Chemistry: electrical and wave energy – Processes and products
Patent
1984-10-30
1985-09-17
Kaplan, G. L.
Chemistry: electrical and wave energy
Processes and products
204 27, 204 442, C25D 356, C25D 700
Patent
active
045419035
ABSTRACT:
Steel strips are electroplated with a Zn-Fe base alloy containing 10 to 30% by weight of iron in a chloride bath which contains zinc and ferrous chlorides to give a total concentration of zinc and ferrous ions of from 1.0 mol/l to the solubility limit with a weight ratio of Fe.sup.2+ /Zn.sup.2+ between 0.10 and 0.35, and chloride ions in a total concentration of at least 6.0 mol/l under electrolytic conditions: pH 1.0-6.0, current density 80-200 A/dm.sup.2, and relative flow velocity 30-200 m/min. The bath may further contain a polycarboxylic acid such as citric acid and a Zn-Fe-P alloy plating may be deposited when the bath further contains hypophosphorous acid.
REFERENCES:
patent: 4252866 (1981-02-01), Matsudo et al.
patent: 4407899 (1983-10-01), Hara et al.
patent: 4444629 (1984-04-01), Martin
Irie Toshio
Kimura Hajime
Kurokawa Shigeo
Kyono Kazuaki
Matsuda Akira
Kaplan G. L.
Kawasaki Steel Corporation
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