Solution: Soil resistivity measurements
Solution: Soil resistivity measurements
Soil resistivity measurements
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Soil resistivity measurements
Soil resistivity measurements are used both to identify areas at high risk of corrosion and to determine the design parameters of cathodic protection systems, including the number of anodes, the system’s coverage area, and its power requirements.
In practice, the Schlumberger-Wenner measurement method is predominantly used. In this method, four electrodes (usually ground rods) are arranged at equal intervals along a straight line in the ground. An alternating current is fed through the two outer electrodes. Due to the hemispherical propagation of the current beneath the measuring electrodes, a relatively homogeneous field distribution results in the area of the inner electrodes. The potential difference between the electrodes is used to determine the soil resistivity.
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