The effect of (La 0.85 Sr 0.15 ) 0.9 MnO 3 (LSM) coating layer on the electric properties of the Fe–16Cr alloy (SUS430) and Fecralloy® was examined in air. The LSM layer was coated on the Fe–Cr alloys by slurry-dipping process and was sintered at 1200 °C. When the LSM-coated SUS 430 was sintered in Ar atmosphere with H 2 , the phase separation of the LSM coating layer was observed, which increased the area specific resistance. The decomposed LSM phase changed to a stable phase with increasing the holding time at 750 °C in air. When the LSM-coated SUS 430 was heat-treated in air at 1000 °C after the sintering, the stable LSM-coated SUS 430 showed a low area-specific resistance (ASR) and maintained almost a constant value for 2600 h. The area specific resistances of the LSM-coated Fe–Cr alloys depend on the interfacial oxide layer formed between LSM and alloys. The LSM-coated Fecralloy® showed a much larger area-specific resistance due to the formation of Al-rich mixed interfacial oxide. It is concluded that the LSM-coated Fecralloy® made by sintering process is not adequate for metallic interconnect.