Process for anodizing aluminum for an aluminum electrolytic capa

Details Process for anodizing aluminum for an aluminum electrolytic capa Process for anodizing aluminum for an aluminum electrolytic capa

1984-04-02

1987-12-29

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204 585, 295701, C25D 1108

Patent

active

047159367

ABSTRACT:
An electrolyte capable of anodizing aluminum consists essentially of a solution of an amino acid having a pH of 5.5 to 8.5. The amino acid is preferably a 2-amino acid, more preferably a dicarboxylic acid, and specifically aspartic or glutamic acid. The electrolyte may be used to anodize aluminum foil to form a barrier layer oxide or as a fill electrolyte in aluminum electrolytic capacitors.

REFERENCES:
patent: 1266557 (1918-05-01), Coulson
patent: 2122392 (1938-06-01), Robinson et al.
patent: 2166180 (1939-07-01), Ruben
patent: 3524799 (1970-08-01), Dale
patent: 4152221 (1979-05-01), Schaedel
"Surface Treatment of Al" by Wernick et al., 3rd Ed., 1964, Robert Draper Ltd., p. 376.

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