Corrosion stability of ferritic stainless steels for solid oxide electrolyser cell interconnects

Palcut, Marian, Mikkelsen, Lars, Neufeld, Kai, Chen, Ming, Knibbe, Ruth and Hendriksen, Peter V. (2010) Corrosion stability of ferritic stainless steels for solid oxide electrolyser cell interconnects. Corrosion Science, 52 10: 3309-3320. doi:10.1016/j.corsci.2010.06.006

Author Palcut, Marian
Mikkelsen, Lars
Neufeld, Kai
Chen, Ming
Knibbe, Ruth
Hendriksen, Peter V.
Title Corrosion stability of ferritic stainless steels for solid oxide electrolyser cell interconnects
Journal name Corrosion Science   Check publisher's open access policy
ISSN 0010-938X
Publication date 2010-10-01
Year available 2010
Sub-type Article (original research)
DOI 10.1016/j.corsci.2010.06.006
Open Access Status Not yet assessed
Volume 52
Issue 10
Start page 3309
End page 3320
Total pages 12
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
Formatted abstract
Long-term oxidation behaviour of eight ferritic steels with 20-29 wt.% chromium (F 20 T, TUS 220M, AL 453, Crofer 22 APU, Crofer 22 H, Sanergy HT, E-Brite and AL 29-4C) has been studied. The samples were cut into square coupons, ground and annealed for 140-1000h at 1173K in flowing, wet hydrogen, air and pure oxygen. The reaction kinetics was followed by mass increase of individual samples over time. Parabolic rate law was observed for most measurements. The respective rate constants have been evaluated and compared. The chemical composition of the oxide scale was investigated by XRD and SEM/EDXS. The major constituent is chromium oxide. Other oxides, such as (Mn,Cr)3O4, MnTiO3, SiO2 or Al2O3, are also present in different amounts depending on the chemical composition of the steel. The oxidation rate increases with increasing oxygen partial pressure and decreasing chromium concentration. Chromium diffusion coefficients in Cr2O3 and parabolic rate constants are compared. The reaction mechanism for the chromia formation is suggested. The results are discussed with respect to the applications of the steels in a working solid oxide electrolyser cell stack. Furthermore, suggestions for the development of a superior alloy composition are given.
Keyword A. Stainless steel
B. X-ray diffraction
C. High temperature corrosion
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 2008-1-0045
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
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