Morphology of corroded surfaces: Contribution of cellular automaton modelling

► Simple cellular automata model describing uniform and localised corrosion. ► Introduction of a localisation degree which modulate the reactivity in the pit. ► Great variety of corrosion front morphology. ► Comparison with different experimental corrosion processes. ► Stochastic evolution of the pi...

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Bibliographic Details
Published in:Corrosion science 2011, Vol.53 (1), p.418-425
Main Authors: di Caprio, D., Vautrin-Ul, C., Stafiej, J., Saunier, J., Chaussé, A., Féron, D., Badiali, J.P.
Format: Article
Language:English
Subjects:
Applied sciences
B. Modelling studies
C. Crevice corrosion
C. Interfaces
C. Pitting corrosion
Cellular automata
Chemical Sciences
Condensed Matter
Corrosion
Corrosion cell
Corrosion environments
Exact sciences and technology
Localized corrosion
Mathematical models
Metals. Metallurgy
Morphology
or physical chemistry
Physics
Pits
Reaction kinetics
Stochasticity
Theoretical and
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Summary:► Simple cellular automata model describing uniform and localised corrosion. ► Introduction of a localisation degree which modulate the reactivity in the pit. ► Great variety of corrosion front morphology. ► Comparison with different experimental corrosion processes. ► Stochastic evolution of the pit. A simple model describes uniform and localised corrosion. We use a mesoscopic cellular automata (CA) type approach, which has proved a powerful tool in the study of rough metal–electrolyte interfaces. The model accounts for two corrosion kinetics and their relative spatial localisation. The competition between the two forms of kinetics of corrosion is shown to reproduce several types of morphology of corrosion ranging from narrow pits or larger cavities to rough surfaces. Simulation and experimental results are compared providing insight on the relation between kinetics and morphologies of the corrosion front. We emphasize the importance of stochastic simulations in relation to CA.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2010.09.052