Signal Acquisition and Validation for Electrochemical Noise Corrosion Monitoring System

Due to its high sensitivity, the electrochemical noise measurement can be used as a kind of corrosion monitoring, since it allows exact on-line information about the corrosion system. A good correlation between visual corrosion findings and long-term corrosion monitoring by current and potential responses of two identical electrodes is observed. Electrochemical noise signal measurement involves the use of a passive system, which has the advantage of simple setup, without any signal injection or external stimulus, but with a very sensitive signal, in which sources of error or excessive signal variance must be avoided. A corrosion monitor system requires reproducible data for good inferences, or classifiers. In this work, data from some measurements of electrochemical noise of well-known corrosion tests are examined and validated according to the literature. The measurement results demonstrated good reproducibility and a match with the reference. This data acquisition is a first and important step to implement a corrosion monitoring system.