Process for producing porous aluminum anode element

Details Process for producing porous aluminum anode element Process for producing porous aluminum anode element

1978-03-01

1979-02-20

Mack, John H.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

20412995, 204DIG9, C25F 304

Patent

active

041405994

ABSTRACT:
A porous aluminum anode element having an increased effective surface area is prepared by an electrolytic etching process using an etchant solution containing CrO.sub.4 .sup.-- in a higher concentration and a lower current density than those heretofore proposed. Currents of a digital signal type, such as a pulse current, or those of triangular, sawtooth, trapezoidal or staircase waveform, are preferred.

REFERENCES:
patent: 3284326 (1966-11-01), Martin
patent: 3477929 (1969-11-01), Namikata et al.
patent: 3520788 (1970-07-01), Paehr
patent: 3887447 (1975-06-01), Sheasby et al.

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