Electroplating baths for nickel, iron, cobalt and alloys thereof
AssigneeM&T Chemicals Inc.
InventorsKenneth W. Lemke, Maynard W. McNeil
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Abstract
An aqueous electroplating bath for nickel, cobalt, nickel-cobalt, nickel-iron, cobalt-iron or nickel-cobalt-iron is described which contains, as a brightening agent, a quaternary amine sulfobetaine of the formula ##STR1## wherein N.sup.+ is a heterocyclic tertiary amine group, R is a halogen or lower alkyl group, R' is a hydrogen, lower alkyl or R"C(O)--group R" is a lower alkyl group and a is 0-5. These brighteners may be prepared by the reaction of a heterocyclic tertiary amine with an alkali metal halohydrin sulfonate.
Claims7
A plating bath for the electrodeposition of metal comprising an aqueous solution of at least one metal salt selected from salts of nickel, iron and cobalt, characterized by the presence of a brightening agent of the formula ##STR3## wherein N.sup.+ is a heterocyclic tertiary amine group,
- R is a halogen or lower alkyl group,
- R' is hydrogen, lower alkyl or a R"C(O)--group,
- R" is a lower alkyl group and a is 0-5.
Dependencies are inferred from the claim text.