SOLID POLYMER ELECTROLYTE TYPE FUEL CELL−USE SEPARATOR AND PRODUCTION METHOD THEREFOR

WIPO Patent Application WO/2003/034525

A1

A stainless steel−made separator, especially, a solid polymer electrolyte type fuel cell−use separator having both high corrosion resistance and high conductivity, and a production method therefor. The solid polymer electrolyte type fuel cell−use separator is formed by coating the surface of stainless steel having a general corrosion index, GI=[Cr%]&plus 3.6[Ni%]&plus 4.7[Mo%]&plus 11.5[Cu%], of at least 90 with a conductive compound such as metal nitride and metal−dispersed diamond−like carbon. When forming a coating, ion bombarding is conducted on the surface of the above high−corrosion−resistance stainless steel as a pre−treatment, and then a conductive compound is applied by ion plating. High corrosion resistance and high conductivity are ensured by this surface coating at coated portions, and high corrosion resistance is supported by the passive coating of stainless steel itself at non−coated portions (defective portions such as pin holes).

SASAKI MASAHIRO (JP)
SHIRAE KATUNORI (JP)

PCT/JP2002/007480

April 24, 2003

July 24, 2002

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NIPPON METAL IND (JP)
SASAKI MASAHIRO (JP)
SHIRAE KATUNORI (JP)

C22C38/00; C22C38/48; H01M8/02; H01M8/10; (IPC1-7): H01M8/02

JPH11126622A	1999-05-11
JP2001093538A	2001-04-06
JPH11144744A	1999-05-28
JP2000353531A	2000-12-19
JP2001236967A	2001-08-31
JP2001243962A	2001-09-07
JPS5919327A	1984-01-31
JP2000164228A	2000-06-16

Mimura, Hidekazu (Takayasu Bldg. 15-1, Uchikanda 3-chom, Chiyoda-ku Tokyo, JP)

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