Three dimensional discrete stochastic model of occluded corrosion cell

Pérez-Brokate, Cristian Felipe; Caprio, Dung Di; Féron, Damien; Lamare, Jacques de; Chaussé, A.

doi:10.1016/j.corsci.2016.04.009

Cited by 36 publications

(61 citation statements)

References 33 publications

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“…Such a mechanism can operate only if anodic and cathodic reactions are (at least partially) spatially separated. Finally, the sharp limit between areas of limited and extended corrosion, shape of the depression profiles near these limits and he steep slopes of the depression edges [76] are additional evidence for spatial separation of anodic and cathodic sites.…”

Section: Tablementioning

confidence: 94%

Corrosion at the carbon steel-clay borehole water interface under anoxic alkaline and fluctuating temperature conditions

Schlegel

Necib²,

Daumas³

et al. 2018

Corrosion Science

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Coupons of carbon steel were corroded in situ in anoxic clay porewater under slightly alkaline conditions. Sample damage was less than 1 μm for 9 months at 85°C only, and corrosion interfaces were covered by a thin, protective layer of Fe-silicate. The damage was more significant for samples exposed to room temperature transients (up to 38 μm for two years), and the long-term surface differentiated in cathodic (Fe-silicate covered) areas and anodic crevices filled with siderite, chukanovite, β-Fe 2 (OH) 3 Cl, and covered by tubercles. Sulfide compounds were detected, and were related to the metabolism of sulfate-reducing prokaryotes detected by microbiological techniques.

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Section: Tablementioning

confidence: 94%

Corrosion at the carbon steel-clay borehole water interface under anoxic alkaline and fluctuating temperature conditions

Schlegel

Necib²,

Daumas³

et al. 2018

Corrosion Science

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“…Cellular automaton models (CA) based on discretized descrip tion of time, space and states, have been applied successfully for modelling pitting corrosion and passivation/depassivation events [19][20][21][22][23][24][25][26][27][28][29][30][31]. The present study is an extension in 3D of a previous 2D numerical mode!…”

Section: Introductionmentioning

confidence: 97%

3D cellular automata simulations of intra and intergranular corrosion

et al. 2016

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A simple mode! for the effect of intergranular corrosion on overall corrosion processes is investigated using a cellular automata approach. The corroding polycrystalline material consists of domains and their boundaries. The domains represent the monocrystalline cores while their boundaries represent the inter granular defects. Either, a periodic pattern or randomly generated domains of Voronoï tessellation are used to represent the polycrystalline structure. The parameters of the mode!, taking into account the polycrystalline aspect of corrosion, are the domain density and the corrosion probabilities of metal grain core and grain boundary sites. The corrosion probability for grain boundary is set to a value higher than it is for the grain core. A complex surface structure appears with a high geometrical roughness when defects are not too dense. A strong correlation is established between the roughness evolution, the metal crystalline properties and the corrosion mechanism ofmetal dissolution. This work concerns simulations in 3D and extends the previous work limited to 2D simulations.

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“…The typical dimension of the lattice site will be a = 10 µm, for which we obtain the simulation time step ∆t diff = 9.48 × 10 −3 s. This value takes into account a factor 2 due to the fact that in the algorithm, the swapping procedure is taken for both configurations of position indices. A more detailed description of the algorithm has been given as in [41,42]. There is a main corrosion loop with an inner diffusion, which is executed N diff times.…”

Section: )mentioning

confidence: 99%

“…This case is the three dimensional extension of a case previously studied in two dimensions by Jean-Pierre Badiali and coworkers [39,44,45] and has been investigated in [41]. The starting point for the system is represented in the schematic CA representation given in figure 2 (c).…”

Section: Occluded Corrosionmentioning

confidence: 99%

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Contribution of cellular automata to the understanding of corrosion phenomena

Zenkri¹,

Caprio²,

Pérez-Brokate³

et al. 2017

Condens. Matter Phys.

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We present a stochastic CA modelling approach of corrosion based on spatially separated electrochemical halfreactions, diffusion, acido-basic neutralization in solution and passive properties of the oxide layers. Starting from different initial conditions, a single framework allows one to describe generalised corrosion, localised corrosion, reactive and passive surfaces, including occluded corrosion phenomena as well. Spontaneous spatial separation of anodic and cathodic zones is associated with bare metal and passivated metal on the surface. This separation is also related to local acidification of the solution. This spontaneous change is associated with a much faster corrosion rate. Material morphology is closely related to corrosion kinetics, which can be used for technological applications.

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Three dimensional discrete stochastic model of occluded corrosion cell

Cited by 36 publications

References 33 publications

Corrosion at the carbon steel-clay borehole water interface under anoxic alkaline and fluctuating temperature conditions

Corrosion at the carbon steel-clay borehole water interface under anoxic alkaline and fluctuating temperature conditions

3D cellular automata simulations of intra and intergranular corrosion

Contribution of cellular automata to the understanding of corrosion phenomena

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