Chemistry: electrical and wave energy – Processes and products
Patent
1981-02-03
1982-04-20
Tufariello, T.
Chemistry: electrical and wave energy
Processes and products
204 43Z, 204273, 204275, C25D 356, C25D 508, C25D 706, C25D 2110
Patent
active
043257909
ABSTRACT:
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 resistance 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/l, as converted into metallic cobalt, the chromium content in said electro-galvanizing bath within the range of from 0.1 to 1.5 g/l, as converted into metallic chromium, and the temperature of said electro-galvanizing bath within the range of from 35.degree. to 60.degree. 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.
REFERENCES:
patent: 4048381 (1977-09-01), Adaniya
patent: 4252866 (1981-02-01), Matsudo
patent: 4272334 (1981-06-01), Fukuda
Adaniya Takeshi
Ohmura Masaru
Nippon Kokan Kabushiki Kaisha
Tufariello T.
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