Patent ID: 7981561

Claim:
An interconnect for solid oxide fuel cells comprising: (a) at least one via that when subjected to an oxidizing atmosphere at a temperature of at least 650° C. develops a scale comprising a manganese-chromate spinel on at least a portion of a surface thereof, and (b) at least one gas flow channel, wherein at least a portion of a surface of the at least one gas flow channel is electropolished, and wherein when subjected to an oxidizing atmosphere at a temperature of at least 650° C. at least a portion of a surface of the at least one gas flow channel develops an aluminum-rich oxide scale, the aluminum-rich oxide scale comprising iron and chromium and having a hematite structure; the interconnect being formed from a ferritic stainless steel comprising from 0.2 to 4 weight percent manganese, from 0.3 to 1 weight percent aluminum, and at least one rare earth element, provided that the ferritic stainless steel comprises a total of at least 0.03 weight percent of rare earth elements.