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.:
Date of Patent:
Oct. 15, 2002
Filed:
Dec. 22, 1999
Kazuhiko Honda, Kimitsu, JP;
Kazumi Nishimura, Futtsu, JP;
Yasuhide Morimoto, Futtsu, JP;
Satoru Tanaka, Kimitsu, JP;
Yoshihiro Suemune, Kimitsu, JP;
Jun Maki, Kitakyushu, JP;
Hidetoshi Shindo, Himeji, JP;
Masaaki Sugiyama, Futtsu, JP;
Hiroyasu Furukawa, Kimitsu, JP;
Masao Kurosaki, Futtsu, JP;
Hiromasa Nomura, Futtsu, JP;
Hiroshi Kanai, Futtsu, JP;
Kohei Ueda, Futtsu, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
A coated steel material excellent in corrosion resistance and a method of producing the same, wherein a coated steel material has on the surface of the steel sheet a Zn-alloy coating layer containing 1-10 wt % of Mg, 2-19 wt % of Al and 0.01-2 wt % of Si, where Mg and Al satisfy Mg (%)+Al (%)≦20%, the balance being Zn and unavoidable impurities, and has a coating layer structure of a Mg intermetallic compound or the like. As a base metal treatment, it is preferably provided with a Ni coating layer. The coated Zn-alloy coated steel sheet may have provided on the coating layer, as an intermediate layer, a chromate film layer, and, as an upper layer, an organic coating layer. The Zn-alloy coating layer may further contain one or more of 0.01-1 wt % of In, 0.01-1 wt % of Bi and 1-10 wt % of Sn. The coated steel material may be painted.