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Title:
SURFACE-TREATED STEEL PLATE FOR CELL CONTAINER
Document Type and Number:
WIPO Patent Application WO/2017/094919
Kind Code:
A1
Abstract:
The present invention provides a surface-treated steel plate (1) for a cell container, the surface-treated steel plate being provided with a steel plate (11), an iron-nickel diffusion layer (12) formed on the steel plate (11), and a nickel layer (14) formed on the iron-nickel diffusion layer (12), the nickel layer (14) constituting a part of the outermost layer, wherein: when the Fe strength and Ni strength are measured along the direction of depth from the surface of the surface-treated steel plate (1) for a cell container using a radiofrequency glow discharge optical emission spectrometry, the thickness of the iron-nickel diffusion layer (12), which is the difference (D2−D1) between the depth (D1) at which the Fe strength indicates a first prescribed value and the depth (D2) at which the Ni strength indicates a second prescribed value, is 0.04−0.31 μm; and the total nickel content of the iron-nickel diffusion layer (12) and the nickel layer (14) is at least 4.4 g/m2 and less than 10.8 g/m2.

Inventors:
ASADA, Kengo (LTD. Technical Research Laboratory 1296-1, Higashitoyoi, Kudamatsu-sh, Yamaguchi 11, 〒7448611, JP)
SUDA, Masao (LTD. Technical Research Laboratory 1296-1, Higashitoyoi, Kudamatsu-sh, Yamaguchi 11, 〒7448611, JP)
SADAKI, Kota (LTD. Technical Research Laboratory 1296-1, Higashitoyoi, Kudamatsu-sh, Yamaguchi 11, 〒7448611, JP)
MINAGI, Hideyuki (LTD. Technical Research Laboratory 1296-1, Higashitoyoi, Kudamatsu-sh, Yamaguchi 11, 〒7448611, JP)
Application Number:
JP2016/086119
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 3385410A4
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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