Oxidation behavior of selected FeCr alloys in environments relevant for solid oxide electrolysis applications

摘要: If society is to move towards using more renewable energy sources the power fluctuations of e.g. wind and solar need be balanced. Energy storage by production hydrogen from solid oxide electrolysis cells (SOEC) offers a solution overcome these obstacles. However, performance current SOECs decreases too fast for technology commercialized. This drop in over time partly due degradation metallic interconnects (bipolar plates) within cell stacks. study investigates corrosion selected ferritic steels simulated SOEC environments. Ferritic have many properties that are desirable but suffer oxidation chromium evaporation time. Four different FeCr alloys been exposed partial pressures dry O2 (anode side) 34% H2O -3% H2-Ar (cathode at 850°C gravimetrical measurements performed rates. Chromium has measured compared oxygen containing was found vary largely with pressure, while rate did not substantially pressures. Differences behavior were observed between exposures H2 -Ar. Both reduced increased rates steam environment environments materials. Keywords: Solid cell, SOEC, SOFC, degradation, high temperature corrosion, evaporation, denuder technique