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

doi:10.3390/en15031168

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

Jyrki Mikkola (Corresponding Author), Karine Couturier, Belma Talic, Stefano Frangini, Nathalie Giacometti, Nathalie Pelissier, Bhaskar Reddy Sudireddy, Olivier Thomann

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Abstract

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/ox-ygen 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.

Original language	English
Article number	1168
Journal	Energies
Volume	15
Issue number	3
DOIs	https://doi.org/10.3390/en15031168
Publication status	Published - 1 Feb 2022
MoE publication type	A1 Journal article-refereed

Keywords

Degradation
Fuel cells
Interconnects
Protective coatings
Solid oxide cells

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "Protective Coatings for Ferritic Stainless Steel Interconnect Materials in High Temperature Solid Oxide Electrolyser Atmospheres",

abstract = "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/ox-ygen 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.",

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author = "Jyrki Mikkola and Karine Couturier and Belma Talic and Stefano Frangini and Nathalie Giacometti and Nathalie Pelissier and Sudireddy, {Bhaskar Reddy} and Olivier Thomann",

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AU - Frangini, Stefano

AU - Giacometti, Nathalie

AU - Pelissier, Nathalie

AU - Sudireddy, Bhaskar Reddy

AU - Thomann, Olivier

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N2 - 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/ox-ygen 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.

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

Abstract

Keywords

UN SDGs

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