Three dimensional discrete stochastic model of occluded corrosion cell

Cristian Felipe Pérez-Brokate (1) , Dung Di Caprio (2) , Damien Féron (3, 1) , Jacques De Lamare (1) , Annie Chaussé (3)

1 SCCME - Service de la Corrosion et du Comportement des Matériaux dans leur Environnement
2 IRCP - Institut de Recherche de Chimie Paris
3 LAMBE - Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement

We present a stochastic three dimensional (3D) model for corrosion at a mesoscopic scale. The competition between uniform and localized corrosion is studied, with special emphasis given to the connection between the anodic and cathodic reactions. Even if the reactions happen at different places, they are linked and occur simultaneously, maintaining an electric balance. We focused on the particular case of an occluded corrosion on a metal covered by a non reactive layer, where two growth regimes are evidenced and controlled by the diffusion of species in the electrolyte.

Mots clés: Stochastic systems; Electric balance; Modelling studies; Three dimensional (3-D) modeling; Uniform and localized corrosion; Stochastic models; Electrolytes; Localized corrosion; Acid corrosion; C. Passivity; Cathodic reactions; Discrete stochastic models

Domaines: Chimie-Physique [physics.chem-ph]; Sciences du Vivant [q-bio]

Cristian Felipe Pérez-Brokate, Dung Di Caprio, Damien Féron, Jacques De Lamare, Annie Chaussé. Three dimensional discrete stochastic model of occluded corrosion cell. Corrosion Science, 2016, 111, pp.230-241. ⟨10.1016/j.corsci.2016.04.009⟩. ⟨hal-02065243⟩