Anodic aluminium oxide film and method of forming it

Details Anodic aluminium oxide film and method of forming it Anodic aluminium oxide film and method of forming it

1985-10-31

1987-07-21

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

C25D 1108

Patent

active

046816682

ABSTRACT:
An anodic oxide film is formed on aluminium strip by continuously passing the strip through a phosphoric acid electrolyte at from 25.degree. C. to 80.degree. C., the contact time between the strip and the electrolyte being not more than 15 seconds during which time the strip is anodized at a current density of at least 250 A/m.sup.2. In the resulting film, the pores are enlarged so that the effected surface area is increased. The film forms an excellent substrate for lacquer, paint, or adhesive.

REFERENCES:
patent: 3909387 (1975-09-01), Kolic
patent: 4196060 (1980-04-01), Patrie
patent: 4566952 (1986-01-01), Sprintschnik

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