Title:
GALVANIZED STEEL SHEET HAVING SURFACE TREATMENT FILM, AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2015/080066
Kind Code:
A1
Abstract:
Provided is a galvanized steel sheet having a surface treatment film, wherein said galvanized steel sheet has (1) excellent resistance to darkening after being subjected to rigorous ironing such as continuous high-speed press forming, (2) excellent resistance to flake-like peeling after being subjected to rigorous ironing such as continuous high-speed press forming, and (3) resistance to blackening that is less dependent on the adhesion amount. This galvanized steel sheet having a surface treatment film includes: a galvanized steel sheet; and a surface treatment film including a first film on the galvanized steel sheet, and a second film on the first film. The first and second films are each obtained by: applying a surface treatment solution containing a zirconium carbonate compound (A), a phosphate compound (B), a tetraalkoxysilane (C), and a silane coupling agent (D) including an epoxy group; and heating and drying said solution. The first film contains a large amount of the phosphate compound (B), and the second film contains a small amount of the phosphate compound (B).
Inventors:
OKUMURA YUSUKE (JP)
OKAI KAZUHISA (JP)
IMOKAWA TORU (JP)
MATSUZAKI AKIRA (JP)
TANDOKORO KOHEI (JP)
HAMADA ETSUO (JP)
OKAI KAZUHISA (JP)
IMOKAWA TORU (JP)
MATSUZAKI AKIRA (JP)
TANDOKORO KOHEI (JP)
HAMADA ETSUO (JP)
Application Number:
PCT/JP2014/080990
Publication Date:
June 04, 2015
Filing Date:
November 18, 2014
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C23C22/07; C23C28/00
Domestic Patent References:
| WO2010070728A1 | 2010-06-24 |
Foreign References:
| JP2000248367A | 2000-09-12 | |||
| JP2006009065A | 2006-01-12 |
Attorney, Agent or Firm:
SUGIMURA, KENJI (JP)
Kenji Sugimura (JP)
Kenji Sugimura (JP)
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