Surface treatment of aluminum or aluminum alloys

Details Surface treatment of aluminum or aluminum alloys Surface treatment of aluminum or aluminum alloys

1985-03-21

1987-04-21

Chapman, Terryence

Chemistry: electrical and wave energy

Processes and products

148 627, 204 383, 204 42, C25D 1106

Patent

active

046594396

ABSTRACT:
A white or grayish white substance can be formed by dipping, in the first step, aluminum or an aluminum alloy having an anodically oxidized film in a first solution containing a specific salt or electrolyzing with said first solution, thereby causing the product from this salt to enter into the micropore of said film and then, in the subsequent second step, dipping the product from the first step in a second solution containing a substance which reacts with the product from the salt to be converted into a white or grayish white compound or electrolyzing with said second solution.

REFERENCES:
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patent: 3852124 (1974-12-01), Fassell
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patent: 4024039 (1977-05-01), Yoshida et al.
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patent: 4230539 (1980-10-01), Saruwatari et al.
patent: 4251330 (1981-02-01), Sheasby et al.
patent: 4413049 (1983-11-01), Beaudet et al.

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