Abstract
Fe-30Mn-8Al and Fe-30Mn-8Al-2Cr alloys were exposed to mixed oxidant gaseous environments containing both oxygen and sulfur dioxide at 900°C. The microstructure of the reaction products formed on these alloys were examined by scanning electron microscopy (SEM) and x-ray mapping techniques. The scales formed on the Fe-30Mn-8Al alloy exposed to oxidizing/sulfidizing environments consist of duplex oxides structure with an outer (FeMn) 2O 3 layer and an inner α-Al 2O 3 layer at the oxide-alloy interface. This alloy does not undergo severe degradation by sulfidation after prolonged exposure in SO 2/O 2 gas mixture for 24 h. On the other hand, addition of Cr to the Fe-30Mn-8Al alloy leads to a substantial change in scale morphology. The results show that Cr addition promotes the formation and growth of the external fibrous (Mn, Cr) S sulfide and internal MnS sulfide within the substrate alloy.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
