Bright acid zinc electroplating baths

Details Bright acid zinc electroplating baths Bright acid zinc electroplating baths

1977-02-07

1978-06-06

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204DIG2, 252182, C25D 322

Patent

active

040935230

ABSTRACT:
This invention is directed to a brightening system for zinc deposited from an acid zinc chloride electrolyte containing potassium chloride as a conducting salt and boric acid as a buffer. The active brightener in the system is an aromatic aldehyde or ketone which is dispersed into the electrolyte by a wetting agent system consisting essentially of a mixture of a fatty acid imidiazole sulfonate and a fatty diaminobetaine carboxylate; assisted by a hydrotrope selected from the group consisting of alcohol ethers, cyclic alcohols, and aromatic sulfonates. In some cases, this brightening system can be augmented by the prior art nicotinic acid, or polyamine zinc brightener.

REFERENCES:
patent: 3729394 (1973-04-01), Hsu et al.
patent: 3730855 (1973-05-01), Poor et al.
patent: 3787297 (1974-01-01), Beckwith et al.
patent: 3928149 (1975-12-01), Steeg
patent: 3974045 (1976-08-01), Takahashi et al.
patent: 4007098 (1977-02-01), Rosenberg

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