Zinc-nickel alloy electroplating bath

Claim 2

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.

Claim 3

The bath of claim 1, wherein said ammoniated electrolyte provides 1-10 grams of ammonium ions.

Claim 4

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.

Claim 5

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.

Claim 6

The bath of claims 1 or 3, wherein said soluble zinc containing compound provides 50-80 grams of zinc as a metal.

Claim 7

The bath of claims 1 or 3, wherein said soluble nickel salt provides 3-5 grams of nickel as a metal.

Claim 8

The bath of claim 3, wherein said non-ammoniated electrolyte provides 200-250 grams of chloride ions.

Claim 9

The bath of claims 1 or 3, wherein said nonionic polyoyalkylate surfactant is present in an amount between 10 and 15 grams.

Claim 10

The bath of claims 1 or 3, wherein said aromatic aldehyde is present in an amount between 0.5 and 1.5 grams.

Claim 11

The bath of claim 3, wherein said boric acid is present in an amount between 3 and 4 grams.

Claim 12

A substrate having an electrodeposit the bath of claim 1 or 2 thereon, said electrodeposit comprising a nickel-zinc alloy electrodeposit having superior corrosion resistance, said electrodeposit comprising approximately 95% to 99.9% by weight zinc and approximately 0.1% to 5% by weight nickel as an alloy.