C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
204/26
C25D 7/06 (2006.01) C25D 3/56 (2006.01)
Patent
CA 1155791
ABSTRACT OF THE INVENTION Steel sheet is electro-galvanized in an acidic, zinc sulfate and iron sulfate electro-galvanizing bath with a pH under 1.5 and containing from 20 to 90 wt.% iron, relative to the total amount of metals capable of being electro-deposited from the acidic electro-galvanizing bath, at a current density of 10 to 40 A/dm2, to form on the steel sheet an electro-galvanized layer weighing from 1 to 50 g/m2 per side and containing from 5 to 35 wt.% iron, relative to the total weight of the electro-galvanized layer. The electro-galvanized sheet has improved paint adhesion and corrosion properties. These properties can be further improved by incorporating from 0.01 to 10 wt.%, relative to the total weight of the electro-galvanized layer, nickel, chromium or copper in the electro-galvanized layer.
353473
Adaniya Takeshi
Matsudo Kazuo
Ohmura Masaru
Shoji Masahiro
Watanabe Tsutomu
Macrae & Co.
Nippon Kokan Kabushiki Kaisha
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