High temperature corrosion of gas turbine blade material in methane gas combustion environment with the injection of SO2/NaCl

Liang Yan, Syuichi Inagaki, Yomei Yoshioka, Kunihiko Wada

Research output: Contribution to journalConference articlepeer-review

Abstract

Interest in the integrated coal gasification combined cycle plant (IGCC) has increased because of its high efficiency and lowered environmental pollution. There are, however, some corrosive contaminants in the fuel gas such as sulfur, NaCl salt and other ash impurities that cannot be removed completely. They cause a high temperature corrosion attack and reduce service life of the gas turbine components. This study focuses on the high temperature corrosion behavior of Ni-base single crystal alloy CMSX-4, the CoNiCrAIY coating, the TBC coating and the IN738LC Ni-base alloy in a methane gas combustion environment with the injection of SO2/NaCl at 730°C, 850°C, and 950° G Long-term experiments lasting up to 2700 hours were performed After these tests, surface deposits and reaction products were analyzed by X-ray diffraction (XRD), and cross sectional observation was performed by a scanning electron microscope (SEM) and an electron probe micro analyzer (EPMA). Results showed that sulfur and chlorine concentrated within the uncoated alloy of CMSX-4 and IN738LC, and the coatings exhibited good resistance to attacks by oxidation and sulfidation.

Original languageEnglish
JournalNACE - International Corrosion Conference Series
Volume2002-April
Publication statusPublished - 2002 Jan 1
Externally publishedYes
EventCorrosion 2002 - Denver, United States
Duration: 2002 Apr 72002 Apr 11

Keywords

  • Blade
  • Gas turbine
  • High temperature corrosion
  • IGCC
  • Oxidation
  • Sulfidation

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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