Aluminum treatment

Details Aluminum treatment Aluminum treatment

C - Chemistry, Metallurgy

23

C

148/16

C23C 22/66 (2006.01)

Patent

CA 1112135

ALUMINUM TREATMENT ABSTRACT OF THE DISCLOSURE A chromium-free treatment for aluminum imparts corrosion resistance and paint receptivity to the surface. The process is sequential and includes a first contact with an aqueous alkaline solution (pH above 10) containing complexed iron ion, water rinsing, and then contact with an aqueous acidic organic tannin-containing composition.

300036

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