Use of hydroxy carboxylic acids as ductilizers for electroplatin

Details Use of hydroxy carboxylic acids as ductilizers for electroplatin Use of hydroxy carboxylic acids as ductilizers for electroplatin

1997-05-22

1998-12-29

Gorgos, Kathryn L.

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Treating process fluid by means other than agitation or...

205238, C25D 356, C25D 2118

Patent

active

058535560

ABSTRACT:
A process for tungsten alloy plating wherein a tungsten replenisher concentrate of tungsten ions pre-complexed with a hydroxy carboxylic acid is used for maintenance additions to the bath. A preferred additive includes from about 100 to about 120 g/l of tungsten ions complexed with from about 120 to about 220 g/l of citric acid. The process provides consistent cathode efficiency and produces ductile deposits of tungsten alloy electroplate.

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