STAINLESS STEEL, POLYMER ELECTROLYTE FUEL CELL SEPARATOR, AND POLYMER ELECTROLYTE FUEL CELL

Title:

STAINLESS STEEL, POLYMER ELECTROLYTE FUEL CELL SEPARATOR, AND POLYMER ELECTROLYTE FUEL CELL

Document Type and Number:

Japanese Patent JP2020061230

Kind Code:

A

Abstract:

To provide a stainless steel having good corrosion resistance even when exposed to a high potential in an environment containing fluoride ions.SOLUTION: There is provided a stainless steel satisfying the following formula (1): t×A≤1 (1). In the formula (1), t (μm) is the thickness of an oxide film after electrolysis at 0.9 V for 100 hours in a sulfuric acid solution containing fluoride ions at 80°C (where t>0), and A is an environmental index represented by the following formula (2): A=-10.2×pH+0.17×[F]+37.7 (2) (in the formula (2), [F] represents the fluoride ion concentration (ppm) of the sulfuric acid solution).SELECTED DRAWING: None

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Inventors:

SEKIMUKAI KOTARO
IMAGAWA KAZUNARI
SAIDA TOMOAKI
KONO TAKASHI

Application Number:

JP2018190447A

Publication Date:

April 16, 2020

Filing Date:

October 05, 2018

Export Citation:

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Assignee:

NIPPON STEEL NISSHIN CO LTD
TOYOTA MOTOR CORP

International Classes:

H01M8/021; C22C38/00; C22C38/58; C25D11/34; H01M8/10

Domestic Patent References:

JP2008004540A	2008-01-10
JP2005068551A	2005-03-17
JP2010140886A	2010-06-24
JP2017168401A	2017-09-21

Foreign References:

WO2014010491A1	2014-01-16
WO2018043285A1	2018-03-08

Attorney, Agent or Firm:

Axis International Patent Business Corporation

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