MOLTEN Zn-BASED PLATED STEEL SHEET HAVING SUPERIOR CORROSION RESISTANCE AFTER BEING COATED

Title:

MOLTEN Zn-BASED PLATED STEEL SHEET HAVING SUPERIOR CORROSION RESISTANCE AFTER BEING COATED

Document Type and Number:

WIPO Patent Application WO/2019/130534

Kind Code:

A1

Abstract:

This molten Zn-based plated steel sheet includes, on at least a portion of a surface of the steel sheet, a plating layer containing 10-40 mass% of Al, 0.05-4 mass% of Si, and 0.5-4 mass% of Mg, the remaining portion being Zn and incidental impurities. The plating layer includes a lamellar structure in which layer-shaped Zn phases and layer-shaped Al phases are provided so as to be alternatively arranged in the cross section of the plating layer. In the cross-section of the plating layer, the area fraction of the lamellar structure is 5% or more, and, in terms of area fraction, the total proportion of an intermetallic compound containing at least one of Fe, Mn, Ti, Sn, In, Bi, Pb, and B in the plating layer is limited to 3% or less.

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Inventors:

MITSUNOBU TAKUYA (JP)

Application Number:

PCT/JP2017/047173

Publication Date:

July 04, 2019

Filing Date:

December 28, 2017

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)

International Classes:

C23C2/06; C23C2/40

Domestic Patent References:

WO2000071773A1

2000-11-30

Foreign References:

JP2016514202A	2016-05-19
US20090004400A1	2009-01-01
JP2004323974A	2004-11-18
JP2003253416A	2003-09-10
JP2001329383A	2001-11-27
JP2015214749A	2015-12-03

Other References: