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Failure Analysis of a Centrifugal Compressor Impeller Made of 17-4PH Steel in the Moist Hydrogen Sulfide Environment

Author

Listed:
  • Jakub Łagodziński

    (Institute of Turbomachinery, Lodz University of Technology, 90-924 Lodz, Poland)

  • Zbigniew Kozanecki

    (Institute of Turbomachinery, Lodz University of Technology, 90-924 Lodz, Poland)

  • Eliza Tkacz

    (Institute of Turbomachinery, Lodz University of Technology, 90-924 Lodz, Poland)

Abstract

The impeller under consideration is a rotor wheel of a centrifugal compressor, made of 17-4PH martensitic precipitated hardening stainless steel. Its total operating lifetime was estimated to 80,000 h, but it fractured beforehand, 4 days after the scheduled overhaul without any observed pre-symptoms. The important causes of the failure were its working conditions: a moist H 2 S environment, the applied shaft fitting stress, and the martensitic structure of its material. In the article the post-failure analysis of an impeller is described, explaining the root cause of the impeller failure by means of both experimental and Finite Element Methods (FEM). Sulfide Stress Cracking (SSC) was found to be the primary failure mechanism for the impeller under investigation. Details of the investigations and possible corrective measures to improve performance impellers used under harsh environment conditions are discussed.

Suggested Citation

  • Jakub Łagodziński & Zbigniew Kozanecki & Eliza Tkacz, 2022. "Failure Analysis of a Centrifugal Compressor Impeller Made of 17-4PH Steel in the Moist Hydrogen Sulfide Environment," Energies, MDPI, vol. 15(12), pages 1-11, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:12:p:4183-:d:833024
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