| 摘要 |
The present invention provides a metallic bipolar plate for fuel cells, including: a pair of metallic plates for fuel cells each including a substrate which contains a stainless steel, an Fe-Ni based alloy or an Ni-base alloy, has a front surfa ce and a back surface, and has a plurality of channels of a reaction gas formed on the fro nt surface; and a brazed portion joining the back surfaces of the substrates in such a w ay that the pair of metallic plates are made to face each other, wherein, in the pair of metallic plates, a thin layer of a noble metal is coated on an entirety of the front surface of each of the substrates or on at least a part of a convex portion between the plurality of channels of a reaction gas on the front surface of each of the substrates, a nd another thin layer of a noble metal having a thickness of from 0.5 to 60 nm is coated on an entirety of the back surface of each of the substrates or on at least a part includin g the brazed portion on the back surface of each of the substrates, and wherein the metallic bipolar plate has, directly below a brazing material in the brazed portion, a joint portion where the thin layer of a noble metal is not present and the brazing material and the substrate are directly joined with each other. |
