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:
Jun. 21, 2005
Filed:
Jul. 09, 2003
Seiji Sugiyama, Kitakyushu, JP;
Teruaki Izaki, Kitakyushu, JP;
Masao Kurosaki, Kitakyushu, JP;
Yasuto Goto, Kitakyushu, JP;
Yusho Oyama, Kitakyushu, JP;
Tomohide Kamiyama, Kitakyushu, JP;
Seiji Sugiyama, Kitakyushu, JP;
Teruaki Izaki, Kitakyushu, JP;
Masao Kurosaki, Kitakyushu, JP;
Yasuto Goto, Kitakyushu, JP;
Yusho Oyama, Kitakyushu, JP;
Tomohide Kamiyama, Kitakyushu, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
A Sn-based metal-coated steel strip excellent in appearance comprises a Ni-based metal (such as Ni, a Ni—Sn alloy, a Ni—Zn alloy, a Ni—Fe alloy and a Ni—Co alloy) preplating layer and a Sn-based metal (such as a Sn—Zn alloy) coating formed thereon, and is characterized in that a Ni emission intensity line and an Fe emission intensity line obtained by glow discharge spectroscopy of the surface of the coated steel strip satisfy a relationship of the formula: T≧Twherein Tis a sputtering time at the peak of a Ni emission intensity line, and Tis a sputtering time at the inflection point of an Fe emission intensity line, or a relationship of the formulas: T≧T, and 1≦T/T≦1.5