Bright chromium plating baths

Details Bright chromium plating baths Bright chromium plating baths

C - Chemistry, Metallurgy

25

D

204/35

C25D 3/04 (2006.01)

Patent

CA 1215670

-i- BRIGHT CHROMIUM PLATING BATHS ABSTRACT OF THE DISCLOSURE The invention provides a hexavalent chromium plating bath containing chromic acid, an iodine releasing compound and/or a bromine releasing compound such as iodate, perio- date, bromate or perbromate, and a carboxylate which is stable in the bath. Exemplary stable carboxylates include acetic acid, propionic acid, chloroacetic acid, trichloro- acetic acid, succinic acid, sulfoacetic acid, benzoic acid, picolinic acid, and nicotinic acid. Bright chromium deposits can be produced with these baths at high current efficiencies employing high temperatures with substantially no low current density etch.

402951

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