METALLIC SEPARATOR FOR FUEL CELL AND PROCESS FOR PRODUCING THE METALLIC SEPARATOR

摘要

This invention provides a metallic separator (1) for a fuel cell, produced by using a metallic base material (2) having a plane surface or having a surface at least a part of which is provided with a concaved gas flow passage. The metallic separator for a fuel cell comprises a metallic base material (2), an acid-resistant metallic film (3) provided on the surface of the metallic base material (2) and comprising at least one non-noble metal selected from Zr, Nb, and Ta, and an electroconductive alloy film (4) provided on the acid-resistant metallic film (3) and comprising at least one noble metal selected from Au and Pt and at least one non-noble metal selected from Zr, Nb, and Ta. There is also provided a process for producing a metallic separator for a fuel cell, comprising the step (S1) of forming an acid-resistant metallic film, and the step (S2) of forming an electroconductive alloy film. By virtue of the above constitution, a metallic separator for a fuel cell, having excellent acid resistance and low contact resistance, and a production process of the metallic separator, can be provided.