Sensor to Detect Moisture Intrusion and Degradation of Coatings, Composites,
and Adhesive Bonds
An in-situ sensor, based on electrochemical impedance spectroscopy (EIS),
has been developed that can detect the absorption of moisture in polymeric
systems. In the case of a coated metal, moisture intrusion into the coating
foretells corrosion of the substrate so that the sensor is sensitive to the very
early stages of corrosion. In an adhesive bond, the sensor monitors ingress of
moisture into the bondline that causes plasticization of the adhesive and
hydration of an aluminum adherend ... and much more!!
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