Method for treating metal surface with zinc phosphate

Details Method for treating metal surface with zinc phosphate Method for treating metal surface with zinc phosphate

C - Chemistry, Metallurgy

23

C

C23C 22/36 (2006.01)

Patent

CA 2068690

ABSTRACT OF THE DISCLOSURE A method for treating a metal surface with zinc phosphate of this invention can treat an iron based surface, a zinc-based surface, an aluminum-based surface as well as a metal surface having two kinds or more of these surfaces with the same zinc phosphate treating solution, and even if treating times increases, the method makes it possible to form a coating film having superior adhesion and high corrosion resistance under a stable condition, and also, it prevents a precipitate formed by a metal ion eluted from a metal surface to be treated, especially, by an aluminum ion. A complex fluoride compound contained in said zinc phosphate treating solution of coming in contact with a metal surface is added so that a concentration ( unit: g/l ) converted into at least one of a hexafluorosilicic acid group ( SiF62- ) and a tetrafluoroboric acid group ( BF4 - ), with an aluminum ion concentration ( unit: g/l ) contained in said treating solution, is satisfactory for the following equation (I). 3.0 ? [SiF62-] + ? [BF4- ] - 8 [Al3+] ? 0.1 :(I)

Affiliated with

Also associated with

Rating

Method for treating metal surface with zinc phosphate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for treating metal surface with zinc phosphate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for treating metal surface with zinc phosphate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1448946