TITANIUM MATERIAL FOR SOLID POLYMER FUEL CELL SEPARATOR, AND PROCESS FOR PRODUCTION THEREOF

摘要

The present invention provides titanium material for a separator for solid polymer fuel cell use comprised of titanium which has a surface layer part where conductive compound particles are affixed, which is excellent in contact resistance between the separator surface and carbon paper and in durability, and which is low in cost and superior in recyclability and a method of production of the same. This titanium material for separator use has on the surface of the titanium base material a film comprised of the titanium compound particles made of titanium carbide, titanium nitride, or titanium carbonitride and titanium oxide. The film has a thickness of 0.1 to 1 µm, the coverage rate is an area percentage of 20% or more, and the contents of carbon and nitrogen in the film total 5 to 40 at%. The titanium material for a separator is produced by annealing or shot blasting and pickling.