Journal
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
Volume 58, Issue 6, Pages 913-932Publisher
JOHN WILEY & SONS LTD
DOI: 10.1002/nme.801
Keywords
boundary element method; cathodic protection; inverse problems; genetic algorithm; coating defects; measurement noise
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Coating defects may occur, for many different reasons, at some points on the surface of a cathodically protected structure. These defects behave anodically and may cause strong localized corrosion. It is possible to identify the position of coating defects by using measured values of the electrochemical potential at some points in the electrolyte or on its surface. To achieve this, an inverse BEM-based genetic algorithm is developed to identify the position of defects in cathodically protected underground pipelines. The formulation is validated through its application to practical problems involving strongly non-linear polarization curves, infinite electrolytes, unknown number of defects and measurement noise. Copyright (C) 2003 John Wiley Sons, Ltd.
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