Chemistry: electrical and wave energy – Processes and products – Electrophoresis or electro-osmosis processes and electrolyte...
Patent
1987-06-18
1988-01-05
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
Electrophoresis or electro-osmosis processes and electrolyte...
204 53, 204 541, C25D 358
Patent
active
047174609
ABSTRACT:
Baths and methods for electroplating tin or tin-lead alloys wherein the formation of tetravalent tin and stannic oxide sludge is reduced or prevented. These baths contain a soluble divalent tin compound, a soluble alkyl or alkylol sulfonic acid at least one wetting agent, and a hydroxyl phenyl compound reducing agent. Other compounds may be added to the bath for improving its performance during electroplating.
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Nobel Fred I.
Ostrow Barnet D.
Schram David N.
Andrews R. L.
Lea-Ronal, Inc.
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