Chromium electroplating

Details Chromium electroplating Chromium electroplating

C - Chemistry, Metallurgy

25

D

204/35

C25D 3/06 (2006.01)

Patent

CA 1084441

CHROMIUM ELECTROPLATING ABSTRACT OF THE DISCLOSURE Trivalent chromium electroplating baths which have developed characteristic faults due to accumulation of trace metal contaminants are treated with just sufficient of a water soluble ferrocyanide to restore the bath to normal working order. The presence of any excess of trace metal or of ferrocyanide may be detected by causing the solution to permeate upwardly through a water permeable medium and contacting separate parts of the solution in the water permeable medium with a soluble ferrocyanide and an iron salt respectively. Typically a test paper impreg- nated at either end with two salts is employed.

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