Corrosion resistant anodized aluminum

Details Corrosion resistant anodized aluminum Corrosion resistant anodized aluminum

1993-04-21

1994-10-25

Silverberg, Sam

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Forming nonelectrolytic coating after forming nonmetal...

205203, 205204, 148272, 106 1421, C23F 1118, C23C 2266

Patent

active

053586239

ABSTRACT:
A method of protecting a non-chromium anodized aluminum or aluminum alloy by rinsing the anodized aluminum or aluminum alloy with warm water to warm the anodized aluminum or aluminum alloy, coating the warm anodized aluminum or aluminum alloy with, a non-chromium alkali metal permanganate solution having a pH in the range of about 4.0 to about 8.0, and a temperature of from about 170.degree. F. to about 212.degree. F., and forming a non-chromium mixed metal oxide coating of aluminum and manganese oxides on the anodized aluminum or aluminum alloy.

REFERENCES:
patent: 1971240 (1934-08-01), Tosterud
patent: 1988012 (1935-01-01), Mason
patent: 4755224 (1988-07-01), Bibber
patent: 4878963 (1989-11-01), Bibber

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