Colorless sealing layers for anodized aluminum surfaces

Details Colorless sealing layers for anodized aluminum surfaces Colorless sealing layers for anodized aluminum surfaces

1987-04-14

1988-07-12

Silverberg, Sam

Metal treatment

Compositions

Heat treating

148 627, C23C 2284, C25D 1124

Patent

active

047567716

ABSTRACT:
A process and composition for producing colorless, cold-sealed, anodized aluminum or aluminum alloy surfaces. The composition comprises an aqueous solution containing nickel ions and a solution of at least one azo or azo metal dye, the colors imparted by the nickel ions and dye offsetting each other.

REFERENCES:
patent: 2927872 (1960-03-01), Cohn
patent: 3012917 (1961-12-01), Riou et al.
patent: 3767474 (1973-10-01), Cohn
patent: 3874902 (1975-04-01), Andrus
Chemical Abstracts 87, 75493t, 1977.
Aluminium 47, No. 4 245-253 (1971).
Ullmanns Encyklopaedie der technischen Chemie, 1961, Urban & Schwarzenberg, Muechen-Berlin, p. 194 (translation enclosed).

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