Electrodeposition of black chromium

Details Electrodeposition of black chromium Electrodeposition of black chromium

1979-04-19

1980-04-01

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

C25D 356

Patent

active

041960637

ABSTRACT:
An electrolyte solution and the method of using same for electrodeposition of black chromium on a substrate, said solution comprising water, trivalent chromium ions, ions of a metal selected from the group consisting of iron and cobalt, a weak complexing agent for the trivalent chromium ions, and phosphate ions. The preferred complexing agents are hypophosphite or formate.

REFERENCES:
patent: Re29749 (1978-08-01), Gyllenspetz et al.
patent: 2990343 (1961-06-01), Safranek
patent: 3620935 (1971-11-01), Willson
patent: 3917517 (1975-11-01), Jordan et al.

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