| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a titanium base material for a fuel cell separator for maintaining low contact resistance for a long period even though a titanium plate with high carbon density on the surface is used, a fuel cell separator using the base material, and its manufacturing method. <P>SOLUTION: The titanium base material 1 for the fuel cell separator is used for a fuel cell separator 11 having a noble metal film 12, and includes the titanium plate 2 made of pure titanium wherein carbon density having bonding energy of 280-284 eV measured by a X-ray photoelectron spectroscopic analysis from the surface to designated depth is 5 atom% or more, or a titanium alloy, a metal film 3 of film thickness of 15-500 nm formed on the surface of the titanium plate 2 and made of one or more metals selected from titanium and zirconium, and an oxide film 4 formed on the surface of the metal film 3 and made of metal oxide. <P>COPYRIGHT: (C)2010,JPO&INPIT |
