Producing hydrous oxide of controlled thickness on aluminum capa

Details Producing hydrous oxide of controlled thickness on aluminum capa Producing hydrous oxide of controlled thickness on aluminum capa

1979-08-09

1981-02-24

Kendall, Ralph S.

Metal treatment

Compositions

Heat treating

204 33, 204 38A, C23F 706

Patent

active

042525756

ABSTRACT:
The thickness of a hydrous oxide layer on aluminum capacitor foil is controlled by producing the oxide in a hot, dilute borate solution with a pH of about 6, prior to anodization of the foil.

REFERENCES:
patent: 2018694 (1935-10-01), Wetherbee
patent: 2079516 (1937-05-01), Lilienfeld
patent: 2404824 (1946-07-01), Booe
patent: 2868702 (1959-01-01), Brennan
patent: 3600245 (1971-08-01), Gates
D. Altenpohl, Aluminum 33 #2, pp. 78-91 (Feb. 1957), Eng. transl.
W. J. Bernard and J.J. Randall, J. Electrochem Soc., 108#9, pp. 822-825, (Sep. 1961).

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