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<p>The oxidation kinetic behavior of the Haynes-230 alloy used in hot combustion components for very long-term high-temperature oxidation behavior is important for elevated temperature usage of Haynes-230 alloy. In situ oxidation behavior of Haynes-230 alloys subjected to high-temperature (800, 1000, and 1200&#xa0;°C) exposures in a customized furnace setup equipped with electrochemical impedance spectroscopy (EIS) is investigated. Phase analysis, surface morphology, and chemical composition of the heat-treated samples were evaluated using x-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive x-ray spectroscopy (EDS). The various forms of surface oxide layer formation were also investigated using Raman spectroscopy. The EIS method was also utilized to evaluate the oxidation behavior of Haynes-230 at various temperatures and time durations. Furthermore, the oxidation kinetics of the alloy were investigated under thermal loading and unloading conditions, while the capacitive behavior was observed under unloading conditions, and a maximum charge transfer resistance is 27.83 × 10<sup>6</sup> observed at 1200&#xa0;°C-24&#xa0;h with activation energy of 182&#xa0;kJ/mol.</p>

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High-Temperature In Situ Oxidation Kinetics of Haynes-230 Alloy Investigated by Electrochemical Impedance Spectroscopy

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • S. Kathiravan,
  • Gobi Saravanan Kaliaraj,
  • Rittin Abraham Kurien

摘要

The oxidation kinetic behavior of the Haynes-230 alloy used in hot combustion components for very long-term high-temperature oxidation behavior is important for elevated temperature usage of Haynes-230 alloy. In situ oxidation behavior of Haynes-230 alloys subjected to high-temperature (800, 1000, and 1200 °C) exposures in a customized furnace setup equipped with electrochemical impedance spectroscopy (EIS) is investigated. Phase analysis, surface morphology, and chemical composition of the heat-treated samples were evaluated using x-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive x-ray spectroscopy (EDS). The various forms of surface oxide layer formation were also investigated using Raman spectroscopy. The EIS method was also utilized to evaluate the oxidation behavior of Haynes-230 at various temperatures and time durations. Furthermore, the oxidation kinetics of the alloy were investigated under thermal loading and unloading conditions, while the capacitive behavior was observed under unloading conditions, and a maximum charge transfer resistance is 27.83 × 106 observed at 1200 °C-24 h with activation energy of 182 kJ/mol.