Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Coating predominantly single metal or alloy substrate of...
Patent
1991-01-25
1993-10-19
Niebling, John
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Coating predominantly single metal or alloy substrate of...
205316, 205320, 205333, C25D 548
Patent
active
052542386
ABSTRACT:
A treating solution for forming a hydroxide film on each surface of zinc-plated steel plates by cathodic electrolysis is here disclosed which comprises (a) 0.2 to 50 g/l of one or more metal ions selected from the group consisting of Mg.sup.2+, Cr.sup.3+, Ca.sup.2+, Ni.sup.2+, Co.sup.2+ and Al.sup.3+, and (b) 0.1 to 50 g/l of one or more oxidizing agents selected from the group consisting of nitrate ions, nitrite ions, chlorate ions, bromate ions and hydrogen peroxide. A process for the surface treatment of the zinc-plated steel plates by the use of this treating solution is also disclosed.
REFERENCES:
patent: 3214355 (1965-10-01), Kandler
patent: 4957594 (1990-09-01), Yamazaki et al.
Ishii Hitoshi
Miyawaki Toshi
Bolam Brian M.
Niebling John
Nihon Parkerizing Co. Ltd.
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