Title:
METAL SURFACE TREATMENT LIQUID AND SURFACE TREATMENT METHOD FOR METAL MATERIAL
Document Type and Number:
WIPO Patent Application WO/2011/010472
Kind Code:
A1
Abstract:
Disclosed is a means which enables the achievement of excellent coating film adhesion and excellent corrosion resistance in a coating step in a metal surface treatment method wherein a surface cleaning process (degreasing) and a coating base preparation process are carried out in a single step.
Specifically disclosed is a metal surface treatment liquid which is characterized by being an aqueous solution having a pH of 3-14, said aqueous solution containing 10-1000 ppm of Bi ions and 100-2000 ppm of trivalent Fe ions, with the value of [2 × (Bi ion concentration) + (trivalent Fe ion concentration)] being 500-3000 ppm, and also containing a chelating agent and a surfactant that are sufficient for solubilizing Bi and Fe.
Inventors:
ISHII HITOSHI (JP)
SATOMI NOBUHIKO (JP)
SATOMI NOBUHIKO (JP)
Application Number:
PCT/JP2010/004729
Publication Date:
January 27, 2011
Filing Date:
July 23, 2010
Export Citation:
Assignee:
NIHON PARKERIZING (JP)
ISHII HITOSHI (JP)
SATOMI NOBUHIKO (JP)
ISHII HITOSHI (JP)
SATOMI NOBUHIKO (JP)
International Classes:
C25D13/20; C23C22/10
Foreign References:
| JP2004218071A | 2004-08-05 | |||
| JP2000087253A | 2000-03-28 | |||
| JPS6169974A | 1986-04-10 |
Attorney, Agent or Firm:
ITOH, ATSUSHI (JP)
Atsushi Ito (JP)
Atsushi Ito (JP)
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