Computer models have for some years been used to predict the performance of impressed current cathodic protection (ICCP) systems on ships and boats. The objective being to achieve optimum protection of the vessel from corrosion and to predict the associated fields/signatures.

However, in many cases these models have been based on simple dipole approximations. In this paper a new system is described which integrates the electric and magnetic models to provide a tool capable of accurately Predicting the impact of any change in the ICCP system, surface conditions or environmental conditions on the electric and magnetic signatures.

The model is based on the boundary element method which enables the exact geometry of the vessel to be described including anodes, reference electrodes, surface conditions and polarisation properties. The paper not only describes the theoretical background of the model but also it's application to optimise the ICCP system and it's related electric and magnetic fields.

See also: Boundary element modeling,Corrosion models, Knowledge based models, Mechanistic models, Pitting fatigue models, Risk based models

Predicting corrosion related electrical and magnetic fields using BEM, Robert Adey and John Baynham, BEASY