Abstract
The poor steam oxidation resistance of P92 steel limits its long term application in 620 °C double reheat ultra-supercritical steam boilers. Aluminizing has been considered as one cost-effective solution to improve the oxidation resistance of substrate alloys without significantly worsening their mechanical performance. A modified aluminising was developed to form a thin β-FeAl layer on heat-resistant P92 steel under relatively lower temperatures. Oxidation behaviour of the layer and the P92 steel was probed in flowing pure steam vapour up to 500 h at 650 °C. An unstable Fe-rich oxide layer of over 100 μm in thickness grew on the steel, whereas only an extremely thin (<0.2 μm) and stable α-Al2O3 scale grew on the β-FeAl layer that ultimately evolved to FeCrAl solid solution phase during oxidation, implying great potentials of applying the β-FeAl coating for protecting practical boiler tubing systems against oxidation.
Sign-in/Register to access full text options 
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.
