AC Etching of aluminum capacitor foil

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

1981-05-20

1982-06-01

Tufariello, T.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041294, 20412995, C25F 304, C25F 314

Patent

active

043326510

ABSTRACT:
Aluminum capacitor foil is etched in a bath at 30.degree. to 45.degree. C. containing 0.5 to 1.8 M hydrochloric acid, 0.05 to 0.3 M phosphoric acid, 0.2 to 0.5 aluminum chloride and 0.09 to 1.0 M alkali or alkaline earth metal chloride while being subjected to alternating current at 15 to 36 Hz frequency.

REFERENCES:
patent: 2336846 (1943-12-01), Clark
patent: 2598043 (1952-05-01), Eichner
patent: 3249523 (1966-05-01), Post et al.
patent: 3887447 (1975-06-01), Sheasby et al.
patent: 4276129 (1981-06-01), Kanzki et al.

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