| 摘要 |
The present invention provides a low-contact- resistance interface structure between a separator and a carbon material for a fuel cell, a carbon material and a separator used in the interface structure, and a production method for a stainless steel separator for a fuel cell. The present invention is a low-contact- resistance interface structure between a separator and a carbon material for a fuel cell, characterized by having a titanium nitride layer 0.1 to 200 .mu.m in thickness between the stainless steel separator and the carbon material contacting therewith. Further, the present invention is a method for producing a stainless steel separator incorporated in the above interface structure for a fuel cell, characterized by forming a titanium nitride layer 0.1 to 200 .mu.m in thickness on one or both surfaces of a stainless steel containing, in mass, C: 0.0005 to 0.03%, Si: 0.01 to 2%, Mn: 0.01 to 2.5%, S: 0.01% or less, P: 0.03% or less, Cr: 13 to 30%, and Ti: 0.05 to 5%, with the balance consisting of Fe and unavoidable impurities, by applying a nitriding treatment to the stainless steel, in an atmosphere gas containing nitrogen, after the stainless steel is formed into a prescribed shape. |
