Study of ion diffusion in oxidation films grown on a model Fe–15%Cr alloy

Sabioni, Antônio Claret Soares; Souza, João Nepomuceno Veiga de; Ji, Vincent; Jomard, François; Trindade, Vicente Braz; Carneiro, Jussara F.

doi:10.1016/j.ssi.2015.03.027

Cited by 22 publications

(10 citation statements)

References 19 publications

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“…Outward effective diffusion of Cr 3+ (oxidized at the steel–oxide interface) in Cr 2 O 3 is faster than inward effective diffusion of O 2− . The Cr 3+ migration process is therefore rate determining for the Cr 2 O 3 formation reaction arising at the solution–oxide interface 37 , 38 . The small arc, which indicates the Cr 3+ migration through the oxide layer, has a frequency of between 1–10 kHz which corresponds to the fact that migration is dependent on the structure of the material 26 .…”

Section: Discussionmentioning

confidence: 99%

Effect of nanograin–boundary networks generation on corrosion of carburized martensitic stainless steel

Boonruang

Thong-on

Kidkhunthod

2018

Sci Rep

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Martensitic stainless steel parts used in carbonaceous atmosphere at high temperature are subject to corrosion which results in a large amount of lost energy and high repair and maintenance costs. This work therefore proposes a model for surface development and corrosion mechanism as a solution to reduce corrosion costs. The morphology, phase, and corrosion behavior of steel are investigated using GIXRD, XANES, and EIS. The results show formation of nanograin–boundary networks in the protective layer of martensitic stainless steel. This Cr2O3–Cr7C3 nanograin mixture on the FeCr2O4 layer causes ion transport which is the main reason for the corrosion reaction during carburizing of the steel. The results reveal the rate determining steps in the corrosion mechanism during carburizing of steel. These steps are the diffusion of uncharged active gases in the stagnant–gas layer over the steel surface followed by the conversion of C into C4− and O into O2− at the gas–oxide interface simultaneously with the migration of Cr3+ from the metal-oxide interface to the gas-oxide interface. It is proposed that previous research on Al2O3 coatings may be the solution to producing effective coatings that overcome the corrosion challenges discussed in this work.

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Section: Discussionmentioning

confidence: 99%

Effect of nanograin–boundary networks generation on corrosion of carburized martensitic stainless steel

Boonruang

Thong-on

Kidkhunthod

2018

Sci Rep

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“…These different cases depend on the space distribution of grain size and on the values of diffusion coefficients in lattice and in short circuits [41,42]. Hence three different regimes involving grain boundary diffusion are classically considered and called A type, B type [2][3][4][5][6][7][8][9][10][11][12][13], and calculated by Atkinson [1] using single crystal or polycrystalline chromia diffusion coefficient from Hagel et al [14]. and C type diffusion.…”

Section: Diffusion Models Taking Into Account Bulk and Short Circuit mentioning

confidence: 99%

“…For each case, the effective diffusion coefficient is calculated by combining Eqs. (3), (4) and (9) or (12). The effective diffusion coeffi cients for each case are plotted in Figs.…”

Section: Input Datamentioning

confidence: 99%

“…These cases correspond to a grain size of about 100 μm or more after 300 h. Oxidation kinetics of cases #P3, #C2 and #C3 are plotted in the same figure. These cases correspond to a grain size of about 1 μm or less after 300 h. Oxidation kinetics have been plotted for a time period of 30 h only, indeed, the shape of the (9) or (12) assuming a parabolic oxide grain growth law for cases #P1 (k g = 10 6 cm 2 s 1 ) and #P2 (k g = 10 10 cm 2 s 1 ) and a cubic oxide grain growth for case #C1 (k h = 10 12 cm 3 s 1 ). (9) or (12) assuming a cubic oxide grain growth for case #C2 (k h = 10 18 cm 3 s 1 ) and a slow parabolic grain growth for case #P3 (k g = 10 14 cm 2 s 1 ).…”

Section: Effect Of K G and K H Values On Oxidation Kineticsmentioning

confidence: 99%

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Modelling of the effect of grain boundary diffusion on the oxidation of Ni-Cr alloys at high temperature

et al. 2018

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ModellJng Oxldatlon ldnetlcs Diffusion Grain boundaries Grain boundaries in oxide scales have a strong effect on oxidation kinetics when they act as diffusion short circuits. This study proposes a quantitative evaluation of the phenomenon by modelling. Various cases of oxide microstructure evolution are treated using both analytical and numerical resolutions. Results showed that the effect of oxide grain growth on the oxidation kinetics can be analysed considering a transitory stage for which the oxidation kinetics is not purely parabolic. Sorne guidelines for choosing the appropriate post-treatment method for the analysis and extrapolation of experimental oxidation kinetics are given.

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“…Measurements of ion transport mechanisms in the oxide film formed on Fe-Cr based alloys are limited, and mainly focused on the ion diffusivities in the oxide scales at high temperatures (above 700°C) [28][29][30][31][32][33]. These data were performed by depositing the isotopic markers ( 54 Cr and 57 Fe) on the oxidized surface of the alloy followed by diffusion annealing.…”

Section: Introductionmentioning

confidence: 99%

Ion transport mechanisms in the passive film formed on 304L stainless steel studied by ToF-SIMS with 18O isotopic tracer

et al. 2020

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The ion transport in the pre-formed passive film on 304L stainless steel surface has been investigated by in situ ToF-SIMS with isotopic tracer. The passive film, formed electrochemically in sulfuric acid, has a bilayer structure with outer iron oxide and inner chromium oxide layers. Further exposure of the passive film to 18 O2 gas (isotopic tracer) at 300°C reveals that outward cation diffusion is the governing ion transport mechanism for the oxide growth. The parabolic rate constant for the oxide growth was determined. The cation diffusion coefficient is found to be markedly higher than the oxygen diffusion coefficient.

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Study of ion diffusion in oxidation films grown on a model Fe–15%Cr alloy

Cited by 22 publications

References 19 publications

Effect of nanograin–boundary networks generation on corrosion of carburized martensitic stainless steel

Effect of nanograin–boundary networks generation on corrosion of carburized martensitic stainless steel

Modelling of the effect of grain boundary diffusion on the oxidation of Ni-Cr alloys at high temperature

Ion transport mechanisms in the passive film formed on 304L stainless steel studied by ToF-SIMS with 18O isotopic tracer

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