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Title:
SURFACE-TREATED STEEL SHEET FOR BATTERY CONTAINERS
Document Type and Number:
WIPO Patent Application WO/2017/094920
Kind Code:
A1
Abstract:
Provided is a surface-treated steel sheet (1) for battery containers, comprising: a steel sheet (11); an iron-nickel diffusion layer (12) formed upon the steel sheet (11); and a nickel layer (14) formed upon the iron-nickel diffusion layer (12) and constituting the uppermost surface layer. The surface-treated steel sheet (1) for battery containers has an iron-nickel diffusion layer (12) thickness of 0.04-0.31 µm, said thickness being the difference (D2 - D1) between the depth (D1) at which the Fe strength reaches a first prescribed value and the depth (D2) at which the Ni strength reaches a second prescribed value when the Fe strength and the Ni strength are continuously measured from the surface of the surface-treated steel sheet (1) for battery containers, in the depth direction, by using a high-frequency glow discharge emission spectrometer. The total amount of nickel included in the iron-nickel diffusion layer (12) and the nickel layer (14) is 10.8-26.7 g/m2.

Inventors:
SADAKI, Kota (LTD. Technical Research Laboratory 1296-1, Higashitoyoi, Kudamatsu-sh, Yamaguchi 11, 〒7448611, JP)
YOSHIOKA, Koh (LTD. Technical Research Laboratory 1296-1, Higashitoyoi, Kudamatsu-sh, Yamaguchi 11, 〒7448611, JP)
Application Number:
JP2016/086120
Publication Date:
June 08, 2017
Filing Date:
December 05, 2016
Export Citation:
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Assignee:
TOYO KOHAN CO., LTD. (2-12, Yonban-cho Chiyoda-k, Tokyo 47, 〒1028447, JP)
International Classes:
C25D5/50; C25D5/26; C25D7/00; H01M2/02
Domestic Patent References:
WO2003098718A12003-11-27
Foreign References:
JP2006093095A2006-04-06
JP2013170308A2013-09-02
JP2014009401A2014-01-20
Other References:
See also references of EP 3385411A4
Attorney, Agent or Firm:
TOKOSHIE PATENT FIRM (Nishishinjuku KN Bldg, 22-27 Nishishinjuku 7-chome, Shinjuku-k, Tokyo 23, 〒1600023, JP)
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