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Title:
SURFACE-TREATED STEEL SHEET FOR BATTERY CONTAINERS AND METHOD FOR PRODUCING SURFACE-TREATED STEEL SHEET FOR BATTERY CONTAINERS
Document Type and Number:
WIPO Patent Application WO/2019/159794
Kind Code:
A1
Abstract:
[Problem] To provide: a surface-treated steel sheet for battery containers, which exhibits excellent processability, while maintaining the battery characteristics and liquid leakage resistance. [Solution] A surface-treated steel sheet for battery containers according to the present invention is provided with an Ni-Co-Fe system diffusion alloy plating layer on at least one surface of a base steel sheet; the diffusion alloy plating layer is composed of an Ni-Fe alloy layer and an Ni-Co-Fe alloy layer, which are arranged sequentially from the base steel sheet side; the diffusion alloy plating layer has an Ni adhesion amount within the range of from 3.0 g/m2 (inclusive) to 8.74 g/m2 (exclusive) and a Co adhesion amount within the range of from 0.26 g/m2 (inclusive) to 1.6 g/m2 (inclusive), with the total of the Ni adhesion amount and the Co adhesion amount being less than 9.0 g/m2; the surface of the diffusion alloy plating layer contains, in atom%, 19.5-60% of Co, 0.5-30% of Fe and 20-70% of (Co + Fe) as analyzed by X-ray photoelectron spectroscopy; and the thickness of the Ni-Fe alloy layer is within the range of 0.3-1.3 μm.

Inventors:
SAITO, Mamoru (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
TAKAHASHI, Takehiro (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
ISHIZUKA, Kiyokazu (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
Application Number:
JP2019/004290
Publication Date:
August 22, 2019
Filing Date:
February 06, 2019
Export Citation:
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Assignee:
NIPPON STEEL CORPORATION (6-1 Marunouchi 2-chome, Chiyoda-ku Tokyo, 71, 〒1008071, JP)
International Classes:
H01M2/02; C25D5/12; C25D5/26; C25D5/50; C25D7/00
Domestic Patent References:
WO2012147843A12012-11-01
WO2018159760A12018-09-07
Foreign References:
JP2002180296A2002-06-26
JP2003017010A2003-01-17
Attorney, Agent or Firm:
HAGIWARA, Yasushi et al. (Akebono International, Kakubari Building 1-20, Sumiyoshicho, Shinjuku-k, Tokyo 65, 〒1620065, JP)
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