Numerical Simulation Of Metal Corrosion
With Cluster Formation
Author(s)
A. Taleb1, J. Stafiej & J. P. Badiali
Abstract
Using a cellular automaton model we describe the corrosion of a piece of metal
in contact with an aggressive medium. The metal considered contains some
defects that are distributed on some lines crossing the overall metal. Corrosion is
considered in a particular environment where no oxide film is formed on the
metal surface and where the diffusion is not a determining process. The main
parameters of the model are the number of line-defects and the corrosion
probability of the metal surface site. This probability is larger when a site is
located on a line-defect than otherwise. Varying the model parameters we
investigate the roughness of the metal surface and the formation of clusters that
are detached from the corrosion front. We show that a complicated surface
structure may appear with a high roughness if the density of defects is not too
high. A relation between the cluster concentration and the surface roughness is
established.
Keywords: numerical simulation, cellular automaton model, metal corrosion,
crystalline defects, clusters formation.
1 Introduction
For many metal/ environment interfaces systems there is a clear evidence that
corrosion is associated with defects, inclusions, phase boundaries, etc )Evans [1]
Janik-Czachor [2,3], Richardson and Wood [4], Sedriks [5]). In some cases it
was observed that the effective dissolution rate is larger than the one expected
for pure electrochemical processes suggesting that another dissolution process
parallel to the electrochemical ones occurs simultaneously (Marsh and Schaschal
Keywords
numerical simulation, cellular automaton model, metal corrosion,crystalline defects, clusters formation.
Related Book
Other papers in this volume
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