Optimisation of Metallic Interconnects for Hydrogen Production by High Temperature Water Vapour Electrolysis
For economical and environmental reasons, hydrogen is considered as a major energetic vector for the future. Hydrogen production via high temperature water vapour electrolysis (HTE) is a promising technology. A major technical difficulty related to high temperature water vapour electrolysis is the development of interconnects working efficiently for a long period. Working temperature of 800°C enables the use of metallic materials as interconnects. Chromia forming alloys are among the best candidates. The interconnect material chosen in the present study is a ferritic stainless steel with 18% chromium content. High temperature corrosion resistance and electrical conductivity of the alloy was tested in both cathode (H2/H2O) and anode (O2/H2O) atmospheres. Corrosion products were then characterized by SEM-EDX and XRD. Moreover chromium evaporation measurements were carried out under anode atmosphere.
I. Bezverkhyy, S. Chevalier and O. Politano
M.R. Ardigo et al., "Optimisation of Metallic Interconnects for Hydrogen Production by High Temperature Water Vapour Electrolysis", Defect and Diffusion Forum, Vols. 323-325, pp. 239-244, 2012