Contribution of cellular automata to the understanding of corrosion phenomena

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 \nfrom different initial conditions, a single framework allows one to describe generalised corrosion, localised \ncorrosion, reactive and passive surfaces, including occluded corrosion phenomena as well. Spontaneous spatial \nseparation of anodic and cathodic zones is associated with bare metal and passivated metal on the surface. \nThis separation is also related to local acidification of the solution. This spontaneous change is associated with \na much faster corrosion rate. Material morphology is closely related to corrosion kinetics, which can be used \nfor technological applications.