FIELD DEPLOYMENT OF WIRELESS SENSOR TO MONITOR COATING DEGRADATION AND ENVIRONMENTAL CORROSIVITY

Impedance-based coating degradation, wetness, and multi-electrode array sensors were deployed in different environments on US Marine Corps bases. The sensors were placed in strategic locations, for instance, on storage buildings and various vehicles to monitor the degradation of corrosion preventive compounds (CPCs), the severity of the environment as a function of exposure time, and the correlation between corrosion damage with environmental variables. The effect of re-application of CPCs was also investigated. The sensors were interrogated using a wireless technology with readers and base stations deployed at US Marine Corps bases throughout US. The sensor data were collected through a network gateway, which permitted to obtain daily information of the present condition of the storage facilities and vehicles. In this paper, the results of a 2-year program are summarized and compared with visual observations and laboratory data.