Method for anodizing valve metals

Details Method for anodizing valve metals Method for anodizing valve metals

1997-10-10

1998-11-17

Gorgos, Kathryn

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Forming nonmetal coating

205318, 205332, C25D 1126

Patent

active

058371214

ABSTRACT:
An electrolytic solution comprising glycerine and dibasic potassium phosphate. The electrolytic solution has a water content of less than 1000 ppm and is prepared by mixing the glycerine and the dibasic potassium phosphate and then heating to about 150.degree. to 180.degree. C. for about 1 to 12 hours. A method of anodizing a metal comprising forming a film on the metal with an electrolytic solution comprising glycerine and dibasic potassium phosphate. The metal is preferably a valve metal, such as tantalum, and the film is formed at a temperature of 150.degree. C. or higher.

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Melody et al., "An Improved Series of Electrolytes for Use in the Anodization of Tantalum Capacitor Anodes," Presented at the Capacitor and Resistor Technology Symposium (C.A.R.T.S. '92), Mar. 17, 1992, pp. 1-11.

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