Corrosion behaviour of nitrided ferritic stainless steels for use in solid oxide fuel cell devices

Research output: Contribution to journalArticlepeer-review

Authors

  • Manuel Bianco
  • Stephane Poitel
  • Shicai Yang
  • Zhujun Wang
  • Marc Willinger
  • Jan Van Herle

Colleges, School and Institutes

External organisations

  • École Polytechnique Fédérale de Lausanne (EPFL)
  • Korean Institute of Energy Research (KIER)
  • TEER COATINGS LIMITED
  • Fritz-Haber-Institut der Max-Planck-Gesellschaft
  • EPFL

Abstract

Plasma nitriding was applied to ferritic stainless steel substrates to improve their performances as interconnects for solid oxide fuel cell devices. The samples underwent electrical conductivity test and SEM/EDS, TEM/EDS, environmental-SEM analyses. The first stages of corrosion were recorded in-situ with the e-SEM. Nitriding is effective in limiting the undesired chromium evaporation from the steel substrates and accelerates the corrosion kinetics, but its influence of the electrical conductivity is ambiguous. No intergranular corrosion is found in the steel substrate after long time operation. Nitriding helps commercially competitive porous coating to improve chromium retention properties of metal interconnects.

Details

Original languageEnglish
Article number108414
Number of pages10
JournalCorrosion Science
Volume165
Early online date10 Jan 2020
Publication statusPublished - 1 Apr 2020

Keywords

  • High temperature corrosion, Nitriding, Oxide coatings, Stainless steel, TEM