Title:
SURFACE-TREATED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2020/129473
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a surface-treated steel sheet having excellent corrosion resistance in a worked part, and excellent corrosion resistance particularly in an end part. The present invention provides a surface-treated steel sheet having a chemical conversion film having a thickness of 3.0 µm or less on the surface of a hot-dip Zn-Al plated steel sheet having a hot-dip Zn-Al plating film containing more than 1.0 mass% and no more than 15 mass% of Al, the remainder comprising Zn and unavoidable impurities, the chemical conversion film containing a total of 3.0-50 mass% of AlH2P3O10∙2H2O and a compound containing one or more elements selected from Mg, Ca, and Sr.
Inventors:
YOSHIDA MASAHIRO (JP)
MATSUDA TAKESHI (JP)
OKAI KAZUHISA (JP)
FUSHIWAKI YUSUKE (JP)
MATSUZAKI AKIRA (JP)
MIZUNO DAISUKE (JP)
MATSUDA TAKESHI (JP)
OKAI KAZUHISA (JP)
FUSHIWAKI YUSUKE (JP)
MATSUZAKI AKIRA (JP)
MIZUNO DAISUKE (JP)
Application Number:
PCT/JP2019/044450
Publication Date:
June 25, 2020
Filing Date:
November 13, 2019
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C22C18/04; C23C2/06; C23C2/26; C23C2/40; C23C22/23; C23C28/00
Domestic Patent References:
| WO2018092244A1 | 2018-05-24 | |||
| WO2016159138A1 | 2016-10-06 |
Foreign References:
| JP2006290157A | 2006-10-26 | |||
| JP2002053980A | 2002-02-19 | |||
| JP2005246815A | 2005-09-15 | |||
| JP2017121778A | 2017-07-13 | |||
| JP2006077077A | 2006-03-23 | |||
| JP2008138285A | 2008-06-19 | |||
| JP2000104154A | 2000-04-11 | |||
| JP2003306777A | 2003-10-31 | |||
| JP2004002950A | 2004-01-08 | |||
| JP2002302776A | 2002-10-18 |
Other References:
MORIMOTO, YASUHIDE ET AL.: "Excellent Corrosion-resistant Zn-Al-Mg-Si Alloy Hot-dip Galvanized Steel Sheet ''SUPER DYMA", NIPPON STEEL TECHNICAL REPORT, vol. 377, November 2002 (2002-11-01), pages 22 - 24, XP009517586
See also references of EP 3901296A4
See also references of EP 3901296A4
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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