Theoretical Analysis of Anomalies in High-Temperature Oxidation of Fe–Cr, Fe–Ni, and Fe–Ni–Cr Alloys

Khokhlov, V. V.; Ракоч, А. Г.; Dement'eva, E. S.; Lyzlov, O. A.

doi:10.1023/b:prom.0000013114.40128.50

Cited by 8 publications

(7 citation statements)

References 2 publications

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“…The relative intensities of the Ni-2p, Cr-2p and Fe-2p peaks in the XPS survey spectra obtained at different pHs and radiation environments are shown in Fig. 5 [4][5][6][7][8]32,33,[48][49][50][51][52][53][54][55]. At pH 10.6 the enrichment ratio for Cr is lower and that for Fe is higher in the presence of radiation compared to those in the absence of radiation.…”

Section: Xps Resultsmentioning

confidence: 92%

Combined effect of gamma-radiation and pH on corrosion of Ni–Cr–Fe alloy inconel 600

Musa

Wren

2016

Corrosion Science

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Section: Xps Resultsmentioning

confidence: 92%

Combined effect of gamma-radiation and pH on corrosion of Ni–Cr–Fe alloy inconel 600

Musa

Wren

2016

Corrosion Science

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“…It should be noted that after the high-temperature (T > 1300 K and P O2 ≥ 10 4 Pa) treatment of Zr in an oxygen-containing gaseous atmosphere, the p-n junction exists in the forming oxide layer [ 76 ]. The original version of these results can be seen in supplement material .…”

Section: Formation Oxide-ceramic Surface Layers On Zrmentioning

confidence: 99%

“…This connection of an external supply source of current leads to the breaking of the p-n junction. Asymmetry of electric conductivity during direct and reverse passing of the current through “Zr-oxide layer” system does not occur if a coating grown under the oxygen partial pressure in a gaseous atmosphere consists of only ZrO 2 –δ (n-conducting layer) [ 76 ].…”

Section: Formation Oxide-ceramic Surface Layers On Zrmentioning

confidence: 99%

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Plasma Electrolytic Modification of Zirconium and Its Alloys: Brief Review

et al. 2023

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The review focuses on the surface modification of Zr and its alloys, which is necessary to expand the applications of these kinds of materials. Data on the properties of pure zirconium and its alloys are presented. Since surface engineering and the operation of the above materials are in most cases associated with the formation of oxide coatings, information on the characteristics of ZrO2 is given. In addition, attention is paid to phasing in the zirconium–oxygen system. It is noted that the most effective method of surface engineering of Zr and its alloys is plasma electrolytic modification (PEM) technology. Specific examples and modes of modification are described, and the reached results are analyzed. The relevance, novelty and originality of the review are determined by the insufficient knowledge about a number of practical features concerning the formation of functional oxide coatings on Zr and some of its alloys by the technology of PEM. In particular, the information on the phase composition and possibilities of stabilization of the tetragonal and cubic modifications of ZrO2, the effects of the component composition of electrolyte solutions and electrolyte suspensions, and the specifics of the treatment of additive shaping and deformed materials are rather contradictory. This review aims to collect recent advances and provide insights into the trends in the modification of Zr and its alloys, promote the formulation of practical recommendations and assess the development prospects.

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“…A small, yet distinct peak was observed at a 2θ equal to 52°, which agreed well with the reference peak for the Cr-rich α-ferrite phase. The relatively high Cr content in the precipitate free Cr-depleted zone is considered important as the content above the reported critical content of ~20 wt.% necessary to maintain a protective external Cr 2 O 3 -based scale of austenitic Fe-Cr-Ni alloys 25,26. Based on these findings, it was concluded that the oriented discontinuous Cr-rich precipitates were comprised of the Cr-rich α-ferrite phase.DISCUSSIONThe small weight gain (2.24±1.22 mg/dm 2 ) and the associated formation of a thin (205±14 nm) dense, external single-layer Cr 2 O 3 -based scale after 500 h exposure suggest that Alloy 33 has a promising corrosion resistance: albeit under the specific SCW conditions tested.…”

mentioning

confidence: 99%

Technical Note: Corrosion Resistance of Alloy 33 (Fe-33Cr-32Ni) in Supercritical Water

Mahboubi¹,

Botton²,

Kish³

2015

CORROSION

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This study examines the corrosion resistance of wrought Alloy 33 (Fe-33Cr-32Ni) exposed in a static autoclave containing 25 MPa supercritical water (SCW) at 625 °C for 500 h. Gravimetric measurements in combination with electron microscopy analyses showed that the formation of a thin, dense external single-layer Cr 2 O 3 -based scale provides Alloy 33 with a promising corrosion resistance. However, the microstructure was not stable as Cr-rich α-ferrite precipitates formed in the sub-surface during the short exposure. The suitability of this alloy as a candidate fuel cladding for the Generation IV supercritical water-cooled nuclear reactors concept is discussed in light of the findings presented.

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Theoretical Analysis of Anomalies in High-Temperature Oxidation of Fe–Cr, Fe–Ni, and Fe–Ni–Cr Alloys

Cited by 8 publications

References 2 publications

Combined effect of gamma-radiation and pH on corrosion of Ni–Cr–Fe alloy inconel 600

Combined effect of gamma-radiation and pH on corrosion of Ni–Cr–Fe alloy inconel 600

Plasma Electrolytic Modification of Zirconium and Its Alloys: Brief Review

Technical Note: Corrosion Resistance of Alloy 33 (Fe-33Cr-32Ni) in Supercritical Water

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