ALLOY COATING FILM FOR METAL SEPARATOR OF FUEL CELL, METHOD FOR PRODUCING THE SAME, SPUTTERING TARGET MATERIAL, METAL SEPARATOR AND FUEL CELL

摘要

Disclosed is an alloy coating film for metal separators of fuel cells, which is characterized by containing at least one noble metal element selected from Au and Pt and at least one non-noble metal element selected from the group consisting of Ti, Zr, Nb, Hf and Ta, and having a thickness of not less than 2 nm. This alloy coating film for metal separators of fuel cells is further characterized in that the noble metal element/non-noble metal element atomic ratio is from 35/65 to 95/5. Also disclosed are a method for producing an alloy coating film for metal separators of fuel cells, a sputtering target material, a metal separator and a fuel cell. The alloy coating film for metal separators of fuel cells is excellent in corrosion resistance and productivity, while having low contact resistance. This alloy coating film for metal separators of fuel cells is capable of maintaining a low contact resistance for a long time even in a corrosive atmosphere.