Protective Coatings for Ferritic Stainless Steel Interconnect Materials in High Temperature Solid Oxide Electrolyser Atmospheres
Jyrki Mikkola,
Karine Couturier,
Belma Talic,
Stefano Frangini,
Nathalie Giacometti,
Nathalie Pelissier,
Bhaskar Reddy Sudireddy,
Olivier Thomann
Affiliations
Jyrki Mikkola
Fuel Cells and Hydrogen Team, VTT Technical Research Centre of Finland Ltd., P.O. Box 1000, 02044 Espoo, Finland
Karine Couturier
CEA (Atomic Energy and Alternative Energies Commission)-LITEN (Innovative Laboratory for New Energies Technologies and Nanomaterials), Université Grenoble Alpes, 38054 Grenoble, France
Belma Talic
Department of Energy Conversion and Storage, Technical University of Denmark, Anker Engelunds Vej 301, 2800 Kongens Lyngby, Denmark
Stefano Frangini
ENEA (Energia Nucleare ed Energie Alternative), CR (Casaccia Centro Ricerche), TERIN-PSU-ABI, 00123 Rome, Italy
Nathalie Giacometti
CEA (Atomic Energy and Alternative Energies Commission)-LITEN (Innovative Laboratory for New Energies Technologies and Nanomaterials), Université Grenoble Alpes, 38054 Grenoble, France
Nathalie Pelissier
CEA (Atomic Energy and Alternative Energies Commission)-LITEN (Innovative Laboratory for New Energies Technologies and Nanomaterials), Université Grenoble Alpes, 38054 Grenoble, France
Bhaskar Reddy Sudireddy
Department of Energy Conversion and Storage, Technical University of Denmark, Anker Engelunds Vej 301, 2800 Kongens Lyngby, Denmark
Olivier Thomann
Fuel Cells and Hydrogen Team, VTT Technical Research Centre of Finland Ltd., P.O. Box 1000, 02044 Espoo, Finland
Stainless steel interconnect materials used in solid oxide fuel cells and electrolysers need to be coated to improve oxidation resistance and to mitigate Cr-vaporization. This work aimed to explore the optimal steel/coating combinations suitable for use in reversible solid oxide stacks and evaluated (Co,Mn)3O4 spinel, LaFeO3 perovskite, Ce/Co and Y-based coatings, on AISI441 and Crofer 22 APU steels. The coatings were evaluated based on measurements of mass gain and oxide scale thickness after exposure at 700 and 800 °C to fuel side (90 vol.% H2O/10 vol.% H2) and air/oxygen side (pure O2) atmospheres. In pure O2, the most efficient coatings for limiting oxide scale formation and Cr evaporation, compared to the bare steel, were (Co,Mn)3O4 and CeCo on Crofer 22 APU. In 90 vol.% H2O/10 vol.% H2, the Y-based coating showed the largest improvement in oxidation resistance.
