Protective Coatings for Ferritic Stainless Steel Interconnect Materials in High Temperature Solid Oxide Electrolyser Atmospheres

Stainless steel interconnect materials used in solid oxide fuel cells and electrolysers need to be coated improve oxidation resistance mitigate Cr-vaporization. This work aimed explore the optimal steel/coating combinations suitable for use reversible stacks evaluated (Co,Mn)3O4 spinel, LaFeO3 perovskite, Ce/Co Y-based coatings, on AISI441 Crofer 22 APU steels. The coatings were based measurements of mass gain scale thickness after exposure at 700 800 °C side (90 vol.% H2O/10 H2) air/oxygen (pure O2) atmospheres. In pure O2, most efficient limiting formation Cr evaporation, compared bare steel, CeCo APU. 90 H2, coating showed largest improvement resistance.