Title:
STAINLESS STEEL FOR FUEL CELL SEPARATOR WITH EXCELLENT SURFACE HYDROPHILICITY AND ELECTRICAL CONDUCTIVITY, AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2022/114671
Kind Code:
A1
Abstract:
Disclosed in the specification is a stainless steel for a fuel cell separator, the stainless steel having excellent surface hydrophilicity and electrical conductivity. According to an embodiment of a stainless steel having excellent surface hydrophilicity and electrical conductivity for a fuel cell separator, the value of the surface oxide element ratio (1) below may be 0.2 or greater and the contact angle may be 80° or lower as measured for the surface of a stainless steel containing 15 wt% or more of Cr by X-ray angular-resolved photoelectron spectroscopy using an Al-Kα X-ray source under the condition of photoelectron take-off angle of 12° to 85°. (1) The Cr oxide represents Cr3O4, Cr2O3, CrO2, or CrO3; and the Cr hydroxide represents CrOOH, Cr(OH)2, or Cr(OH)3. The total oxides and hydroxides include the Cr oxide, the Cr hydroxide, an Fe oxide, an Fe hydroxide, and a metal oxide (MO), wherein the metal oxide (MO) includes a mixed oxide; M is an alloy element in a base material, other than Cr and Fe, or a combination thereof; and O represents oxygen.
Inventors:
KIM JONG-HEE (KR)
LIM KYUWAN (KR)
SEO BO-SUNG (KR)
KIM KWANGMIN (KR)
KIM YOUNG-HWAN (KR)
LIM KYUWAN (KR)
SEO BO-SUNG (KR)
KIM KWANGMIN (KR)
KIM YOUNG-HWAN (KR)
Application Number:
PCT/KR2021/016994
Publication Date:
June 02, 2022
Filing Date:
November 18, 2021
Export Citation:
Assignee:
POSCO (KR)
International Classes:
H01M8/0228; C23G1/08; C25D9/10; C25D11/34; C25F1/06; H01M8/021; H01M8/0215; H01M8/0258
Foreign References:
| KR20180107050A | 2018-10-01 | |||
| KR20170095880A | 2017-08-23 | |||
| KR101729037B1 | 2017-04-24 | |||
| KR20130121930A | 2013-11-06 | |||
| KR20100095708A | 2010-09-01 | |||
| KR20140081161A | 2014-07-01 | |||
| KR20130099148A | 2013-09-05 | |||
| JP2004149920A | 2004-05-20 | |||
| KR101410479B1 | 2014-06-27 | |||
| KR20130136713A | 2013-12-13 | |||
| JP2009117114A | 2009-05-14 | |||
| JP2007119856A | 2007-04-27 | |||
| KR101729037B1 | 2017-04-24 |
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
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