Oxidation Behaviors of Different Grades of Ferritic Heat Resistant Steels in High-Temperature Steam and Flue Gas Environments

Li, Yong; Liu, Qu; Li, Shanlin; Cai, Zhipeng; Li, Kejian; Pan, Jiluan

doi:10.1007/s40195-021-01338-7

Cited by 6 publications

(4 citation statements)

References 47 publications

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“…In particular, based on the region where Cr elements are distributed in Fig. 5 (b), the region where Cr was detected was judged to be inner oxide (chromite) in agreement with the EPMA analysis [27]. As the Cr content in the steel increases, the overall thickness of oxide layer becomes thinner and the thickness of chromite oxide increases slightly.…”

Section: Resultssupporting

confidence: 76%

Effect of Cr Content on the High Temperature Oxidation of Low Alloy Steels

Kwon

Park

Choi

et al. 2023

Preprint

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In the case of low carbon steel (AISI 1015, AISI 8617, AISI 4115 steel), the high-temperature oxidation behavior at different temperatures (600, 700, 800, 900, 1000 ℃) was studied by mass gain analysis, phase analysis (metallographic microscope, energy-dispersive spectroscopy, and x-ray diffraction). The oxidation process was performed from 2 to 100 min. As the oxidation time increased, the trend of mass gain per unit area switched from linear to parabolic law regardless of steel grades used in this study. As the chromium content increases, the duration of time during which the oxidation rate follows a linear relationship decreases. The structure of oxides can generally be classified into two types: outer oxide and inner oxide. The outward diffusion of Fe cations primarily leads to the formation of outer oxide, while the inward diffusion of O anions is responsible for the formation of chromium and inner oxides. In the low-alloy steel with higher chromium content, the thickness of the mixed oxide layer containing Cr increased, and the oxidation rate decreased at all oxidation temperatures.

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Section: Resultssupporting

confidence: 76%

Effect of Cr Content on the High Temperature Oxidation of Low Alloy Steels

Kwon

Park

Choi

et al. 2023

Preprint

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Section: Resultssupporting

confidence: 75%

“…The magnetite phase (Fe:O = 3:4) and wüstite phase (Fe:O = 1:1) were prominent in all steel grades, ranging from 42.2:57.8~43.5:56.5 and 48.9:51.1~52.2:47.8 (at.%), respec tively. In particular, based on the region where Cr elements are distributed in Figure 7b the region where Cr was detected was judged to be inner oxide (chromite) in agreemen with the EPMA analysis [30]. As the Cr content in the steel increases, the overall thicknes of the oxide layer becomes thinner and the thickness of chromite oxide increases slightly Figure 9 is the EPMA component profile measured via the line scanning method with the atomic percentage of Fe, O, and Cr atoms used to analyze the components of the oxide layer of the oxidized specimens subjected to high-temperature oxidation at 1000 • C for 100 min.…”

Section: Resultssupporting

confidence: 64%

Influence of Cr Content on the High-Temperature Oxidation Behavior and Mechanism of Low-Alloy Steels

et al. 2023

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The high-temperature oxidation behavior of low-carbon steel (AISI 1015, AISI 8617, AISI 4115) was investigated over the temperature range from 600 to 1000 °C in humid air containing 25% water vapor. Mass gain of oxidation measurement was performed to study the oxidation kinetics. The microstructure, thickness, and composition of the oxide scale formed were investigated via optical microscope (OM), scanning electron microscope (SEM) equipped with an energy dispersive spectrometer (EDS), X-ray diffraction (XRD), and electron probe microanalyzer (EPMA). The oxidation process was performed from 2 to 100 min. As the oxidation time increased, the trend of mass gain per unit area switched from a linear to a parabolic law, regardless of the steel grade used. As the chromium content increased, the duration of time during which the oxidation rate followed a linear relationship decreased. In the low-alloy steel with higher chromium content, the thickness of the mixed oxide layer containing Cr increased and the oxidation rate decreased at all oxidation temperatures.

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“…The inner side of the tube is subjected to high-pressure steam that is oxidizing, corrosive, and has a scouring effect, whereas the outer side of the tube is exposed to combustion gases and ashes. Therefore, service materials must possess excellent oxidation properties in both environments [17][18][19][20][21]. However, the current application of SP2215 steel is still in its early stage, and the high-temperature oxidation resistance in the two different environments has not yet been deeply understood.…”

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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Oxidation Behaviors of Different Grades of Ferritic Heat Resistant Steels in High-Temperature Steam and Flue Gas Environments

Cited by 6 publications

References 47 publications

Effect of Cr Content on the High Temperature Oxidation of Low Alloy Steels

Effect of Cr Content on the High Temperature Oxidation of Low Alloy Steels

Influence of Cr Content on the High-Temperature Oxidation Behavior and Mechanism of Low-Alloy Steels

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

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