| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a separator material for a fuel cell, capable of forming firmly and uniformly a layer containing Au, while reducing a deposit amount of the Au onto a Ti base material surface, and capable of securing close contact property and corrosion resistance required in a separator for the fuel cell. <P>SOLUTION: A surface layer 6 containing Au and Cr is formed on the surface of a Ti base material 2, an intermediate layer 2a containing respectively Ti and O of 10 atm.% or more, the Au less than 20 atm.% and the Cr of 20 atm.% or more, exists at 1 nm or more of thickness between the surface layer and the Ti base material, the deposit amount of Au is 4,000 ng/cm<SP POS="POST">2</SP>or more and less than 70,000 ng/cm<SP POS="POST">2</SP>, and a thickness part t<SB POS="POST">B</SB>containing Cr of 20 atm.% or more is 30% or more with respect to total thickness t<SB POS="POST">A</SB>of the surface layer and the intermediate layer, in this surface treated Ti material. <P>COPYRIGHT: (C)2012,JPO&INPIT |
