Coating process for aluminum and aluminum alloy

Details Coating process for aluminum and aluminum alloy Coating process for aluminum and aluminum alloy

1973-09-24

1976-06-01

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

204 38E, 204 38R, C25D 500, C25D 1306, C25D 902

Patent

active

039606767

ABSTRACT:
A coating process for articles made of aluminum or aluminum alloy to form a composite coating which is excellent in adherent and anti-corrosive properties, in which the articles are treated in an aqueous solution of water-soluble oxyacid salts selected from the group consisting of silicates, borates, phosphates, chromates, molybdates, vanadates and permanganates with applying electric current to form a conversion coating layer on the aluminum surface, and are further treated with a water-soluble or water-dispersible coating composition to form a finish coat on the conversion coating layer particularly by dipping or electrodeposition.

REFERENCES:
patent: 2714066 (1955-07-01), Jewett et al.
patent: 3281243 (1966-10-01), Sorkin et al.
patent: 3622473 (1971-11-01), Ohta et al.
patent: 3658662 (1972-04-01), Casson et al.

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