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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 11084252 B1

PDFFull Text
Date of Patent:
Aug. 10, 2021

Filed:

Mar. 01, 2018

Surface-treated steel sheet

Applicant:

Nippon Steel Corporation, Tokyo, JP;

Inventors:

Mamoru Saito, Tokyo, JP;

Takehiro Takahashi, Tokyo, JP;

Kiyokazu Ishizuka, 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 19/03 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C25D 3/12 (2006.01); C25D 5/12 (2006.01); C25D 5/50 (2006.01); C25D 7/00 (2006.01); H01M 50/124 (2021.01);
U.S. Cl.
CPC ...
B32B 15/015 (2013.01); C22C 19/03 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C25D 3/12 (2013.01); C25D 5/12 (2013.01); C25D 5/50 (2013.01); C25D 7/00 (2013.01); H01M 50/124 (2021.01); H01M 50/1245 (2021.01); B32B 2457/10 (2013.01); Y10T 428/12937 (2015.01);
Abstract

A surface-treated steel sheet according to an aspect of the present invention includes: a steel sheet as a base metal and a coating layer, in which the coating layer includes a Ni—Co alloy coating layer, a Ni—Fe alloy layer, and a Ni layer, in the coating layer, a total adhesion amount of Co is 0.2 g/mto 2.3 g/m, and a total adhesion amount of Ni is 8.9 g/mor more, the Ni layer has a thickness of 0.3 μm to 3.0 μm, an atomic concentration of Co on a surface of the Ni—Co alloy coating layer is 20 at % to 70 at %, and a Co concentration gradient y in the coating layer in a depth direction is 50 mass %/μm to 400 mass %/μm.

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