Aluminium and aluminium alloy having corrosion-resistant protect

Details Aluminium and aluminium alloy having corrosion-resistant protect Aluminium and aluminium alloy having corrosion-resistant protect

1989-07-28

1991-10-08

Ryan, Patrick J.

Stock material or miscellaneous articles

Surface property or characteristic of web, sheet or block

428457, 428913, 428 64, 428 65, 204 33, 204 58, 346 76L, 3461351, 369288, B37B 900

Patent

active

050553569

ABSTRACT:
A body, particularly a thin layer, of aluminium or aluminium alloy is given a corrosion-resistant bright dense barrier-type protective layer. The layer has a thickness in the range 50 to 500 nm and comprises aluminium oxide and a chelate complex of aluminium and at least one organic chelating compound. The layer is formed by contacting the surface with a solution of the chelating compound of pH 2 to 7 and, optionally, performing oxidative electrolysis.

REFERENCES:
patent: 3615888 (1971-10-01), Wystrach
patent: 3615889 (1971-10-01), Rauch
patent: 4431268 (1984-02-01), Ohno et al.
patent: 4457598 (1984-07-01), Shimabukuro et al.
patent: 4507179 (1985-03-01), Yoshida
patent: 4578156 (1986-03-01), Plazter
Industrial & Engineering Chemistry, Product Research & Development, vol. 25, No. 2, 6/86, Corrosion Inhibitor Orientation on Steel, Salensky et al.
Chemical Abstracts, vol. 107, No. 6, Aug. 1987, p. 558, Abs. No. 48253q, Columbus Ohio.

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