Title:
HOT-DIP GALVANIZED STEEL SHEET AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2012/043864
Kind Code:
A1
Abstract:
A method for manufacturing a hot-dip galvanized steel sheet that has a uniform surface appearance, is highly conductive and corrosion-resistant, and has a chromate-free surface-treatment film. Said method is characterized in that a hot-dip galvanized steel sheet having an Ra of 0.5 to 2.0 µm and a PPI of at least 150 is coated by a prescribed surface-treatment agent and dried with a peak metal temperature of 50-180°C in order to form a surface-treatment film on the surface of said steel sheet, the coverage of said surface-treatment film being 0.2 to 1.0 g/m². The prescribed surface-treatment agent contains specific proportions of a specific resin compound, a specific cationic urethane resin, a silane coupling agent having a specific functional group, a specific organic titanium chelated compound, and a tetravalent vanadyl compound.
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Inventors:
KANEKO RIE (JP)
FUJIBAYASHI NOBUE (JP)
KUBOTA TAKAHIRO (JP)
FUJIBAYASHI NOBUE (JP)
KUBOTA TAKAHIRO (JP)
Application Number:
PCT/JP2011/072903
Publication Date:
April 05, 2012
Filing Date:
September 28, 2011
Export Citation:
Assignee:
JFE STEEL CORP (JP)
KANEKO RIE (JP)
FUJIBAYASHI NOBUE (JP)
KUBOTA TAKAHIRO (JP)
KANEKO RIE (JP)
FUJIBAYASHI NOBUE (JP)
KUBOTA TAKAHIRO (JP)
International Classes:
C23C22/40; B32B15/08
Foreign References:
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Other References:
See also references of EP 2623636A4
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JP)
Ken-ichiro Ochiai (JP)
Ken-ichiro Ochiai (JP)
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Claims: