Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Patent
1991-02-21
1993-11-02
Silverberg, Sam
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
C23C 2212
Patent
active
052580792
ABSTRACT:
The present invention relates to a phosphating method and solution for forming on a metal surface a phosphate film, which are used for elevating coating finish and rust-preventive property when a product consisting essentially of steel and/or zinc-plated steel combined with an aluminum alloy is coated with cationic electrocoating.
The method and solution comprise that said metal surface is brought, to form a coating film, in contact with an aqueous phosphate solution which satisfies the following conditions with respect to the six kinds of ions contained. A total concentration of a sodium ion and a potassium ion is in a range of 2.0 to 15.0 (g/l). A total concentration of a manganese ion and a nickel ion is in a range of 1.0 to 5.0 (g/l). Concentration of a zinc ion is in a range of (1.6-0.02 T) to (2.5-0.02 T) (g/l). Concentration of a free F.sup.- ion is in a range of 8.0 T.sup.-1 to 20.0 T.sup.-1 (g/l), (here, T is temperature (.degree.C.) of a phosphating solution and in a range of 20 to 60).
Contact of the metal surface with the phosphate solution is carried out with a combined process of dipping treatment subsequently followed by spraying treatment.
REFERENCES:
patent: 1324460 (1973-07-01), Heller
patent: 4717431 (1988-01-01), Kanaster
patent: 4849031 (1989-07-01), Hauffe
patent: 5082511 (1992-01-01), Faring
EP0228151-Jul. 1987.
EP0381190 Aug. 1990.
Miyazaki Naoharu
Nakatsukasa Mikio
Yoshida Yuichi
Mazda Co., Ltd.
Silverberg Sam
LandOfFree
Method and treating solution for phosphating metal surfaces 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 and treating solution for phosphating metal surfaces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and treating solution for phosphating metal surfaces will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1755421