Calculation Of The Protective Current Density
Distribution Of A Cathodic Protection System
With Galvanic Anodes In Terms Of Double-layer
Electrolyte
Author(s)
A. Mujezinović, Ai. Muharemović, I. Turković & Ad. Muharemović
Abstract
This paper considers the effect of discontinuity of electrical conductivity of
electrolytes on the distribution of potential and protective current density in
cathodic protection systems with galvanic anodes. The aim of the paper is to
present a simultaneous analysis for application of both analytical and numerical
models for calculation of the distribution of protective potential and current
density in the cases of homogeneous and double-layer electrolytes. When
considering non-linear boundary conditions at the electrode surface (secondary
distribution of protective current density), the indirect boundary element method
is used, because of the complexity of the calculation. Collocation at the point
method was used for calculation. Due to the nonlinearity of boundary conditions
at the electrode surfaces, the calculation problem is further complicated. In order
to show the importance of this analysis, calculations for the observed system as
well as calculations of errors caused by neglecting the boundary discontinuity of
the soil conductivity are provided. Based on calculations and with respect to
error analyses, the conclusive remark gives the impact valuation of the doublelayer
electrolyte on the correct calculation of the cathodic protection system with
galvanic anodes. This paper also gives the analysis when the double-layered
nature of the electrolyte can practically be ignored, which has great importance
for designers of these systems.
Keywords
cathodic protection (CP), distribution of the protection current density, single-layer electrolyte, double-layer electrolyte
Related Book
Other papers in this volume
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