STEEL SHEET FOR CONTAINERS, AND METHOD FOR PRODUCING STEEL SHEET FOR CONTAINER

WIPO Patent Application WO/2014/189081

A1

A steel sheet for containers, which is characterized by comprising: a steel sheet; an underlying Ni layer which is formed by applying a Ni coat or a Fe-Ni alloy coat each containing Ni in an amount of 5 to 150 mg/m2 in terms of metal Ni content onto at least one surface of the steel sheet; an Sn coat layer which is formed by applying an Sn coat having a metal Sn content of 300 to 3000 mg/m2 onto the underlying Ni layer and contains island-shaped Sn regions each produced by alloying at least a part of the underlying Ni layer and at least a part of the Sn coat by a tin melting treatment; an oxide coating film layer which is formed on the Sn coat layer and contains tin oxide; and a chemical conversion treatment coating film layer which is formed on the oxide coating film layer and contains at least Zr in an amount of 1 to 500 mg/m2 in terms of metal Zr content and phosphoric acid in an amount of 0.1 to 100 mg/m2 in terms of P content. The steel sheet is also characterized in that the oxide coating film layer contains the tin oxide in such an amount that the quantity of electricity required for the reduction of the oxide coating film layer becomes 0.3 to 10 mC/cm2.

TANI YOSHIAKI (JP)
HIRANO SHIGERU (JP)
TACHIKI AKIRA (JP)
YANAGIHARA MORIO (JP)
KAWABATA MAKOTO (JP)
YOKOYA HIROKAZU (JP)

PCT/JP2014/063478

November 27, 2014

May 21, 2014

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NIPPON STEEL & SUMITOMO METAL CORP (JP)

C23C28/00; C25D5/26

WO2012002360A1	2012-01-05
WO2011118588A1	2011-09-29

JP2012062521A	2012-03-29
JP2010261068A	2010-11-18
JP2007284789A	2007-11-01

See also references of EP 3000917A4

SHIGA Masatake et al. (JP)
Masatake Shiga (JP)

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