Understanding the excellent corrosion resistance of Fe-12Cr ODS alloys with and without Si in supercritical CO2 through advanced characterization

Wang, You; Zhou, Zhangjian; Jia, Haodong; Gao, Rui; Ran, Minrui; Zheng, Wenyue; Zhang, Mengchao; Li, Hui; Zhang, Jianqiang; Zeng, Xiaoqin; Shen, Zhao

doi:10.1016/j.corsci.2022.110827

Cited by 13 publications

(2 citation statements)

References 37 publications

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“…The cross-sectional morphology of the cladding layer shows that the surface of the cladding layer of the four Ni-Cr-Si alloys at all temperatures is dominated by the Cr 2 O 3 layer, and the addition of Si improves the stability of Cr 2 O 3 in the molten salt. Katharina et al [20] and Wang et al [21] pointed out that "Si can act as a nucleation site for Cr and accelerates the formation of dense Cr 2 O 3 layer. Moreover, the addition of Si enhances the activity of Cr in the matrix", which is consistent with the conclusions obtained from this work.…”

Section: Discussionmentioning

confidence: 99%

High-Temperature Corrosion Characteristics of Ni-20Cr-xSi Alloy Laser Cladding Layer in NaCl-KCl-Na2SO4-K2SO4 Mixed Salt Environment

Chen

Liu

2023

Coatings

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Ni-Cr-Si-alloy-cladding layers with Si contents of 0 wt.%, 1 wt.%, 3 wt.% and 5 wt.% were prepared via a laser-cladding technique, and the effect of Si content on the high-temperature corrosion resistance of the Ni-20Cr-Si-alloy-cladding layers in NaCl-KCl-K2SO4-Na2SO4 mixed salt was systematically investigated. The results show that at 600 °C, the four cladding layers rely mainly on the generation of dense Cr2O3 on the surface to hinder the continuation of corrosion. The addition of Si helps to improve the stability of Cr2O3 in the mixed salt, and on the other hand Si is enriched in the corrosion layer, which can effectively hinder the penetration of the corrosive medium. The addition of Si can effectively improve the high-temperature corrosion resistance of the Ni-20Cr-cladding layer, whereas the corrosion product layer is prone to spalling when the Si content is ≥3 wt.%. The best corrosion resistance was demonstrated by Ni-20Cr-1Si in NaCl-KCl-K2SO4-Na2SO4 mixed salt.

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Section: Discussionmentioning

confidence: 99%

High-Temperature Corrosion Characteristics of Ni-20Cr-xSi Alloy Laser Cladding Layer in NaCl-KCl-Na2SO4-K2SO4 Mixed Salt Environment

Chen

Liu

2023

Coatings

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“…However, the particle size of Y 2 O 3 is usually large, and thus the strengthening effect is limited. The addition of microalloying elements such as Ti, Zr, Al, Si, Hf, and Ta changes the behavior of Y 2 O 3 , and has an important influence on the composition, size, and distribution of dispersed particles, thus affecting the mechanical properties and irradiation resistance of the alloys [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. Compared with Ti and Al, Zr is more easily combined with Y 2 O 3 , to form ternary complex oxides, and Y–Zr–O is more stable, because of its high binding energy [ 27 , 28 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Y4Zr3O12-Added Fe–13.5Cr–2W Oxide-Dispersion-Strengthened Steels, Containing High Contents of C and N, Prepared by Mechanical Alloying and Two-Step Spark Plasma Sintering

Huang

Zhang

et al. 2023

Materials

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Oxide-dispersion-strengthened (ODS) steel is considered as a promising candidate structural material for nuclear applications. In this study, the microstructure and mechanical properties of Y4Zr3O12-added Fe–13.5Cr–2W ODS steels, containing high contents of C and N, prepared by mechanical alloying (MA) and two-step spark plasma sintering (SPS), were investigated. The results showed that pure Y4Zr3O12 powders, with a grain size of 3.5 nm, were well prepared with NH3·H2O addition by the sol-gel method in advance, in order to avoid the formation of some coarse or undesired oxides. W was completely dissolved into the matrix after 48 h of ball milling at 300 rpm, and the main elements were uniformly distributed on the surface of the milled powders. The unexpected face-centered cubic (FCC, γ)/body-centered cubic (BCC, α) dual-phase structure of the sintered specimens, could be explained by the unexpectedly high contents of C and N from the raw powder production process, fast-sintering characteristic of SPS, and inhibitory effect of W on the diffusion of C. The experimental results were approximately consistent with the simulation results from the Thermo Calc software. The temperature combination of 800 °C and 1100 °C during the SPS process, provided a relatively more homogeneous microstructure, while the combination of 750 °C and 1150 °C, provided the highest ultimate tensile strength (UTS), of 1038 MPa, with the highest uniform elongation (UE), of 6.2%. M23C6, Cr2O3, M2(C,N), and other precipitates, were mainly distributed at grain boundaries, especially at the triple junctions, which led to Cr depletion at grain boundaries.

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Effect of solution annealing and Al addition on the corrosion behavior of austenitic stainless steel in supercritical carbon dioxide at high temperature

Bin Wu,

Li,

Zhang

et al. 2024

Corrosion Science

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Understanding the excellent corrosion resistance of Fe-12Cr ODS alloys with and without Si in supercritical CO2 through advanced characterization

Cited by 13 publications

References 37 publications

High-Temperature Corrosion Characteristics of Ni-20Cr-xSi Alloy Laser Cladding Layer in NaCl-KCl-Na2SO4-K2SO4 Mixed Salt Environment

High-Temperature Corrosion Characteristics of Ni-20Cr-xSi Alloy Laser Cladding Layer in NaCl-KCl-Na2SO4-K2SO4 Mixed Salt Environment

Microstructure and Mechanical Properties of Y4Zr3O12-Added Fe–13.5Cr–2W Oxide-Dispersion-Strengthened Steels, Containing High Contents of C and N, Prepared by Mechanical Alloying and Two-Step Spark Plasma Sintering

Effect of solution annealing and Al addition on the corrosion behavior of austenitic stainless steel in supercritical carbon dioxide at high temperature

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