Determination of Underground Corrosion Rates from Polarization Resistance Measurements

An improved technique for measuring polarization resistance, involving the use of two different frequencies of complete reverse square wave polarizing current, was applied to 40 varieties of soil corrosion systems. Results of polarization resistance monitoring over a 308 day period were directly correlated to the weight loss measurements which were taken using indentical probes. This experimentally verified the applicability of the technique to underground corrosion monitoring.