Title:
STAINLESS STEEL HAVING EXCELLENT SURFACE ELECTRICAL CONDUCTIVITY FOR FUEL CELL SEPARATOR AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2021/125533
Kind Code:
A1
Abstract:
Disclosed in the specification is a stainless steel having excellent surface electrical conductivity for a fuel cell separator. A stainless steel having excellent surface electrical conductivity for a fuel cell separator disclosed according to an embodiment may have the following surface oxide element ratio (1) value of 0.08 or more as measured for the surface of the stainless steel containing 15 weight% of Cr or more by X-ray angular-resolved photoelectron spectroscopy using an Al-Kα X-ray source under the condition of photoelectron take-off angle of 12°C-85°C. (I) The Cr hydroxide refers to CrOOH, Cr(OH)2, or Cr(OH)3. The total oxides and hydroxides include a Cr oxide, the Cr hydroxide, a Fe oxide, a Fe hydroxide, and a metal oxide (MO); the metal oxide (MO) includes a mixed oxide; M refers to an alloying element in a base material excluding Cr and Fe, or a combination thereof; and O refers to oxygen.
Inventors:
KIM JONG-HEE (KR)
SEO BO-SUNG (KR)
KIM JIN-SUK (KR)
SEO BO-SUNG (KR)
KIM JIN-SUK (KR)
Application Number:
PCT/KR2020/014221
Publication Date:
June 24, 2021
Filing Date:
October 19, 2020
Export Citation:
Assignee:
POSCO (KR)
International Classes:
H01M8/021; C22C32/00; C22C38/18; C23C22/50; C25F1/00; H01M8/0228
Foreign References:
| KR20170035374A | 2017-03-31 | |||
| KR101588093B1 | 2016-01-22 | |||
| KR100777123B1 | 2007-11-19 | |||
| JP2004149920A | 2004-05-27 | |||
| KR100844023B1 | 2008-07-04 | |||
| KR20140081161A | 2014-07-01 | |||
| KR20130099148A | 2013-09-05 | |||
| JP2004149920A | 2004-05-27 |
Other References:
See also references of EP 4080624A4
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
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