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US 4,285,802 AGranted
Zinc-nickel alloy electroplating bath
OwnerGeorge B. Rynneinventor
Life of this patent
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Abstract
An aqueous bath for producing a bright zinc-nickel alloy electroplated deposit. The bath includes a soluble zinc containing compound, a soluble nickel salt, an ammoniated electrolyte, a non-ammoniated electrolyte, a non-ionic polyoxyalkylated surfactant and an aromatic aldehyde. The bath can also be ammonia-free, wherein the bath also includes boric acid and an aromatic carbonyl compound.
Claims10
An aqueous bath for producing a bright zinc-nickel alloy electroplated deposit having superior corrosion resistance, said bath comprising, on a per liter basis:
- (a) a soluble zinc containing compound providing 10-100 grams of zinc as metal and selected from the group consisting of zinc chloride and zinc oxide;
- (b) a soluble nickel salt providing 0.01-10 grams of nickel as a metal, said soluble nickel salt being nickel chloride;
- (c) an ammoniated electrolyte providing 1-10 grams of ammonium ions, said ammoniated electrolyte being ammonium chloride;
- (d) a non-ammoniated electrolyte selected from the group consisting of potassium chloride and sodium chloride, said non-ammoniated electrolytes providing 25-300 grams of chloride ions;
- (e) 5-50 grams of a non-ionic polyoxy alkylated surfactant selected from the group consisting of:
- nonionic block copolymers of ethylene oxide and linear alcohols having the following structural formula;
- ##STR3## wherein x is an integer from 9 to 15 and n is an integer from 10 to 50;
- nonionic block copolymers of ethylene oxide and phenol alcohols having the following structural formula;
- ##STR4## wherein x is an integer from 6 to 15 and n is an integer from 10 to 50;
- nonionic block copolymers of ethylene oxide and monoethanol amine coconut fatty acid condensate having a total molecular weight of about 475 and an ethylene oxide content of about 46 weight percent thereof;
- alkoxylated alkyl phenols, alkoxylated alkyl naphthols, alkoxylated aliphatic monohydric alcohols, alkoxylated polyoxpropylene glycols, alkoxylated 2,4,7,9-tetramethyl-5-decyne-4,7-diol, alkoxylated ethylene diamine, alkoxylated fatty acids, alkoxylated amides, alkoxylated esters;
- and
- (f) 0.05-4 grams of an aromatic aldehyde, said bath having a pH of 3.0-6.9.
10 more elements
An aqueous bath for producing a bright zinc-nickel alloy electroplated deposit having superior corrosion resistance, said bath comprising, on a per liter basis:
- (a) a soluble zinc containing compound providing 1-100 grams of zinc as metal and selected from the group consisting of zinc chloride and zinc oxide;
- (b) a soluble nickel salt providing 0.01-10 grams of nickel as a metal, said soluble nickel salt being nickel chloride;
- (c) a non-ammoniated electrolyte selected from the group consisting of potassium chloride and sodium chloride, said non-ammoniated electrolyte providing 25-300 grams of chloride ions;
- (d) 5-50 grams of a non-ionic polyoxyalkylated surfactant selected from the group consisting of:
- nonionic block copolymers of ethylene oxide and linear alcohols having the following structural formula:
- ##STR5## wherein x is an integer from 9 to 15 and n is an integer from 10 to 50;
- nonionic block copolymers of ethylene oxide and phenol alcohols having the following structural formula:
- ##STR6## wherein x is an integer from 6 to 15 and n is an integer from 10 to 50;
- nonionic block copolymers of ethylene oxide and monoethanol amine coconut fatty acid condensate having a total molecular weight of about 475 and an ethylene oxide content of about 46 weight percent thereof;
- and
- alkoxylated alkyl phenols, alkoxylated alkyl naphthols, alkoxylated aliphatic monohydric alcohols, alkoxylated polyoxypropylene glycols, alkoxylated 2,4,7,9-tetramethyl-5-decyne-4,7-diol, alkoxylated ethylene diamine, alkoxylated fatty acids, alkoxylated amides, alkoxylated esters;
- and
- (e) 0.05-4 grams of an aromatic aldehyde;
- (f) 10-40 grams of boric acid;
- and
- (g) 1.5 to 15 grams of an aromatic carbonyl compound selected from the group consisting of benzoic acid, nicotinic acid and cinnamic acid, said bath having a pH of 3.0-6.9.
13 more elements
Dependencies are inferred from the claim text.