C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
204/26
C25D 3/56 (2006.01) C25D 5/08 (2006.01) C25D 7/06 (2006.01) C25D 21/10 (2006.01)
Patent
CA 1155081
PROCESS FOR MANUFACTURING ELECTRO- GALVANIZED STEEL STRIP ABSTRACT OF THE DISCLOSURE In a process for manufacturing an electro-galvanized steel strip, which comprises: moving a steel strip in an acidic electro-galvanizing bath containing cobalt and chrominum in parallel with the plane of at least one anode plate to subject said steel strip to an electro-galvanizing treatment, thereby forming, on at least one surface of said steel strip, an electro-galvanized layer excellent in bare corrosion resist- ance and corrosion resistance after chromating; the improvement characterized by: keeping the cobalt content in said electro- galvanizing bath within the range of from 8 to 30 g/Q, as converted into metallic cobalt, the chromium content in said electro-galvanizing bath within the range of from 0.1 to 1.5 g/?, as converted into metallic chromium, and the temperature of said electro-galvanizing bath within the range of from 35 to 60°C; and, flowing said electro-galvanizing bath between said steel strip and said anode plate at a flow velocity of at least 0.35 m/sec in a direction at right angles to the travelling direction of said steel strip.
369856
Adaniya Takeshi
Ohmura Masaru
Macrae & Co.
Nippon Kokan Kabushiki Kaisha
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