Oxidation and electrical behavior of ferritic stainless steel interconnect with Fe-Co-Ni coating by electroplating

► Fe-Co-Ni coating has been electroplated on ferritic stainless steel. ► (Fe,Co,Ni)3O4 spinel atop Cr2O3 was thermally grown on the steel with coating. ► The double-layer surface scale exhibited a high electrical conductivity. ► (Fe,Co,Ni)3O4 outer layer acted as an effective barrier to Cr outward migration. ► (Fe,Co,Ni)3O4 outer layer reduced the growth of the Cr2O3 inner layer.