Title:
INORGANIC-ORGANIC COMPOSITE-TREATED ZINC-PLATED STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2005/045097
Kind Code:
A1
Abstract:
Disclosed is an inorganic-organic composite-treated zinc-plated steel sheet with excellent corrosion resistance which does not contain a noxious chromate in a treated coating film. The inorganic-organic composite-treated zinc-plated steel sheet is characterized by comprising a Zn plating layer which is formed on a steel sheet and has a crystal orientation in the (002) plane of not less than 50%, an Mg-containing zinc phosphate coating film formed on the Zn plating layer, and an organic coating layer formed on the zinc phosphate coating film. It is preferable that the ratio of Mg/P (mass ratio) in the zinc phosphate coating film is not less than 0.1 and the amount of Mg is not less than 20 mg/m2. It is also preferable that the organic coating layer contains an epoxy resin and/or a modified epoxy resin and the coating amount of the organic coating layer is 0.3-5 g/m2.
Inventors:
ISHIZUKA KIYOKAZU (JP)
NAKAMURA HIROSHI (JP)
ITO DAISUKE (JP)
KIKUCHI IKUO (JP)
NAKAMURA HIROSHI (JP)
ITO DAISUKE (JP)
KIKUCHI IKUO (JP)
Application Number:
PCT/JP2004/016916
Publication Date:
May 19, 2005
Filing Date:
November 09, 2004
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
ISHIZUKA KIYOKAZU (JP)
NAKAMURA HIROSHI (JP)
ITO DAISUKE (JP)
KIKUCHI IKUO (JP)
ISHIZUKA KIYOKAZU (JP)
NAKAMURA HIROSHI (JP)
ITO DAISUKE (JP)
KIKUCHI IKUO (JP)
International Classes:
C23C22/12; C23C22/82; C23C28/00; (IPC1-7): C23C28/00; C25D5/26
Foreign References:
| JP2002256480A | 2002-09-11 | |||
| JP2001131763A | 2001-05-15 |
Attorney, Agent or Firm:
Aoki, Atsushi (ISHIDA & ASSOCIATES Toranomon 37 Mori
Bldg., 5-1, Toranomon 3-chom, Minato-ku Tokyo 23, JP)
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