| 摘要 |
Provided is a fuel cell separator material which can be used to form a firm and uniform Au layer or a layer containing Au on the surface of a titanium base and can assure electric conductivity, corrosion resistance, and durability required of a fuel cell separator. On the surface of a Ti base (2) is formed an alloy layer (6) containing Au and a first component containing at least one metal selected from a group consisting of Al, Cr, Fe, Co, Ni, Cu, Mo, Sn, and Bi, or an Au single layer (8). An intermediate layer (2a) containing Ti, O, the first component, and less than 20 mass % of Au is arranged between the alloy layer or the Au single layer and the Ti base. The alloy layer or the Au single layer has a region having a thickness of 1 nm or above from the uppermost surface toward the lower layer and containing 50 mass % or above of Au or a region having a thickness of 3 nm or above from the uppermost surface toward the lower layer and containing Au in the range from 10 to 50 mass %. Alternatively, the Au single layer has a thickness of 1 nm or above. |
