Title:
SURFACE-TREATED STEEL SHEET AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/138006
Kind Code:
A1
Abstract:
The present invention provides a surface-treated steel sheet that can be produced without using hexavalent chromium, and that exhibits excellent sulfide staining resistance and paint secondary adhesion. Provided is a surface-treated steel sheet comprising, on at least one surface of a steel sheet, a Sn plating layer, a metal Cr layer disposed upon the Sn plating layer, and an oxidized Cr layer disposed upon the metal Cr layer, wherein the water contact angle is no larger than 50°, and the total of the atomic ratios, relative to Cr, of K, Na, Mg, and Ca adsorbed on the surface of the steel sheet is no higher than 5%.
Inventors:
UENO TAKASHI (JP)
YAMANAKA YOICHIRO (JP)
SUZUKI YOSHITSUGU (JP)
TOMOZAWA MASANARI (JP)
NAKAMICHI HARUO (JP)
KAWANO TAKASHI (JP)
YAMANAKA YOICHIRO (JP)
SUZUKI YOSHITSUGU (JP)
TOMOZAWA MASANARI (JP)
NAKAMICHI HARUO (JP)
KAWANO TAKASHI (JP)
Application Number:
PCT/JP2021/043711
Publication Date:
June 30, 2022
Filing Date:
November 29, 2021
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C25D3/06; C25D5/12; C25D11/38
Domestic Patent References:
| WO2012114737A1 | 2012-08-30 |
Foreign References:
| JP2020109205A | 2020-07-16 | |||
| JP2020117748A | 2020-08-06 | |||
| JP2020200533A | 2020-12-17 | |||
| JP2002348698A | 2002-12-04 | |||
| JPS5989784A | 1984-05-24 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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