Solid oxide fuel cells (SOFC) are considered a promising technology for the production of clean energy. Ferritic stainless steels are widely used as interconnects in the SOFC stack. The development of volatile Cr-containing species, which can poison the cathode, as well as the steel oxidation at high temperature, are the main causes of degradation of the device. Manganese cobalt spinels have been proposed as protective coating materials for metallic interconnects due to their high electrical conductivity and the good CTE match with the steel. The doping of the spinel structure by transition metals leads to the modification of its properties, with the possibility to improve the coating performances.