Baths and additives for the electrodeposition of bright zinc

Details Baths and additives for the electrodeposition of bright zinc Baths and additives for the electrodeposition of bright zinc

1976-10-26

1977-09-20

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204DIG2, C25D 322

Patent

active

040495108

ABSTRACT:
A zinc brightener additive comprises a polymeric amine selected from the class consisting of a linear aliphatic amine polymer, an aminated polyepichlorohydrin, a polyethylenimine, and combinations thereof, and a propylene oxide-ethylene oxide block copolymer prepared by the sequential addition of propylene oxide followed by ethylene oxide, or vice versa, to a residue of an organic compound containing active hydrogen atoms such as propylene glycol or an amine base. Additionally, an aqueous acid electroplating bath containing the polymeric amine compound in combination with the propylene oxide-ethylene oxide and block copolymer provides bright, lustrous electrodepositions of zinc. Moreover, aromatic aldehydes and ketones may be utilized to provide extremely bright electrodepositions of zinc.

REFERENCES:
patent: 3729394 (1973-04-01), Hsu et al.
patent: 3928149 (1975-12-01), Steeg
patent: 3988219 (1976-10-01), Rosenberg
patent: 4007098 (1977-02-01), Rosenberg

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