Two-stage differential anodization process

Details Two-stage differential anodization process Two-stage differential anodization process

1980-06-30

1981-07-14

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204 56R, C25D 1112

Patent

active

042785138

ABSTRACT:
In a two-stage differential anodization of valve-metal pellets in which the second stage is carried out at a high voltage and with a different electrolyte than the first, underformed spots on the pellets are eliminated in the second stage by adding 0.01-1.0 wt. % of a nonionic surfactant to the second stage electrolyte.

REFERENCES:
patent: 3415722 (1968-12-01), Scheller et al.
patent: 4131520 (1978-12-01), Bernard et al.

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