Title:
ZN-BASED PLATED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2022/085721
Kind Code:
A1
Abstract:
This Zn-based plated steel sheet is provided with: a steel sheet; a Zn-based plating layer that is provided to at least one surface of the steel sheet and that contains 0.05-60 mass% of Al and Zn; and a chromate-free chemical conversion treatment layer that is provided to the Zn-based plating layer and that has a deposition amount of 0.1-15 g/m2 per one surface. The chemical conversion treatment layer contains not less than 20 mass% of a resin, 1-20 mass% of silica particles having an average particle size of 5-200 nm, and a pigment that contains one or more of Cu, Co, or Fe. When the appearance of the Zn-based plated steel sheet is evaluated by CIE1976(L*,a*,b*) color space, b* is -30 to -2 and the 60° mirror surface glossiness Gs(60°) defined in JIS Z 8741:1997 is 50-200. The Zn-based plated steel sheet has metallic appearance.
Inventors:
TOBA TETSUYA (JP)
TOSHIN KUNIHIKO (JP)
MORISHITA ATSUSHI (JP)
TOSHIN KUNIHIKO (JP)
MORISHITA ATSUSHI (JP)
Application Number:
PCT/JP2021/038767
Publication Date:
April 28, 2022
Filing Date:
October 20, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C18/00; C22C18/04; C22C21/18; C23C2/06; C23C2/12; C23C28/00
Domestic Patent References:
| WO2019225764A1 | 2019-11-28 | |||
| WO2016208621A1 | 2016-12-29 | |||
| WO2013065354A1 | 2013-05-10 |
Foreign References:
| JPH0994916A | 1997-04-08 |
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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