Surface treating agent before coating

Details Surface treating agent before coating Surface treating agent before coating

C - Chemistry, Metallurgy

23

C

148/17, 117/95,

C23C 22/07 (2006.01) C23C 22/23 (2006.01) C23C 22/36 (2006.01) C23C 22/82 (2006.01) C23C 28/00 (2006.01) C25D 13/20 (2006.01)

Patent

CA 2000826

- 12 - ABSTRACT Disclosed is a surface treating agent which improves the adhesive properties between a metal surface and a paint layer thereon. The surface treating agent is an acidic aqueous solution comprising zinc ion, nickel ion and phosphate ion, characterized by adding a cyclic metaphosphate thereto in the form of (MPO3)n wherein M represents a metal atom and n is an integer of at least 4 in a concentration of 20 to 600 mg/1.

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