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DOE OSTI · 1869105

Comprehensive insights into competitive oxidation/sulfidation reactions on binary ferritic alloys at high temperatures

Stephan-Scherb, Christiane·Lehmusto, Juho·Falk, Florian·Sobol, Oded·Pint, Bruce A.
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Abstract

Interpreting high-temperature corrosion induced by mixed-gas atmospheres is challenging due to the different contributions of oxidizing gases. In this work, a comprehensive study on the combined oxidation/sulfidation using label molecules is presented. Fe-Cr model alloys with 2 wt% and 9 wt% Cr were isothermally exposed using a volumetric mixture of 0.5%S 16 O 2 /27%H 2 18 O and 0.5%S 16 O 2 /7%H 2 18 O at 650 °C for 5 h and then characterized by secondary ion mass spectroscopy (SIMS). Additionally, the reactions were followed in-situ utilizing energy dispersive X-ray diffraction. The study showed that both S 16 O 2 and H 2 18 O contribute to the oxidation of the alloys but to different extents depending on the Cr-content.

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36 MATERIALS SCIENCESEMSIMShigh-temperature corrosionironoxidationsteelsulphidation

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Stephan-Scherb, Christiane, Lehmusto, Juho, Falk, Florian, Sobol, Oded, Pint, Bruce A.. 2022-03-31. Comprehensive insights into competitive oxidation/sulfidation reactions on binary ferritic alloys at high temperatures. https://doi.org/10.1016/j.corsci.2022.110236

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