Corrosion Failures in Gas Turbine Hot Components
Gas turbines and other types of combustion turbomachinery are susceptible to hot corrosion at elevated temperatures. Two such cases resulting in the failure of a gas turbine component were investigated to learn more about the hot corrosion process and the underlying failure mechanisms. Each component was analyzed using optical and scanning electron microscopy, energy dispersive spectroscopy, mechanical testing, and nondestructive techniques. The results of the investigation provide insights on the influence of temperature, composition, and microstructure and the contributing effects of high-temperature oxidation on the hot corrosion process. Preventative measures are also discussed.
E. Kosieniak, K. Biesiada, J. Kaczorowski, M. Innocenti, Corrosion Failures in Gas Turbine Hot Components, Handbook of Case Histories in Failure Analysis, Vol 3, Edited By Larry Berardinis, ASM International, 2019, p 521–528, https://doi.org/10.31399/asm.fach.v03.c9001827
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