STEEL SHEET FOR FUEL TANK HAVING HIGH CORROSION RESISTANCE

Title:

STEEL SHEET FOR FUEL TANK HAVING HIGH CORROSION RESISTANCE

Document Type and Number:

WIPO Patent Application WO/2001/075191

Kind Code:

A1

Abstract:

A steel sheet for a fuel tank having high corrosion resistance which comprises a steel sheet (1) containing 0.0007 to 0.0050 mass % of C, 0.5 mass % or less of Si, 2.0 mass % or less of Mn, 0.10 mass % or less of P, 0.015 mass % or less of S, 0.01 to 0.20 mass % of Al, 0.01 mass % or less of N, 0.005 to 0.08 mass % of Ti, and 0.001 to 0.01 mass % of B, zinc based plating layers (2a, 2b) and chromate layers (3a, 3b) laminated in this order on both surfaces of the steel sheet respectively, a first composite film (4) comprising powders of Al and Ni and an amine-modified epoxy resin formed on a chromate layer (3a), and a second composite film (5) comprising at least one organic resin having at least one functional group selected from the group consisting of a hydroxyl group, an isocyanate group, a carboxyl group, a glycidyl group and an amino group, silica, a lubricant and electrically conductive particles formed on another chromate layer (3b). The steel sheet has much improved weldability in resistance welding in particular.

Inventors:

SUZUKI SACHIKO (JP)
OGATA HIROYUKI (JP)
KAMAKURA KAZUHIKO (JP)
MATSUOKA SAIJI (JP)
UMINO SHIGERU (JP)

Application Number:

PCT/JP2001/002742

Publication Date:

October 11, 2001

Filing Date:

March 30, 2001

Export Citation:

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Assignee:

KAWASAKI STEEL CO (JP)
SUZUKI SACHIKO (JP)
OGATA HIROYUKI (JP)
KAMAKURA KAZUHIKO (JP)
MATSUOKA SAIJI (JP)
UMINO SHIGERU (JP)

International Classes:

B05D7/14; B05D7/24; B60K15/03; B32B15/08; C23C22/24; C23C22/83; C23C28/00; F02M37/00; (IPC1-7): C23C28/00

Foreign References:

JPH10278173A

1998-10-20

Other References: