current density of 2 A/dm2 or more, to an extent that A phosphate surface layer is formed in an amount of 0.0001 to 0.05 g/m2 on the metal strip surface.
426013
Hotta Wataru
Miyauchi Yujiro
Shindow Yoshio
Tsutsumi Masaya
Goudreau Gage Dubuc
Nippon Steel Corporation
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