Composition and process for high speed bright silver plating

Details Composition and process for high speed bright silver plating Composition and process for high speed bright silver plating

C - Chemistry, Metallurgy

25

D

204/29

C25D 3/46 (2006.01) C25D 3/64 (2006.01)

Patent

CA 1181715

ABSTRACT OF THE DISCLOSURE An electrolytic bath for the production of mirror bright silver deposits comprising an alkali metal silver cyanide as the source of silver; boric acid, citric acid, alkali or ammonium metal salts of such acids, as well as mixtures thereof; selenious acid or alkali metal selenite; and, in certain preferred baths, antimony in the form Or an alkali metal carboxylic acid salt. The bath is designed to be operated at high current densities of from 200 to 5000 ASF, i.e. about 20 to 500 ASD. The process of utilizing such an electrolytic bath is also disclosed and claimed.

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