Dual Reciprocity Boundary Element Method For
Iron Corrosion In Acidic Solution
Author(s)
A. Peratta
Abstract
This paper presents a hybrid two dimensional Dual Reciprocity Boundary Element
Method (DRBEM) for modelling the primary reactions of iron corrosion in an
acidic solution. The main focus is on the establishment of the DRBEM approach
for this kind of problems in which the mathematical formulation is based on the
Planck-Nerst law, the conservation of charge and the conservation of mass for the
species participating in the process. The model is capable to describe the transport
process of Fe+2 and H+ ions in the aqueous electrolyte driven by the instantaneous
electric field that results from the existent charge distribution. The results of this
work compare qualitatively well with previously established references.
1 Introduction
Numerical modelling of corrosion cells is necessary in order to understand the
basic principles involved in the process. Even the simplest system with primary
chemical reactions can represent a challenging problem from both the theoretical
and numerical points of view. The high complexity of the phenomenon is mainly
due to the non-linear coupling between the transport and electric field equations in
the electrolyte, and more specifically in the region close to the anodic and cathodic
nests. The understanding of the basic principles may lead to novel techniques for
corrosion control, and may help to avoid expensive experimental setups.
The goal of this work is to establish a Dual Reciprocity Boundary Element
Method (DRBEM) for solving iron corrosion problems in which the anodic and
cathodic surfaces are well identified in advance. The conceptual model discussed
in this work is sketched in Fig. 1.
In particular, this paper focuses in the primary reactions occurring in the
anode and cathode, and defers the secondary reactions (i.e. rust formation) for
Keywords
Related Book
Other papers in this volume
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