Process for continuously anodizing strips or wires of aluminum

Details Process for continuously anodizing strips or wires of aluminum Process for continuously anodizing strips or wires of aluminum

1996-03-05

1997-12-02

Gorgos, Kathryn L.

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Coating moving substrate

205153, 205229, 205318, 205319, 205324, 205328, C25D 706, C25D 548, C25D 902, C25D 1104

Patent

active

056932081

ABSTRACT:
A process for producing an oxide layer with a pore structure on the surface of a strip or wire of aluminum or an aluminum alloy is such that the strip or wire is passed continuously through an electrolyte and simultaneously anodized under conditions that create pores and at an anodizing voltage creating the desired thickness of oxide layer. In a first stage of the process, in order to form a fine pore structure, the anodizing voltage is set at an initial level (U.sub.1) and subsequently, in a second stage to form a coarser pore structure, raised to a final level (U.sub.2) required to reach the desired thickness of oxide layer.

REFERENCES:
patent: 1771910 (1930-07-01), Bengough et al.
patent: 3020219 (1962-02-01), Franklin et al.
patent: 4566952 (1986-01-01), Sprintschnik et al.
patent: 5078845 (1992-01-01), Kunugihara et al.
patent: 5566952 (1986-01-01), Sprintschnik et al.

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