Electrodeposition of bright nickel-iron deposits
AssigneeOxy Metal Industries Corporation
InventorsRichard John Clauss, Robert Arnold Tremmel
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Abstract
The instant invention is directed to an aqueous bath for the electrodeposition of a bright iron-nickel alloy and to a process utilizing the same, the bath comprising iron ions, nickel ions, an iron complexing agent containing at least two complexing groups independently selected from the group consisting of carboxy and hydroxy provided at least one group is a carboxy group, and a reaction product of a polyamine and an alkylating or sulfonating agent, whereby there is achieved a marked improvement in the brightness of the electrodeposit as well as excellent leveling in both the high and low current density areas. Optionally, by the addition of acetylenic brighteners of a particular structural formula even further improved results may be obtained.
Claims15
An aqueous acidic bath suitable for the electrodeposition of a bright iron-nickel electrodeposit onto a substrate susceptable to corrosion, which comprises iron ions and nickel ions, the ratio of nickel ions to iron ions being from about 5 to about 50 to 1, about 0.5 to 10 g/l of an organic sulfo-oxygen compound, a bath soluble complexing agent in the amount of about 10 to 100 g/l which is a carboxylic acid having both carboxyl and hydroxyl groups and in addition, about 0.1 mg/l to 25 mg/l of a reaction product of a polyalkylene polyamine and an alkylating or sulfonating agent, said polyamine having a molecular weight of from about 300 to 24,000.
Dependencies are inferred from the claim text.