| 摘要 |
PURPOSE:To provide a separator masking material having excellent corrosion resistance against carbonates by cladding Al to the surface of a base of a specific metal, and subjecting the base to internal diffusion process in a nonoxidizing atmosphere, thus forming a layer of Al intermetallic compound. CONSTITUTION:Al 10 to 500mum thick is clad by cold welding to the surface of a base comprising a single or laminated plate made from at least one or two kinds selected from Fe or Fe alloys, stainless steel, and Ni or Ni alloys and thereafter the base is subjected to internal diffusion process in a nonoxidizing atmosphere of hydrogen and the like at 400-650 deg.C to form a layer of Al intermetallic compound. A separator main body 5 is sandwiched between a cathode side masking material 10 having a base made from stainless steel and an anode side masking material 11 having a base made from Ni. Unit cells each comprising an electrolyte plate 1 held from both sides by an air electrode 3 and a fuel electrode 2 via separators 5 are stacked one atop another to provide a fuel cell, the electrolyte plate 1 including electrolyte made from a molten carbonate of an alkali metal. |
