Compositions for use in chromium plating

Details Compositions for use in chromium plating Compositions for use in chromium plating

1975-12-02

1977-10-18

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204 43R, 204 51, C25D 306, C25D 356

Patent

active

040544940

ABSTRACT:
It is known to attempt to plate chromium from a solution containing trivalent chromium salts and organic complexants. The invention provides an aqueous chromium electroplating system containing trivalent chromium together with both a formate or acetate and a bromide. Optionally the solution also contains ammonium, borate, chloride, sulphate and alkali metal ions and a wetting agent. The invention has the advantage of providing a solution with commercially acceptable covering and throwing power whose effluent can easily be purified to acceptable standards.

REFERENCES:
patent: 1564414 (1925-12-01), Hoff
patent: 2458839 (1949-01-01), Dyer et al.
patent: 3108933 (1963-10-01), Johnson
patent: 3954574 (1976-05-01), Gyllenspetz et al.

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