Method of electroplating an adherent chromium electrodeposit on

Details Method of electroplating an adherent chromium electrodeposit on Method of electroplating an adherent chromium electrodeposit on

1986-11-12

1988-03-15

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204 51, C25D 512

Patent

active

047311673

ABSTRACT:
What is described herein is an improved method of electroplating an adherent chromium deposit on a chromium substrate. The process is characterized by chemically oxidizing the chromium substrate before starting the electrodeposition of chromium thereon. A suitable chemical oxidizing agent is hydrogen ion, which can be furnished by a dilute acid solution. In this invention, the acid is characterized by being destroyed in the plating bath, if dragged therein. Suitable acids include oxalic and citric acids. The process is applicable to any chromium electroplating bath, including high energy efficient chromium baths, such as HEEF-40 baths, which are presently in commercial use.

REFERENCES:
patent: 1942356 (1934-01-01), Fink et al.
"Cr. Plating" Finshing Publs., Ltd., Teddington, Eng. 1980, pp. 147-148, Weiner & Walmsley.

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