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Erschienen in:
2017 | OriginalPaper | Buchkapitel
Fireside Corrosion Behaviors of Inconel 740H Superalloy in Various SO2 Contents
verfasst von : Jin-tao Lu, Yan Li, Zhen Yang, Jin-yang Huang, Ming Zhu, Y. Gu
Erschienen in: Energy Materials 2017
Verlag: Springer International Publishing
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Abstract
Fireside corrosion behavior of Inconel 740H superalloy was studied at 750 °C in simulated coal ash/flue gas environments by means of XRD, SEM and EDS. The results indicated that the corrosion behavior was strongly related to the SO2 levels and was significantly affected by NaCl additions. In presence of the atmospheres with 0.1%SO2, the alloy exhibited the highest corrosion resistance due to formation of a stable and dense Cr2O3 film. In present of the atmosphere with 1.5%SO2, however, a non-coherent and porous Cr2O3 film was formed. The thickness of film and internal sulfides were substantially increased. The mechanism of ash corrosion formation was also discussed.