Processes and compositions for the treatment of aluminum surface

Details Processes and compositions for the treatment of aluminum surface Processes and compositions for the treatment of aluminum surface

1983-07-29

1985-04-09

Silverberg, Sam

Metal treatment

Compositions

Heat treating

C23F 706

Patent

active

045099928

ABSTRACT:
A composition for forming paint-base coatings on aluminum comprising an aqueous solution having a pH of from about 9 to about 12.5 and containing an effective coating forming amount of a complexing agent which has at least one of a nitrogen atom with a lone pair of electrons and a carboxylate group, which solution is substantially free of components which inhibit the coating formation. Aluminum surfaces are treated with the this solution to form a paint-base coating having a thickness of at least about 0.05 g/m.sup.2 and, thereafter, a paint or similar siccative coating is applied to the surface without the prior application of chromate or other conventional paint-base coating forming materials.

REFERENCES:
patent: 2924539 (1960-02-01), Arndt
patent: 3284202 (1966-11-01), Leonard
patent: 3376143 (1968-04-01), Barkman

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