Impact Of The Soil Resistivity On IR Drop When
Applying A Cathodic Protection System With
Galvanic Anodes On PCCP
Author(s)
A. Mujezinović & A. Muharemović
Abstract
This paper analyzes the phenomenon of potentials deviation (ON/OFF
potentials) as a result of changes in the soil resistivity, when applying cathodic
protection systems with galvanic anodes on PCCP (pre-stressed concrete
cylinder pipes) in ambient desert conditions. Measurement of ON and OFF
potentials on a long section with different values of the soil resistivity have
shown that there are great deviations in parts of sections which are proportional
to the measured values of the soil resistivity. Analyzing the changes in a value of
IR drop show that the ON potential changes very little in the case of high values
of the soil resistivity, as well as that on these sections, a high value of IR drop
appear, i.e. great change OFF potential. Over time, this difference between the
ON and OFF potentials in these sections decreases and this is a case of a full
polarization of PCCPs. If the value of the electrical soil resistivity is relatively
low, it can be concluded that the IR drop is negligible.
Keywords: cathodic protection (CP), protection current, measurements, desert
conditions, ON/OFF potentials, pre-stressed concreted cylinder pipe (PCCP).
Keywords
cathodic protection (CP), protection current, measurements, desert
conditions, ON/OFF potentials, pre-stressed concreted cylinder pipe (PCCP).
Related Book
Other papers in this volume
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