Title:
SURFACE PRETREATMENT FLUID FOR THE METAL TO BE COATED BY CATIONIC ELECTRODEPOSITION
Document Type and Number:
WIPO Patent Application WO/2008/075738
Kind Code:
A1
Abstract:
The invention provides a zirconium ion containing surface pretreatment fluid
for the metal to be coated by cationic electrodeposition which makes it possible
to develop satisfactory throwing power in the electrodeposition and is excellent
in corrosion inhibition performance. The invention relates to a surface pretreatment
fluid for the metal to be coated by cationic electrodeposition which contains
zirconium ions and tin ions and has a pH of 1.5 to 6.5, wherein the zirconium ion
concentration is 10 to 10000ppm and the content ratio by mass of tin ion to zirconium
ion is 0.005 to 1. The fluid may further contain a polyamine, copper ion, fluoride
ion, or a chelate compound.
Inventors:
INBE TOSHIO (JP)
KAMEDA HIROSHI (JP)
KOLBERG THOMAS (DE)
KAMEDA HIROSHI (JP)
KOLBERG THOMAS (DE)
Application Number:
PCT/JP2007/074536
Publication Date:
June 26, 2008
Filing Date:
December 20, 2007
Export Citation:
Assignee:
NIPPON PAINT CO LTD (JP)
INBE TOSHIO (JP)
KAMEDA HIROSHI (JP)
KOLBERG THOMAS (DE)
INBE TOSHIO (JP)
KAMEDA HIROSHI (JP)
KOLBERG THOMAS (DE)
International Classes:
C23C22/06; C23C22/34; C23C28/00; C25D13/20
Foreign References:
| JPH07145486A | 1995-06-06 | |||
| JP2004218074A | 2004-08-05 | |||
| JP2004218070A | 2004-08-05 | |||
| JP2000038525A | 2000-02-08 |
Other References:
See also references of EP 2112251A4
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (25-8Higashi-ikebukuro 1-chome,Toshima-k, Tokyo 13, JP)
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