Continuous electrolyte coloring of a pre-anodised aluminum foil

Details Continuous electrolyte coloring of a pre-anodised aluminum foil Continuous electrolyte coloring of a pre-anodised aluminum foil

1975-07-28

1976-05-25

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204 35N, 204 58, C25D 1122

Patent

active

039590909

ABSTRACT:
Continuous process for anodizing and subsequent electrolytic coloring of an aluminium strip or foil with A.C. in which the strip after leaving the anodistaion unit passes through an aqueous acidic contacting electrolyte, e.g. dilute sulfuric acid, and then through the aqueous acidic coloring electrolyte containing metal ions and in which the A.C. source is connected to inert electrodes dipping in the contacting and in the coloring electrolyte respectively.

REFERENCES:
patent: 3079308 (1963-02-01), Ramirez et al.
patent: 3759801 (1973-09-01), Patrie et al.
patent: 3766043 (1973-10-01), Herrmann et al.

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