REAL-TIME MONITORING OF CORROSION IN SOIL UTILIZING COUPLED MULTIELECTRODE ARRAY SENSORS

摘要

Real-time corrosion monitoring for carbon steel materials in soil was conducted utilizing coupled multielectrode sensors. It was demonstrated that the coupled multielectrode sensor is an effective realtime tool for monitoring the corrosion rate in soil. The steady state corrosion rate measured in watersaturated soil was found to be approximately 2 to15 μm/year. However, the corrosion rate in a space filled with water was several orders of magnitude higher than those found in the densely packed soil saturated with water. The coupled multielectrode sensor also provided real-time indications for the effectiveness of cathodic protection in soil.