Chromium evaporation and oxidation characteristics of alumina-forming austenitic stainless steels for balance of plant applications in solid oxide fuel cells. (15th June 2021)

• Record Type: Journal Article
• Authors: Zhou, Lingfeng; Zeng, Zhipeng; Brady, Michael P.; Leonard, Donovan N.; Meyer, Harry M.; Yamamoto, Yukinori; Li, Wenyuan; Collins, Greg; Liu, Xingbo
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 41(2021)
• Page Start: 21619
• Page End: 21633
• Publication Date: 2021-06-15
• Subjects: Chromium evaporation -- Alumina scale -- Oxidation kinetics -- Solid oxide fuel cell; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.04.002
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The chromium (Cr) evaporation behavior of several different types of iron (Fe)-based AFA alloys and benchmark Cr2 O3 -forming Fe-based 310 and Ni-based 625 alloys was investigated for 500 h exposures at 800 °C to 900 °C in air with 10% H2 O. The Cr evaporation rates from alumina-forming austenitic (AFA) alloys were ~5 to 35 times lower than that of the Cr2 O3 -forming alloys depending on alloy and temperature. The Cr evaporation behavior was correlated with extensive characterization of the chemistry and microstructure of the oxide scales, which also revealed a degree of quartz tube Si contamination during the test. Long-term oxidation kinetics were also assessed at 800 to 1000 °C for up to 10, 000 h in air with 10% H2 O to provide further guidance for SOFC BOP component alloy selection. Highlights: Cr evaporation and oxidation behaviors of AFA alloys were studied. Cr evaporation rates from AFA alloys were much lower than chromia-forming alloys. Continuous alumina layer formed on AFA alloys remained steady after test. Possible Si contamination and Cr deposited on alumina tubes were discussed.