A sensor system designed for remote coating degradation detection

A remote sensing technique based on Electrochemical Impedance Spectroscopy (EIS) for detecting coating degradation is presented in this paper. Different from the traditional EIS which requires bulky and expensive instruments, the sensor system designed by our group realizes low cost, remote detection for coating degradation. The sensor system consists of sensor nodes and a base station. The sensor node is less than a business card in size. Two coated panels are used for testing. Testing results are presented for both commercial EIS instrument and the sensor system. Good correlations indicate this sensor system is valid for EIS based coating degradation detection.