Degreasing and deoxidizing aluminum foil

Details Degreasing and deoxidizing aluminum foil Degreasing and deoxidizing aluminum foil

1981-10-22

1983-12-06

Kittle, John E.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

252136, 252 792, 252 794, 25217421, 25217422, 252DIG1, 134 3, 134 40, 134 41, 148 615R, C11D 708, C23G 102

Patent

active

044192592

ABSTRACT:
Aluminum foil, particularly for electrolytic capacitors, is degreased and deoxidized before processing by contacting the foil with a solution containing phosphoric acid and a nonionic surfactant. An agent corrosive to aluminum may be present. Contacting time is 20 to 240 seconds, and the temperature is 45.degree. to 85.degree. C. Preferably, 1.0-7.0 M phosphoric acid is used with 2 g/l of the nonionic surfactant and 1.0-3.0 g/l of corrosive agent.

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patent: 4124407 (1978-11-01), Binns
patent: 4124516 (1978-11-01), Skinozaki et al.

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