Title:
SURFACE-TREATED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2024/048655
Kind Code:
A1
Abstract:
Provided is a surface-treated steel sheet with which it is possible to obtain exceptional corrosion resistance, adhesion with respect to an adhesive, and blackening resistance, and furthermore to obtain exceptional condensation discoloration resistance. In a surface-treated steel sheet according to the present embodiment, a plating layer contains, in terms of mass%, more than 5.0% and less than 25.0% of Al, and more than 3.0% and less than 12.5% of Mg, the balance being 65.0% or more of Zn and impurities. A chemical conversion coating formed on the plating layer contains Zr, V, P, and Co, and an acrylic resin. The mass [V]mg/m2 of V and the mass [P]mg/m2 of P in the chemical conversion coating satisfy relationship (1), and the mass [V]mg/m2 of V and the Mg content [Mg]b mass% of the plating layer satisfy relationship (2). [Relationship (1)] 0.60≤[V]/[P]≤2.80; [Relationship (2)] 0<[V]/[Mg]b≤20.00
Inventors:
KAWAMOTO KOSUKE (JP)
SAITO MAMORU (JP)
GOTO YASUTO (JP)
SHOJI HIROMASA (JP)
SAITO MAMORU (JP)
GOTO YASUTO (JP)
SHOJI HIROMASA (JP)
Application Number:
PCT/JP2023/031546
Publication Date:
March 07, 2024
Filing Date:
August 30, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C23C28/00; C22C18/04; C23C2/06; C23C22/60
Domestic Patent References:
| WO2017155028A1 | 2017-09-14 | |||
| WO2009004684A1 | 2009-01-08 | |||
| WO2018083784A1 | 2018-05-11 |
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
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