Study of parabolic rate constant of Mn-Co-CeO2 coated AISI 430 steel for SOFC interconnect application

Oxidation resistance of solid oxide fuel cells interconnects can be ameliorated by use of a protective, effective, relatively dense and well adherent spinel coating. In this study the electrodeposition method was employed to coat AISI 430 ferritic stainless steel. Isothermal oxidation and cyclic oxidation were applied to evaluate the parabolic rate constant (kp). The formation of Mn-Co oxides during oxidation improved oxidation resistance. The Mn-Co-CeO2 coated samples demonstrated lower kp in each test and it indicate that the coating layer has acted as a mass barrier against the outward diffusion of cations specially Cr.