Title:
SN-PLATED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2021/124510
Kind Code:
A1
Abstract:
[Problem] To provide a Sn-plated steel sheet that makes it possible to obtain excellent yellowing resistance, coating film adhesion, and sulphide blackening resistance without performing conventional chromate treatment. [Solution] This Sn-plated steel sheet includes a steel sheet, a Sn plating layer positioned on at least one surface of the steel sheet, and a coating film layer positioned on the Sn plating layer. The Sn plating layer contains 0.10-15.00 g/m2 of Sn in terms of metal Sn per side thereof, the coating film layer contains a Zr oxide and a Mn oxide, the content of the Zr oxide is 0.20-50.00 mg/m2 per side in terms of metal Zr, and the content of the Mn oxide in terms of metal Mn is 0.01-0.50 times the content of the Zr oxide in terms of metal Zr on a mass basis. In depth direction elemental analysis by XPS, the depth position A of the maximum element concentration of Mn is positioned closer to the surface side of the coating film layer than the depth position B of the maximum element concentration of Zr, and the distance between the depth position A and the depth position B in the depth direction is 2 nm or more.
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Inventors:
YAMANAKA SHINTARO (JP)
HIRANO SHIGERU (JP)
HIRANO SHIGERU (JP)
Application Number:
PCT/JP2019/049820
Publication Date:
June 24, 2021
Filing Date:
December 19, 2019
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C23C28/00; C25D5/26; C25D9/08
Domestic Patent References:
| WO2019168179A1 | 2019-09-06 | |||
| WO2015001598A1 | 2015-01-08 |
Foreign References:
| JP2018012857A | 2018-01-25 | |||
| JP2015180782A | 2015-10-15 | |||
| JP2004060052A | 2004-02-26 | |||
| JP2011174172A | 2011-09-08 | |||
| JPS63290292A | 1988-11-28 | |||
| JP2007284789A | 2007-11-01 | |||
| JP2010013728A | 2010-01-21 | |||
| JP2009249691A | 2009-10-29 |
Other References:
"Surface Analytical Chemistry Library; X-ray Photoelectron Spectroscopy", July 1998, MARUZEN PUBLISHING CO., LTD., pages: 83
See also references of EP 4023789A4
See also references of EP 4023789A4
Attorney, Agent or Firm:
HAGIWARA, Yasushi et al. (JP)
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