Title:
STAINLESS STEEL FOR FUEL CELL SEPARATOR HAVING EXCELLENT SURFACE ELECTRICAL CONDUCTIVITY AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/125532
Kind Code:
A1
Abstract:
The present specification discloses stainless steel for a fuel cell separator, the stainless steel having excellent surface electrical conductivity. According to an embodiment of the disclosed stainless steel for a fuel cell separator, the stainless steel having excellent surface electrical conductivity, when the surface of the stainless steel containing 15 wt% or greater of Cr is measured by X-ray angle-resolved photoelectron spectroscopy using an Al-Kα X-ray source under a condition of a photoelectron take-off angle of 12-85°, the measured value of surface oxide element ratio (1) below may be 0.2 or greater. The Cr oxide means Cr3O4, Cr2O3, CrO2, or CrO3, and the Cr hydroxide means CrOOH, Cr(OH)2, or Cr(OH)3. The total oxide and hydroxide comprise the Cr oxide, the Cr hydroxide, an Fe oxide, an Fe hydroxide, and a metal oxide (MO), wherein the metal oxide (MO) comprises a mixed oxide, M is an alloy element in a mother material, other than Cr and Fe, or a combination thereof, and O means oxygen.
Inventors:
KIM JONG-HEE (KR)
KIM JIN-SUK (KR)
SEO BO-SUNG (KR)
KIM JIN-SUK (KR)
SEO BO-SUNG (KR)
Application Number:
PCT/KR2020/014220
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 | |||
| KR101558276B1 | 2015-10-07 |
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
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