Formation of zinc phosphate coating on metallic surface

Details Formation of zinc phosphate coating on metallic surface Formation of zinc phosphate coating on metallic surface

C - Chemistry, Metallurgy

25

D

148/17, 204/97.0

C25D 9/02 (2006.01) C23C 22/13 (2006.01) C23C 22/14 (2006.01) C23C 22/18 (2006.01) C23C 22/22 (2006.01) C23C 22/36 (2006.01) C23C 22/76 (2006.01)

Patent

CA 1136522

-1- Abstract: An acidic aqueous zinc-containing coating solution containing about 0.4 to about 1 g/l of zinc, about 5 to about 40 g/l of phosphate, about 2 to about 5 g/l of chlorate, and about 0.01 to about 0.2 g/l of nitrite, and useful for forming on metal surfaces zinc phosphate coatings that exhibit excellent adhesion to a paint film and excellent corrosion resistance after painting when used as an undercoat for the cationic electrodeposition of a paint film, and a process for applying coating composition, including continuous spray or intermittent spray.

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