Aluminum based phosphate final rinse

Details Aluminum based phosphate final rinse Aluminum based phosphate final rinse

C - Chemistry, Metallurgy

23

C

C23C 22/83 (2006.01)

Patent

CA 2079456

A final rinse for a phosphatized metal surface includes a phosphoric acid solution including aluminum chlorohydrate. The aluminum chlorohydrate solution is applied at a concentration of about 100 to about 1500 ppm at a pH of 3 to about 4.5. The pH is obtained by controlling the concentration of the phosphoric acid. This is preferably used to coat previously phosphatized metal surfaces such as iron, steel, aluminum and galvanize.

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