Phosphate coatings for metal surfaces

Details Phosphate coatings for metal surfaces Phosphate coatings for metal surfaces

C - Chemistry, Metallurgy

23

C

148/17, 204/97.0

C23C 22/18 (2006.01) C23C 22/36 (2006.01) C23C 22/73 (2006.01)

Patent

CA 1199857

ABSTRACT OF THE DISCLOSURE Processes and solutions for phosphating metal surfaces. The solutions are acidic aqueous phosphate solutions containing a) from 0.1 to 2 g/l of zinc ion; b) from 5 to 50 g/l of phosphate ion; c) from 0.2 to 4 g/l of manganese ion; d) at least 0.05 g/l of fluoride ion; and e) a phosphating accelerator. The metal surface phosphated with the solution is suitable for electrocoating.

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