Volume 3, Issue 2 (February 2006)
Use of Electrochemical Techniques to Assess Performance of Corrosion Protection Systems for Reinforced Concrete Structures—A Review
Electrochemical methods for controlling corrosion of reinforcing steel in concrete involve techniques that interfere with the electrochemical reactions occurring on the embedded steel surface. Included in this category are cathodic protection, electrochemical chloride extraction, re-alkalization (for carbonation damage), and corrosion inhibitors. Assessing and monitoring the performance of these corrosion protection systems for steel in concrete can sometimes be challenging. Several techniques and devices are available. In recent years different electrochemical techniques have been utilized. The present paper discusses the use of the older devices and the more recently developed devices such as the “ladder” probe and the microprocessor controlled electrical resistance probe for evaluating and monitoring the performance of reinforced concrete corrosion protection systems. Remote monitoring options are also discussed.