Surface-treated steel sheet for battery containers, battery container, and battery
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United States of America Patent
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Mar 6, 2018
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N/A
app pub date -
Feb 20, 2015
filing date -
Aug 29, 2012
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Abstract
There is provided a surface-treated steel sheet for battery containers. The surface-treated sheet is used to form a battery container for a battery. The battery uses a nonaqueous electrolytic solution as an electrolytic solution. The surface-treated steel sheet is characterized by the features as below. The surface-treated steel sheet includes a base material made of steel and an iron-nickel diffusion layer formed by performing thermal diffusion treatment after forming a nickel plating layer at least on a surface of the base material to be located at the inner surface side of the battery container. The iron-nickel diffusion layer has an outermost layer of which a ratio of Ni and Fe is 7.5 or less as a molar ratio of Ni/Fe. The iron-nickel diffusion layer has a thickness of 0.6 μm or more.
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