Investigation on Applicability of ACM Sensors to Evaluation of Corrosivity in Fresh Water and Treated Water

Abstract

In order to study the monitoring of corrosivity of metals in fresh water, atmospheric corrosion monitor （ACM） sensors were immersed in various aqueous solutions to measure their output currents. The results showed that the ACM sensors showed instantaneous responsiveness to water temperature differences and minute amounts of water treatment additives, demonstrating that they can detect and output changes in corrosivity within very short times. The sensors produced different outputs in response to four types of fresh waters. These outputs were found to have high correlation with the amounts of corrosion measured by resistmetric corrosion monitor （RCM） sensors. Thus, it was suggested that ACM sensors may provide a useful means of monitoring corrosivity in fresh water systems.