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Title:
ZINC−PLATED STEEL SHEET EXCELLENT IN CORROSION RESISTANCE AFTER COATING AND CLARITY OF COATING THEREON
Document Type and Number:
WIPO Patent Application WO/2003/060179
Kind Code:
A1
Abstract:
A zinc alloy plated steel sheet, characterized in that it comprises a steel sheet and, applied thereon, a metal plating having a composition in mass %: Mg: 1 to 10 %, Al: 2 to 19 %, Si: 0.001 to 2 %, the other elements except zinc: 0.5 % in total, and balance: Zn, and satisfies a Ra ≤ 1.0 μm, wherein Ra represents an average roughness on a center line, and a WCA ≤ 0.8 μm wherein WCA represents a filtered center line waveness&semi and the zinc alloy plated steel sheet which has a metal plating further comprising one or more of the following elements: Ca: 0.01 to 0.5 %, Be: 0.01 to 0.2 %, Ti: 0.0001 to 0.2 %, Cu: 0.1 to 10 %, Ni: 0.001 to 0.2 %, Co: 0.01 to 0.3 %, Cr: 0.0001 to 0.2 %, and Mn: 0.01 to 0.5 %. The zinc alloy plated steel sheet is excellent in the corrosion resistance after coating and the clarity of a coating applied thereon.

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Inventors:
HONDA KAZUHIKO (JP)
TAKAHASHI AKIRA (JP)
SUEMUNE YOSHIHIRO (JP)
HATANAKA HIDETOSHI (JP)
MIYAKE TSUYOSHI (JP)
Application Number:
PCT/JP2003/000071
Publication Date:
July 24, 2003
Filing Date:
January 08, 2003
Export Citation:
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Assignee:
NIPPON STEEL CORP (JP)
HONDA KAZUHIKO (JP)
TAKAHASHI AKIRA (JP)
SUEMUNE YOSHIHIRO (JP)
HATANAKA HIDETOSHI (JP)
MIYAKE TSUYOSHI (JP)
International Classes:
B32B15/01; C22C18/00; C22C18/04; C22C38/00; C23C2/06; C23C2/26; (IPC1-7): C23C2/06; C23C2/26; C22C18/04
Foreign References:
JP3179446B22001-06-25
JP2000064061A2000-02-29
JPH07316763A1995-12-05
Other References:
See also references of EP 1466994A4
Attorney, Agent or Firm:
Ishida, Takashi (ISHIDA & ASSOCIATES Toranomon 37 Mori Bldg., 5-1, Toranomon 3-chom, Minato-ku Tokyo, JP)
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