%0 Journal Article
%A Michael C Tucker
%A Fengyu Shen
%A Martha Welander
%B International Journal of Hydrogen Energy
%D 2023
%G eng
%T Oxidation of Porous Stainless Steel Supports for Metal-Supported Solid Oxide Electrolysis Cells
%8 03/2023
%X <p dir="ltr"><span>Oxidation behavior of porous P434L ferritic stainless steel, used for the fabrication of metal-supported solid oxide electrolysis cells (MS-SOEC), is studied under oxygen-side and steam-side conditions. The impact of oxygen content on the oxygen side and steam:hydrogen ratio on the steam side is determined at 700 °C for bare, as-sintered samples. For these conditions, oxidation is more aggressive in the steam-side atmosphere. Oxygen with 3% humidification and steam:hydrogen ratio of 90:10 are selected for further assessment with pre-oxidized, catalyst-coated, and CuMn</span><sub><span><span>1.8</span></span></sub><span>O</span><sub><span><span>4</span></span></sub><span>-coated samples. The rapid oxidation at 700 °C and breakaway oxidation at 600 °C observed for bare stainless steel in 90:10 steam:hydrogen is mitigated by pre-oxidizing the sample in air before exposure. In oxygen, addition of the catalyst or CuMn</span><sub><span><span>1.8</span></span></sub><span>O</span><sub><span><span>4</span></span></sub><span> coatings moderately increases the oxidation rate, due to consumption of Cr via reaction between the coatings and Cr-oxide scale. The results for ex-situ controlled oxidation are similar to oxidation observed after 1000 h operation of a full MS-SOEC. In general, the oxidation behavior at 700°C is found to be acceptable.</span></p><div><span><br /></span></div>