Abstract
Advanced ultra-supercritical (AUSC) power plants with the capacity to produce cleaner and efficient energy require materials compatible for operating at temperature and pressure of 750 °C and 350 bar, respectively. Among various structural materials, Inconel 740H and Haynes 282 are two candidate alloys for the AUSC plant. The present study was designed to investigate the ambient pressure steam oxidation of these alloys at 700 °C by exposing them for 100, 250 and 500 h. Quantitative evaluation of both the alloys indicates a comparable and a significantly low parabolic oxidation growth rate (~ 10–8 mg2 cm−4 h−1). The degradation behaviour, in particular, the oxide growth, is dominated by the Cr2O3-rich outer layer and internal oxidation region rich with oxides of Al and Ti.
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Acknowledgements
The authors would like to acknowledge the microscopy facility available at the Advanced Facility for Microscopy and Microanalysis (AFMM) centre, Indian Institute of Science, Bangalore. One of the authors, KC, acknowledge the Science and Engineering Research Board, Govt. of India for the SERB Distinguished Fellowship that partially supports this work. The authors gratefully acknowledge funding by DST, Government of India for Project No.: TMD/CERI/Cleancoal/2017/034 (IISc) (C) (National Centre for Clean Coal Research and Development Project).
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Project No.: TMD/CERI/Cleancoal/2017/034 (IISc) (C), National Clean Coal Project, supported by DST, Government of India.
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PG and OPG carried out the experiments and characterization. PG analysed the data and wrote the manuscript. MPS, OPG and PG were involved in the setting up of the facility. MPS was involved in the conceptualization of the experiments and part of collegiate discussions. BB and KC conceptualized the project, reviewed the manuscript and contributed to scientific discussions.
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Gore, P., Gosain, O.P., Singh, M.P. et al. Towards Understanding the Oxide Evolution in Inconel 740H and Haynes 282 in Ambient Pressure Steam Oxidation. Oxid Met 97, 509–525 (2022). https://doi.org/10.1007/s11085-022-10103-9
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DOI: https://doi.org/10.1007/s11085-022-10103-9