| 摘要 |
PURPOSE:To improve corrosion resistance under a fused carbonate environment, by incorporating specific amounts of Si and Al into an Ni-type component material for fuel cell. CONSTITUTION:An Ni-type component material for fused carbonate fuel cell has a composition consisting of, by weight, 0.4-5% Si and/or 0.1-10% or 20-40% Al and the balance Ni or Ni-Cr with inevitable impurities. In this composition, Si has a function of strengthening an oxide film formed on the surface layer part of the material at a gas-liquid interface. When Al is incorporated by 0.1-10%, a stable alpha-phase in which Al is allowed to enter into solid solution in Ni is formed and, when 20-40%, a beta'-phase in which the ratio of Al to Ni is regulated to 1 to 1 is formed. By this material composition, corrosion resistance under a fused carbonate environment is improved, and, when oxidation treatment is further applied to the above material surface, corrosion resistance can be improved to a greater extent. |
