Processes and compositions for the treatment of aluminum...

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

C - Chemistry, Metallurgy

23

F

148/23

C23F 7/06 (1980.01)

Patent

CA 1183070

ABSTRACT OF THE DISCLOSURE 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 this solution to form a paint-base coating having a thickness of at least about 0.05 g/m 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.

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