Title:
SURFACE-TREATED STEEL SHEET AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2023/195251
Kind Code:
A1
Abstract:
The present invention provides a surface-treated steel sheet which can be produced without using hexavalent chromium, and which exhibits excellent film corrosion resistance, coating corrosion resistance, film wet adhesion, coating material secondary adhesion and weldability. The present invention provides a surface-treated steel sheet which comprises, on at least one surface of a steel sheet, an Ni-containing layer, a Cr metal layer that is arranged on the Ni-containing layer, and a Cr oxide layer that is arranged on the Cr metal layer, wherein: the water contact angle is 50° or less; and the sum of the atomic ratios, relative to Cr, of K, Na, Mg and Ca adsorbed on the surface of the steel sheet is 5.0% or less.
Inventors:
UENO TAKASHI (JP)
NAKAGAWA YUSUKE (JP)
NAKAGAWA YUSUKE (JP)
Application Number:
PCT/JP2023/006069
Publication Date:
October 12, 2023
Filing Date:
February 20, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C25D5/14; C25D3/06; C25D5/26; C25D5/48
Domestic Patent References:
| WO2007129979A1 | 2007-11-15 |
Foreign References:
| JP2020200533A | 2020-12-17 | |||
| JP2009035806A | 2009-02-19 | |||
| JP2020109205A | 2020-07-16 | |||
| JP2014513214A | 2014-05-29 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
Download PDF:
Previous Patent: POWER CONTROL DEVICE
Next Patent: SURFACE-TREATED STEEL SHEET AND PRODUCTION METHOD THEREFOR
Next Patent: SURFACE-TREATED STEEL SHEET AND PRODUCTION METHOD THEREFOR