Abstract
Kinetics of oxidation of Fe-Cr steel containing 25 wt.-percent Cr was studied as a function of temperature (1023–1173 K) for up to 480 h in flowing air, which corresponds to SOFC cathode environment operating conditions. The oxidation process was found to be a parabolic, suggesting that the diffusion of ionic defects in the scale is the slowest, rate determining step and it occurs predominantly by short-circuit diffusion paths. Comparison of the determined activation energy of oxidation of the studied steel with literature data indicates that at 1098–1173 K the chromia scale grows by the outward solid-state diffusion of chromium interstitials, whereas at 1023–1098 K — through a significant contribution of counter-current oxygen/chromium diffusion along Cr2O3 grain boundaries. The oxide scales were composed mainly of Cr2O3 with a continuous thin Mn1.5Cr1.5O4 spinel layer on top of the chromia scale. The oxidation test results on Fe-25Cr steel demonstrate the applicability of the commercial type DIN 50049 stainless steel as interconnect for SOFC.
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References
W. J. Quaddakkers, H. Greiner and W. Köck, Proceedings 1st European Solid Oxide Fuel Cell Forum, Lucerne, Switzerland, European SOFC Forum Secretariat, Baden, Switzerland, 1994, p. 525.
T. Kadowaki, T. Shiomitsu, E. Matsuda, H. Nakagawa, H. Tsuneizumi and T. Maruyama, Solid State Ionics, 67 (1993) 65.
L. Mikkelsen, P. H. Larsen and S. Linderoth, J. Therm. Anal. Cal., 64 (2001) 879.
K. Przybylski, J. Prażuch, T. Brylewski and T. Maruyama, Proceedings 14th International Corrosion Congress, CorrISA, Cape Town, South Africa, Vol. 2, 1999, p. 1.
T. Brylewski, M. Nanko, T. Maruyama and K. Przybylski, Solid State Ionics, 143 (2001) 131.
W. Z. Zhu and S. C. Deevi, Mat. Sci. Eng., A 348 (2003) 227.
N. Q. Minh and T. Takahashi, Science and Technology of Ceramic Fuel Cells, Elsevier, Amsterdam 1995.
P. Kofstad, High Temperature Corrosion, Elsevier, New York 1988.
W. C. Hagel, Trans. Am. Soc. Metals, 56 (1963) 583.
W. C. Hagel and A. W. Seybolt, J. Electrochem. Soc., 108 (1961) 1246.
K. Przybylski and G. J. Yurek, Mater. Sci. Forum, 43 (1989) 1.
D. Mortimer and W. B. A. Sharp, Br. Corros. J., 3 (1968) 61.
W. C. Hagel, J. Am. Ceram. Soc., 48 (1965) 70.
M. G. E. Cox, B. McEnanay and V. D. Scott, Phil. Mag., 26 (1972) 839.
M. Oku, S. Nakamura and N. Hiramatsu, Mater. High Temp., 18(S) (2001) 153.
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Brylewski, T., Dąbek, J. & Przybylski, K. Oxidation kinetics study of the iron-based steel for solid oxide fuel cell application. Journal of Thermal Analysis and Calorimetry 77, 207–216 (2004). https://doi.org/10.1023/B:JTAN.0000033205.69427.8e
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DOI: https://doi.org/10.1023/B:JTAN.0000033205.69427.8e