Nano Coatings on AISI 430 to Reduce Cr2O3Growth for SOFC Interconnect Applications

The formation of oxide layer on the surface of used interconnects in solid oxide fuel cells (SOFCs), decrease the electrical conductivity and therefore energy losses can be occurred. The aim of this study was to compare the effect of two types of coating layer on the growth of chromia layer. AISI 430 ferri&c stainless steel was coated in a cobalt and manganese-base pack mixture by pack cementation, separately. Isothermal and cyclic oxida&on were applied at 800 °C to evaluate the oxide layer thickness. The cobalt coating transformed to MnCo2O4 and CoCr2O4 spinels during isothermal oxidation and manganese coating transformed to Mn3O4 and MnFe2O4nano spinels. Results showed that the increase of isothermal oxidation time and cycle number increased the oxide thickness. Also in each test the cobalt coating showed lower oxide thickness in comparison to the manganese coating.

کلیدواژه ها:

chrimia (Cr2O3) ، AISI 430 stainless steel ، nano spinel ، oxide thickness ، interconnects