Title: Bright acid zinc electroplating baths

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.

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Inventors: Henricks, John A. (Oak Park, IL, US)
Wild, Robert E. (Wheaton, IL, US)

Application Number: 766554
Filing Date: 1977-02-07
Publication_date: 1978-06-06
Assignee: Wild; Edward B. (Wheaton, IL)
Primary Class(es): 205/312 205/313, 205/314
Other Classes:
US Patent Ref:

3729394	Apr, 1973	Hsu et al.	204/55.
3730855	May, 1973	Poor et al.	204/55.
3787297	Jan, 1974	Beckwith et al.	204/55.
3928149	Dec, 1975	Steeg	204/55.
3974045	Aug, 1976	Takahashi et al.	204/55.
4007098	Feb, 1977	Rosenberg	204/55.

Other Refs:
Primary Examiner: Kaplan, G. L.
Assistant Examiner:
Attorney: