C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
204/37
C25D 3/22 (2006.01)
Patent
CA 1103610
ZINC PLATING PROCESS ABSTRACT OF THE DISCLOSURE Zinc plating process comprising adding water-soluble, amphoteric polysulfone compounds having the formula (A) as set forth below and, optionally, aromatic aldehydes to a zinc plating bath of an alkali metal zincate type and subjecting the resulting bath to electrodeposition conditions. (A) Image wherein: R1 and R2 each independently represents a straight or branched chain alkyl group having from 1 to 4 carbon atoms or a 2-hydroxyethyl group, a is in the range of 0.03 to 0.5; b is in the range of 0.3 to 0.77; c is in the range of 0.2 to 0.4, provided that c is not greater than b x 0.8; and n is in the range of 5 to 100.
273497
Fujita Shigeru
Harada Susumu
Kaneda Toyohito
Murayama Koichi
Ueda Toshio
Fetherstonhaugh & Co.
Kabushiki Kaisha Japan Metal Finishing Company
Nitto Boseki Kabushiki Kaisha
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