Sn-based metal-coated steel strip excellent in appearance...

Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...

Reexamination Certificate

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C428S679000, C428S939000, C427S433000

Reexamination Certificate

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06908693

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: T1≧T2wherein T1is a sputtering time at the peak of a Ni emission intensity line, and T2is a sputtering time at the inflection point of an Fe emission intensity line, or a relationship of the formulas: T1≧T2, and 1≦T1/T2≦1.5

REFERENCES:
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patent: 9-3658 (1997-01-01), None
patent: 2000-119833 (2000-04-01), None
patent: 2001-355051 (2001-12-01), None
patent: 2002-105615 (2002-04-01), None
Translation of Japanese publication 07-207841, published Aug. 1995.
Translation of Japanese publication 08-269733, published Oct. 1996.
Translation of Japanese publication 08-325692, published Dec. 1996.
Translation of Japanese publication 09-003658, published Jan. 1997.
Patent Abstracts of Japan, Japanese Unexamined Patent Publication No. 2000-119833, Apr. 25, 2000.
Patent Abstracts of Japan, Japanese Unexamined Patent Publication No. 08-060326, Mar. 5, 1996.

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