Electroplating solution including trivalent chromium,...

Details Electroplating solution including trivalent chromium,... Electroplating solution including trivalent chromium,...

C - Chemistry, Metallurgy

25

D

204/35

C25D 3/06 (2006.01)

Patent

CA 1132940

Case U-10686 TRIVALENT CHROMIUM PLATING BATH COMPOSITION AND PROCESS ABSTRACT OF THE DISCLOSURE An aqueous acid trivalent chromium electroplating solution and process for forming chromium platings employing a bath containing trivalent chromium, formate ions as a com- plexing agent, and a bath soluble reducing agent selected from the group consisting of formaldehyde, glyoxal, formalde- hyde bisulfite, glyoxal di-bisulfite, sodium formaldehyde sul- foxylate, and mixtures thereof. The bath may additionally and preferably contain controlled amounts of conductivity salts, ammonium anions and a buffering agent to maintain the pH with- in the desired range.

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