Evaluation of Corrosion Inhibitors in Cooling Water Systems Using a Coupled Multielectrode Array Sensor

Abstract

Abstract A multielectrode localized corrosion sensor has been developed for evaluating the performance of corrosion inhibitors for carbon steel in cooling water. Experimental results indicate that the coupled multielectrode sensor provided instantaneous measurement of corrosion currents and a rapid real-time response to the addition of inhibitors. Evaluation of several inhibitors showed that the sensor was able to distinguish between inhibitor type and concentration. It was also demonstrated that the sensor has a detection limit of 5×10−11 A with respect to current measurement. The capabilities of the sensor may be suitable for online monitoring of corrosion in a variety of applications where real-time monitoring is required.