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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 10688755 B1

PDFFull Text
Date of Patent:
Jun. 23, 2020

Filed:

Dec. 01, 2016

Steel sheet for a fuel tank

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Kiyokazu Ishizuka, Tokyo, JP;

Noriyuki Maekawa, Tokyo, JP;

Hiroaki Uramoto, Tokyo, JP;

Masahiro Fuda, Tokyo, JP;

Ikuro Yamaoka, Tokyo, JP;

Kenichiro Matsumura, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Xiaobei Wang

Int. Cl.
CPC ...
B32B 15/18 (2006.01); B32B 15/04 (2006.01); B32B 15/08 (2006.01); C25D 7/00 (2006.01); C23C 28/00 (2006.01); B60K 15/03 (2006.01); B32B 15/01 (2006.01); B32B 1/02 (2006.01); C25D 5/48 (2006.01); B65D 85/84 (2006.01); C23C 28/02 (2006.01); C23C 22/78 (2006.01); C23C 22/42 (2006.01); C23C 22/60 (2006.01); C23C 22/44 (2006.01); C23C 22/36 (2006.01); C23C 22/07 (2006.01); C23F 17/00 (2006.01); C25D 3/56 (2006.01);
U.S. Cl.
CPC ...
B32B 15/015 (2013.01); B32B 1/02 (2013.01); B32B 15/04 (2013.01); B32B 15/18 (2013.01); B60K 15/03 (2013.01); B65D 85/84 (2013.01); C23C 22/07 (2013.01); C23C 22/361 (2013.01); C23C 22/42 (2013.01); C23C 22/44 (2013.01); C23C 22/60 (2013.01); C23C 22/78 (2013.01); C23C 28/00 (2013.01); C23C 28/021 (2013.01); C23C 28/023 (2013.01); C23C 28/025 (2013.01); C23C 28/321 (2013.01); C23C 28/322 (2013.01); C23C 28/3225 (2013.01); C23F 17/00 (2013.01); C25D 3/565 (2013.01); C25D 5/48 (2013.01); C25D 7/00 (2013.01); B60K 2015/03486 (2013.01); C23C 2222/20 (2013.01);
Abstract

A steel sheet for a fuel tank includes: a Zn—Ni alloy plated layer which is placed on one surface or each of both surfaces of a base metal and formed on at least one surface; and an inorganic chromate-free chemical conversion coating film which is placed over the Zn—Ni alloy plated layer. The Zn—Ni alloy plated layer has a crack starting from an interface between the Zn—Ni alloy plated layer and the inorganic chromate-free chemical conversion coating film and reaching an interface between the Zn—Ni alloy plated layer and the steel sheet, and a water contact angle on a surface of the inorganic chromate-free chemical conversion coating film is more than or equal to 50 degrees.

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