TITANIUM ALLOY USED FOR SEPARATOR MATERIAL FOR FUEL CELL AND PRODUCTION METHOD OF SEPARATOR MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a titanium alloy used for a separator material for a fuel cell, which has low contact resistance to a carbon cloth without coating an electrically conductive material, and to provide a production method of the separator material for the fuel cell.SOLUTION: A titanium alloy used for a separator material for a fuel cell contains one or more elements selected from V, Nb, Ta, and W of 0.005-0.50 mass% in sum total, and the balance is titanium and inevitable impurities. Also a production method of the separator material for the fuel cell has: a titanium substrate fabricating step of fabricating the titanium substrate composed of the titanium alloy; a heat treatment step of heat-treating the titanium substrate in an atmosphere having the oxygen concentration of 0.5 vol.% or more and within the temperature range of 350-850°C; and a reduction treatment step of reduction-treating the heat-treated titanium substrate.