Corrosion Monitoring of Aluminum by Electrochemical Impedance Method

Abstract

To monitor the corrosion behavior of Aluminum in wet and dry cyclic condition, ICM sensor consisting of two spiral-shaped electrodes was developed. The impedance of Aluminum was measured while repeating drying and wetting with NaCl which is deposited to the ICM sensor. The integrated value of the reciprocal of 1 Hz impedance obtained from the ICM sensor had a good correlation with the amount of corrosion obtained from the RCM sensor. A simulated test in which mud and snow-melting agents were mixed showed uniform wettability and sustained corrosion.