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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12454749 B1

PDFFull Text
Date of Patent:
Oct. 28, 2025

Filed:

Jan. 26, 2023

Plated steel sheet

Applicant:

Nippon Steel Corporation, Tokyo, JP;

Inventors:

Takuya Mitsunobu, Tokyo, JP;

Masaaki Uranaka, Tokyo, JP;

Masahiro Matsuba, Tokyo, JP;

Toyomitsu Nakamura, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Daniel J Schleis

Int. Cl.
CPC ...
B32B 15/01 (2006.01); C22C 18/00 (2006.01); C22C 18/04 (2006.01); C22C 21/02 (2006.01); C22C 21/08 (2006.01); C22C 21/10 (2006.01); C22C 30/06 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C23C 2/02 (2006.01); C23C 2/04 (2006.01); C23C 2/06 (2006.01); C23C 2/12 (2006.01); C23C 2/20 (2006.01); C23C 2/40 (2006.01); C23C 30/00 (2006.01);
U.S. Cl.
CPC ...
C23C 2/405 (2013.01); B32B 15/012 (2013.01); B32B 15/013 (2013.01); C22C 18/00 (2013.01); C22C 18/04 (2013.01); C22C 21/02 (2013.01); C22C 21/08 (2013.01); C22C 21/10 (2013.01); C22C 30/06 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C23C 2/0222 (2022.08); C23C 2/0224 (2022.08); C23C 2/04 (2013.01); C23C 2/06 (2013.01); C23C 2/12 (2013.01); C23C 2/20 (2013.01); C23C 2/40 (2013.01); C23C 30/00 (2013.01);
Abstract

To more reliably suppress LME and blowhole formation while maintaining excellent corrosion resistance. A plated steel sheet according to the present invention, includes: a steel sheet as a base material; a plating layer located on at least part of a surface of the steel sheet; and an oxide layer located on a surface of the plating layer, where a chemical composition of the plating layer is made up of prescribed components, and Zn and impurities as the balance, and when a position at a depth of 5 nm from an uppermost surface of the oxide layer is observed by X-ray photoelectron spectroscopy (XPS), a value of an intensity ratio ([Al—O]+[Mg—O])/[Zn—O]) calculated from intensity of peaks respectively attributed to an Al—O bond, an Mg—O bond, and a Zn—O bond is 5.0 or more.

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