Transmission electron microscopy study of complex oxide scales on DIN 1.4970 steel exposed to liquid Pb-Bi eutectic

Charalampopoulou, Evangelia; Delville, Rémi; Verwerft, Marc; Lambrinou, Konstantina; Schryvers, D.

doi:10.1016/j.corsci.2018.10.018

Cited by 62 publications

(19 citation statements)

References 31 publications

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“…The high solubility of steel alloying elements, especially Ni and Cr, besides Fe itself, leads to corrosion attacks increasing with rising temperatures [28,[34][35][36]. One possible mitigation solution, valid within a limited temperature window, is an active fluid conditioning by means of an appropriate oxygen concentration in the HLM, allowing for an in-situ formation of protective oxide scales [29,37,38,104]. Thus, below 500°C, both austenitic (e.g.…”

Section: Introductionmentioning

confidence: 99%

Corrosion resistance and microstructural stability of austenitic Fe–Cr–Al–Ni model alloys exposed to oxygen-containing molten lead

Shi

Jianu

Weisenburger

et al. 2019

Journal of Nuclear Materials

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The goal of the study was to determine the critical concentrations of Al, Cr and Ni, at which the quaternary Fe-Cr-Al-Ni model alloys, exposed to oxygen-containing molten Pb up to 600°C, are corrosion resistant, while preserving the austenite structure of the alloy matrix. Twelve alloys were designed to meet the above mentioned requirements; six of them showed corrosion resistance and preserved the austenite phase in the alloy bulk, during the exposure at 550°C and 600°C for 1000 hours to molten Pb containing 10-6 wt.% oxygen. Based on experimental results a general formula was substantiated as follows: Fe-(20-29)Ni-(15.2-16.5)Cr-(2.3-4.3)Al (wt.%). In case of temperatures below 550°C, the critical Cr content was 14.4 wt.%. Two corundum-type crystalline structures were identified as the constituent phases of the passivating scales, one being Cr2O3 and the other Al2O3-Cr2O3 solid solution. The average amount of Cr2O3 in the Al2O3-Cr2O3 solid solution, found in the passivating scales of the Fe-Cr-Al-Ni model alloys, was estimated at ≈ 40 wt.% at 550°C and ≈ 35 wt.% at 600°C. A transitional layer, consisting of Fe-and Ni-enriched austenitic matrix and exhibiting randomly distributed intermetallic B2-(Ni,Fe)Al, was formed below the oxide scale up to a depth of two microns. The austenite, as matrix, and Ni3(Al,Fe) as precipitates are the microstructural phases of the bulk alloys after exposure for 1000h at 600°C to oxygen-containing molten Pb.

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Section: Introductionmentioning

confidence: 99%

Corrosion resistance and microstructural stability of austenitic Fe–Cr–Al–Ni model alloys exposed to oxygen-containing molten lead

Shi

Jianu

Weisenburger

et al. 2019

Journal of Nuclear Materials

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“…This indicates that the interstitial O atoms would segregate to Σ3〈110〉(111), but concentrate in the transition region around Σ5〈001〉(310), indicating the reason of oxidation accumulating at the GB region. 7 This study reveals the microscopic mechanism of the oxidation corrosion of steel applied in industries, and provides parameters for the further study of oxidation corrosion under nuclear energy irradiation environment.…”

Section: Discussionmentioning

confidence: 90%

“…This is consistent with previous experimental observations that the IOZ growth originates in the grain boundaries. 7 …”

Section: Resultsmentioning

confidence: 99%

“… 5,6 One general explanation for oxidation is that oxygen (O) and Fe/alloy atoms diffuse along nano-channels that are mainly formed and grown at grain boundaries of the oxide layer. 7 However, people can neither observe the migration processes of O atoms, nor the nano-channel formation in experiments. Therefore, it is necessary to study the dissolution and diffusion properties of interstitial O around the grain boundaries to explore the initial stage of oxidation formation.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the dissolution and diffusion properties of interstitial oxygen at grain boundaries in body-centered-cubic iron by the first-principles study

Liu

Zhang

et al. 2021

RSC Adv.

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“…LIQUID metals are widely used in casting, welding, hot dip coating, energy storage, and nuclear energy applications. [1][2][3] In addition, these metals represent promising candidates for various applications including batteries, nanomaterial preparation, flexible machinery, biomedical theranostics, and bionics. [4][5][6][7][8][9] However, the equipment parts in contact with the molten liquid metal undergo severe corrosion, resulting in considerable economic losses, thereby limiting the application of liquid metals.…”

Section: Introductionmentioning

confidence: 99%

Effect of Silicon on Corrosion of Directional Fe-B-Si Alloy in Liquid Zinc

Liu

Feng³

et al. 2021

Metall Mater Trans A

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The effect of Si on the corrosion of an Fe-B-Si alloy in liquid zinc was investigated. Corrosion tests of Fe-B-Si were conducted in a pure zinc bath (99.99 wt pct Zn). The results indicated that Si in a-Fe phase had a significant effect on the structure and evolution of corrosion interfaces in a directional Fe-B-Si alloy immersed in liquid zinc. Moreover, Si enrichment of the corroded interface induced changes in the mode of element diffusion, thereby affecting the Fe-Zn reaction and the quantity and volume of Fe-Zn compound. The Fe-Zn compound was occluded with the residual Fe 2 B closest to the corrosion interface, this structure could prevent direct contact between the liquid zinc and the alloy, and firm rooting of the compound at the interface. Therefore, Si in a-Fe phase had a significant effect on the corrosion resistance of Fe-B-Si alloy in liquid zinc. At a Si content of 0.318 wt pct, the densest composite corrosion product layer and highest corrosion resistance were obtained.

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Transmission electron microscopy study of complex oxide scales on DIN 1.4970 steel exposed to liquid Pb-Bi eutectic

Cited by 62 publications

References 31 publications

Corrosion resistance and microstructural stability of austenitic Fe–Cr–Al–Ni model alloys exposed to oxygen-containing molten lead

Corrosion resistance and microstructural stability of austenitic Fe–Cr–Al–Ni model alloys exposed to oxygen-containing molten lead

Investigation of the dissolution and diffusion properties of interstitial oxygen at grain boundaries in body-centered-cubic iron by the first-principles study

Effect of Silicon on Corrosion of Directional Fe-B-Si Alloy in Liquid Zinc

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