SURFACE-TREATED STEEL SHEET

WIPO Patent Application WO/2024/071189

A1

The present invention addresses the problem of providing a surface-treated steel sheet that particularly improves resistance to surface contact scratch caused by contact between one surface and the other surface as a further improvement in scratch resistance, and that has excellent corrosion resistance. The surface-treated steel sheet has, on either surface thereof, a plating layer, a first coloring membrane layer, and a second coloring membrane layer. The ratio of the film thickness of the second coloring membrane layer to the film thickness of the first coloring membrane layer is between 0.1 and 0.5 inclusive. The first coloring membrane layer and the second coloring membrane layer contain resin particles. The proportion of the number of the resin particles having a thickness greater than or equal to the film thickness of the first coloring membrane layer is between 1% and 30% inclusive. The proportion of the number of the resin particles having a thickness greater than or equal to the film thickness of the second coloring membrane layer is between 50% and 100% inclusive.

JP7211710	Method and Apparatus for Bonding Titanium and Titanium Alloy Structures to Epoxy-Containing Compounds
JPS5741952	RESIN-METAL LAMINATE
JP3840409	CORROSION RESISTANT STEEL SHEET HAVING EXCELLENT COATING CORROSION RESISTANCE AND PITTING CORROSION RESISTANCE

HIRAI AKIKO (JP)
KAWAMURA YASUAKI (JP)
FUJII TAKASHI (JP)
TOSHIN KUNIHIKO (JP)

PCT/JP2023/035131

April 04, 2024

September 27, 2023

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NIPPON STEEL CORP (JP)

B32B15/08; C23C28/00

WO2014112544A1

2014-07-24

JPH09187881A	1997-07-22
JP2017061750A	2017-03-30

HAGIWARA, Yasushi et al. (JP)

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