Influence of temperature on the oxidation behaviour of a ferritic-martensitic steel in supercritical water

Zhu, Zhongliang; Xu, Hong; Jiang, Dongfang; Mao, Xue Ping; Zhang, Naiqiang

doi:10.1016/j.corsci.2016.10.020

Cited by 58 publications

(31 citation statements)

References 37 publications

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“…Again, a bilayered oxide structure was reported. By increasing the pressure, it seems that the porosity increased but by increasing the exposure time, this phenomenon tends to stabilize [14]. Moreover, Zhu et al have tested the P92 ferritic-martensitic steel in deaerated supercritical water under the same pressure but at 650°C which corresponds to the maximal operating temperature of this alloy.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, Zhu et al have tested the P92 ferritic-martensitic steel in deaerated supercritical water under the same pressure but at 650°C which corresponds to the maximal operating temperature of this alloy. The magnetite/spinel-mixed structure was non adherent and internal oxidation phenomenon of the substrate was noticed [14]. Furthermore, above 600°C, evaporation of volatile CrO 2 (OH) 2 species became significant and the breakdown of the oxide layer formed occurred [6,15].…”

Section: Introductionmentioning

confidence: 99%

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Steam oxidation of aluminide coatings under high pressure and for long exposures

2018

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B2-FeAl-based aluminide coatings were elaborated on P92 ferritic-martensitic steels by slurry. Under atmospheric pressure of steal and 650°C, a thin protective α-Al 2 O 3 oxide layer formed and was maintained until 5000 h. With increasing pressure to 300 bar, the morphology of α-Al 2 O 3 changed markedly. Iron oxide clusters started to appear at the surface of the scale after 5000 h of exposure and kept on growing till 10000 h. It appears that pressure increased the outward diffusion of Fe through the coating and through the oxide scale and fostered the propagation of the tensile cracks of the coating.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Steam oxidation of aluminide coatings under high pressure and for long exposures

2018

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“…Hence, it seems that there was a tendency for the voids to heal with increasing oxidation time. Likewise, the oxidation of P92 in SCW shows the similar phenomenon [14]. According to Figure 3(f), it can be seen that the oxide next to the grain boundary humps compared to the oxide located at the center of the grain.…”

Section: Resultsmentioning

confidence: 55%

“…According to Figure 3(f), it can be seen that the oxide next to the grain boundary humps compared to the oxide located at the center of the grain. The oxidation mechanism of F-M steels in SCW has been discussed in several articles [4][5][6]14]. It was proposed that outer oxides grow by predominant outward diffusion of metal ions with new oxide formation occurring at the oxide/SCW interface.…”

Section: Resultsmentioning

confidence: 99%

“…However, the growth of the outer oxide layer is mainly dependent on outward diffusion of metal ions through the oxide lattice instead of via grain boundary diffusion at longer times because of the formation of large grains (see Figure 3(d) and 3(f). The transformation of the dominant diffusion path of the metal ion in the oxide scale may be responsible for the healing of the voids on the surface of the samples [14].…”

Section: Resultsmentioning

confidence: 99%

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Oxidation Behavior of Ferritic Steel T22 Exposed to Supercritical Water

Zhu

Khan

Cao

et al. 2018

High Temperature Materials and Processes

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The oxidation tests of Ferritic Steel T22 exposed to supercritical water (SCW) at 540–620°C and 25 MPa was performed for up to 1000 h. The oxidation rate increased with increasing exposure temperature and time. Oxide films formed on T22 have a double-layered structure with an outer layer consisting of iron oxide and an inner layer consisting of spinel oxide. Numerous pores on the surface can be observed at the initial oxidation stage while they seemed to heal with increasing exposure time at 620°C. Cracks occurred along grain boundaries in the oxide scale when T22 exposed for 200 h at 620°C. The influence of time and temperature on the oxidation of Ferritic Steel T22 was discussed.

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Oxidation behavior of austenitic steel Sanicro25 and TP347HFG in supercritical water

Zhu

Jiang²,

et al. 2019

Materials & Corrosion

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Oxidation tests of austenitic steel Sanicro25 and TP347HFG were implemented at 600–700 °C in supercritical water under 25 MPa without dissolved oxygen. With an increase in temperature, the weight change of TP347HFG steel increases significantly while the weight change of Sanicro25 increases relatively slow. A double layer oxide scale formed on TP347HFG and Sanicro25 steel, which was composed of Fe‐rich oxide layer and a Cr‐rich inner oxide layer. Small amount of Cr2O3 was observed for TP347HFG but a continuous Cr2O3 formed at interface of oxide and matrix for Sanicro25 at 600 and 700 °C. Furthermore, Fe2O3 is detected at 600–700 °C for Sanicro25. The effect mechanism of temperature and the Cr content on oxidation rate and oxide composition were discussed.

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Influence of temperature on the oxidation behaviour of a ferritic-martensitic steel in supercritical water

Cited by 58 publications

References 37 publications

Steam oxidation of aluminide coatings under high pressure and for long exposures

Steam oxidation of aluminide coatings under high pressure and for long exposures

Oxidation Behavior of Ferritic Steel T22 Exposed to Supercritical Water

Oxidation behavior of austenitic steel Sanicro25 and TP347HFG in supercritical water

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