Electrolysis: processes – compositions used therein – and methods – Electrolytic coating – Depositing predominantly alloy coating
Patent
1992-03-11
1997-12-16
Gorgos, Kathryn L.
Electrolysis: processes, compositions used therein, and methods
Electrolytic coating
Depositing predominantly alloy coating
205252, 205299, 205302, 106 125, C25D 332, C25D 336
Patent
active
056980876
ABSTRACT:
It now has been found that a smooth and level deposit of tin, lead or tin-lead alloy can be deposited on a substrate from an aqueous plating bath which comprises (A) at least one bath-soluble metal salt selected from the group consisting of a stannous salt, a lead salt, or a mixture of stannous and lead salts, (B) an acid selected from the group consisting of sulfuric or fluoboric acid; and (C) an effective amount of at least one soluble bismuth salt of an alkane sulfonic acid or an alkanol sulfonic acid. Optionally, the aqueous plating bath may further comprise (D) at least one surfactant.
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Gorgos Kathryn L.
Mayekar Kishor
McGean-Rohco, Inc.
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