To provide a titanium substrate and a fuel cell separator using the substrate, which can provide an effect that a low contact resistance can be maintained for a long time when used in the fuel cell separator, and which can provide this effect accurately, for example, even in different production lots.
A titanium substrate 2 for the fuel cell separator is made from titanium and titanium alloy and is used to fabricate a fuel cell separator 1. A precious metal alloy layer 3 made from an alloy, which contains in at least one kind of precious metal element selected from Au and Pt, at least one kind of non-precious metal element (5 to 65 atom%) selected from Nb, Ta, Zr, Ti, and Hf, is formed on the surface of the substrate and then heat-treated at a temperature of 300 to 800C. On the surface, the concentration of carbon which has a binding energy in a range of 280 to 284 eV measured by X-ray photoelectron spectroscopy analysis is 30 atom% or below.
SATO TOSHIKI
SUZUKI JUN
| JP2008177152A | 2008-07-31 | |||
| JP2009123528A | 2009-06-04 | |||
| JP2009087909A | 2009-04-23 | |||
| JP2008176988A | 2008-07-31 | |||
| JP2007317600A | 2007-12-06 | |||
| JP2007146250A | 2007-06-14 | |||
| JP2008108490A | 2008-05-08 |
Etsuo Tada
Tetsuo Tomita