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Title: Bright acid zinc electroplating baths
Claims: What we claim is: 1. The method of electroplating a bright zinc deposit from an aqueous acid chloride electrolyte containing potassium chloride as the conducting salt and boric acid as the buffer; by means of an aromatic aldehyde or ketone brightener that is dispersed into the electrolyte by means of a mixture of, 1- a fatty imidazole sulfonate, 2- a fatty amido betaine and 3- a hydrotropic coupling agent selected from the group consiting of cyclic alcohols, glycol ethers and aromatic sulfonates that are not wetting agents. 2. The method of electroplating a bright zinc deposit from an aqueous acid zinc chloride electrolyte containing potassium chloride as the conducting salt and boric acid as the buffer; by means of an aromatic carbonyl compound selected from the group consisting of benzaldehyde, chlorobenzaldehyde and benzal acetone, said aromatic carbonyl compound being dispersed into the electrolyte by means of a mixture of 1- a fatty imidazole sulfonate 2- a fatty amido propyl dimethyl amino acetic acid and 3- a hydrotropic coupling agent selected from the group consisting of cyclic alcohols, glycol ethers, and aromatic sulfonates that are not wetting agents. 3. The method of electroplating a bright zinc deposit from an aqueous acid zinc chloride electrolyte according to claim 2 in which the aromatic carbonyl compound is 1 to 2 g/l of benzaldehyde; the fatty imidazole sulfonate is the heptadecyl benzimidazole sulfonate at 1 to 2 g/l and the fatty betaine is cocoa amido propyl dimethyl amino acetic acid at 5 to 15 g/l. 4. A mixture of addition agents that will produce a bright zinc deposit of an aqueous acid zinc chloride bath; said mixture consisting essentially of an aromatic aldehyde or ketone that is held in solution by means of a fatty imidazole sulfonate, a fatty amido betaine and a hydrotrope selected from the group consisting of cyclic alcohols, glycol ethers, and aromatic sulfonates that are not wetting agents. 5. The method of electroplating a bright zinc deposit from an aqueous acid zinc chloride electrolyte containing potassium chloride as the conducting salt and boric acid as the buffer; by means of an aromatic carbonyl brightening agent dispersed into the bath by a fatty diamino wetting agent augmented by a hydrotropic coupling agent selected from the group consisting of cyclic alcohols, glycol ethers, and aromatic sulfonates that are not wetting agents. 6. The method of electroplating a bright zinc deposit from an aqueous acid zinc chloride electrolyte containg potassium chloride as the conducting salt and boric acid as the buffer; by means of an aromatic carbonyl brightening agent dispersed into the bath by a fatty diamino wetting agent augmented by a hydroptropic coupling agent selected from the group consisting of cyclic alcohols, glycol ethers, and aromatic sulfonates that are not wetting agents assisted by the added brightening action of a nicotinic acid base as an auxiliary brightener. 7. The method of electroplating a bright zinc deposit from an aqueous acid zinc chloride electrolyte containing potassium chloride as the conducting salt and boric acid as the buffer; by means of an aromatic carbonyl brightening agent dispersed into the bath by a fatty diamino wetting agent augmented by a hydrotropic coupling agent selected from the group consisting of cyclic alcohols, glycol ethers, and aromatic sulfonates that are not wetting agents and assisted by the brightening action of a cationic polyamine polymer. 8. The method of electroplating a bright zinc deposit from an aqueous acid zinc chloride electrolyte; by means of an aromatic carbonyl brightening agent, said carbonyl compound being dispersed into the bath by means of a mixture of 1) a fatty imidazole sulfonate, 2) a fatty amidopropyl dimethyl amino acetic acid, and 3) a hydrotropic coupling agent selected from the group consisting of cyclic alcohols, glycol ethers, and aromatic sulfonates that are not wetting agents. Other info: 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:
Other Refs: Primary Examiner: Kaplan, G. L. Assistant Examiner: Attorney: |
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