Effect of Spallation on Oxidation Kinetics of Heat-Resistant Cr–Ni Austenitic Steels on Air and Combustion Atmosphere

Lekakh, Semen Naumovich; Oleg, Neroslavsky,; Li, Mei; Godlewski, Larry; Zhu, Wenhui

doi:10.1007/s11085-022-10139-x

Cited by 5 publications

(1 citation statement)

References 24 publications

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“…The oxidation resistance of an alloy is directly related to the nature of the oxide layer formed on its surface [22,23]. The high-temperature oxidation behavior of metals is influenced by many factors, such as the oxidation temperature and the atmosphere [6,24], surface treatment [25][26][27], and grain size [28]. Fujikawa et al [29] reported that steel with a coarse grain tends to peel off easily during the cooling process at 850 • C. Li et al [30] found a spalling oxidation layer on Super304H formed under steam at 605 • C due to the difference in the internal and external expansion coefficients, with oxidation products consisting of an inner layer of chromium oxide and an outer layer of iron oxide.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Steam and Atmospheric Oxidation Characteristic of a Heat-Resistant SP2215 Steel

Xu,

Wu,

Huang

et al. 2024

Coatings

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The high-temperature oxidation performance of SP2215 has become an important issue when they were used as superheaters and reheaters exposed to two different high-temperature environments. In this study, the oxidation behavior of SP2215 steel was investigated under steam and an atmosphere of 650–800 °C for 240 h. The microstructural and chemical characterization of the samples were performed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), a glow discharge optical emission spectrometer (GD-OES), and atomic force microscope (AFM). The kinetic curves of oxidation revealed excellent oxidation resistance under both environments, but significant different oxidation characteristics, oxide film composition, and structure were obvious. In the steam experiment, selective intergranular oxidation was evident at relatively low temperatures, which was attributed to the preference absorption of supercritical water molecules at the grain boundary. Conversely, a double-layer structure of outer Fe2O3 and a small amount of Fe3O4 and inner Cr2O3 was formed uniformly at 800 °C. In the high-temperature atmosphere experiment, a protective chromium film was dominant at 650–700 °C, and a loose multicomponent oxide film was formed at 750–800 °C, primarily consisting of Cr2O3, spinel FeCr2O4, and CuO.

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