Title:
ZINC-PLATED STEEL SHEET HAVING COATING FILM FORMED THEREON AND HAVING EXCELLENT WHITE RUST RESISTANCE
Document Type and Number:
WIPO Patent Application WO/2011/111571
Kind Code:
A1
Abstract:
Disclosed is a zinc-plated steel sheet having a coating film formed thereon, in which a multi-layered coating film composed of a non-chromium coating composition is formed on both the front surface and the rear surface thereof, and which has excellent corrosion resistance in a flat area and excellent resistance to white rust in a processed part and an edge part (which is highly visible particularly in the initial stage in use). Specifically disclosed is a zinc-plated steel sheet having a coating film formed thereon, in which a multi-layered coating film is formed on the front surface thereof and a one-layered or multi-layered coating film is formed on the rear surface thereof. In the steel sheet, a coating film composed of a coating composition that comprises a hydroxy-group-containing coating-film-forming resin and contains a predetermined amount of an anti-corrosion pigment is formed on the lowermost layer of at least one of the front and rear surfaces thereof, and a coating film composed of a coating composition that contains a predetermined amount of a silicic acid ion of a metal silicate salt and a metal ion exchange silica, a phosphoric acid group and/or a phosphate salt group of a phosphoric-acid-group-containing coating-film-forming resin and/or a phosphate-salt-group-containing coating-film-forming resin, and/or an azole compound is formed on the uppermost layer of at least one of the front and rear surfaces.
Inventors:
MATSUDA HIDEKI (JP)
HAYASHI MASAHIRO (JP)
MIYOSHI YUYA (JP)
MURATA MICHIAKI (JP)
HAYASHI MASAHIRO (JP)
MIYOSHI YUYA (JP)
MURATA MICHIAKI (JP)
Application Number:
PCT/JP2011/054658
Publication Date:
September 15, 2011
Filing Date:
March 01, 2011
Export Citation:
Assignee:
KANSAI PAINT CO LTD (JP)
MATSUDA HIDEKI (JP)
HAYASHI MASAHIRO (JP)
MIYOSHI YUYA (JP)
MURATA MICHIAKI (JP)
MATSUDA HIDEKI (JP)
HAYASHI MASAHIRO (JP)
MIYOSHI YUYA (JP)
MURATA MICHIAKI (JP)
International Classes:
B32B27/18; B05D7/14; B32B15/08; C09D5/08; C09D163/00; C09D167/00; C23C2/06
Foreign References:
| JP2008291160A | 2008-12-04 | |||
| JP2001335955A | 2001-12-07 | |||
| JP2002097418A | 2002-04-02 |
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (JP)
Patent business corporation 3 Edakuni [Hajime] patent firm (JP)
Patent business corporation 3 Edakuni [Hajime] patent firm (JP)
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Claims: