AC Etching of aluminum capacitor foil

Details AC Etching of aluminum capacitor foil AC Etching of aluminum capacitor foil

1980-12-12

1982-03-16

Tufariello, T.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

20412995, C25F 304, C25F 314

Patent

active

043199720

ABSTRACT:
Aluminum electrolytic capacitor foil is etched in a bath containing 0.75 to 1.8 M hydrochloric acid, 0.2 to 0.5 M aluminum chloride, and 0.05 to 0.4 M oxalic acid, while subjected to the action of alternating current of 16 to 36 Hz at 30 to 45.degree. C. in a single stage process.

REFERENCES:
patent: 1971761 (1934-08-01), Travers
patent: 2166990 (1939-07-01), Gray
patent: 3728237 (1973-04-01), Heijenbrok et al.
patent: 4198278 (1980-04-01), Mehada et al.
patent: 4276129 (1981-06-01), Kanzaki

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