GALVANIZED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME

Title:

GALVANIZED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME

Document Type and Number:

WIPO Patent Application WO/2010/070943

Kind Code:

A1

Abstract:

Provided is a method for manufacturing a galvanized steel sheet, wherein the surface of the steel sheet is exposed to an aqueous solution that contains zinc with a zinc ion concentration in the range of 1-100g/l, exposed to an aqueous solution with a pH of 6-14, and then washed and dried. An example of a zinc-containing solution would be a solution that contains zinc sulfate. The aforementioned method enables an oxide layer, mainly composed of zinc with an average thickness of no less than 10nm, to be formed on the surface of the steel sheet, thereby enabling a galvanized steel sheet with excellent press formability to be manufactured quickly, in a stable manner, and in minimal space.

Inventors:

MAKIMIZU YOICHI (JP)
KAJIYAMA HIROSHI (JP)
FUJITA SAKAE (JP)
YOSHIMI NAOTO (JP)
TADA MASAHIKO (JP)
OOTSUKA SHINJI (JP)
MASUOKA HIROYUKI (JP)
HOSHINO KATSUYA (JP)

Application Number:

PCT/JP2009/058427

Publication Date:

June 24, 2010

Filing Date:

April 22, 2009

Export Citation:

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Assignee:

JFE STEEL CORP (JP)
MAKIMIZU YOICHI (JP)
KAJIYAMA HIROSHI (JP)
FUJITA SAKAE (JP)
YOSHIMI NAOTO (JP)
TADA MASAHIKO (JP)
OOTSUKA SHINJI (JP)
MASUOKA HIROYUKI (JP)
HOSHINO KATSUYA (JP)

International Classes:

C23C28/00; C23C22/53

Foreign References:

JP2003306781A	2003-10-31
JP2000328220A	2000-11-28
JPS5360332A	1978-05-30
JPH02190483A	1990-07-26
JP2003306781A	2003-10-31
JP2004003004A	2004-01-08
JP2005248262A	2005-09-15

Other References: