In this work, laboratory test methodologies that employ the combined environmental stressors of time of wetness and salt loading were used to excite corrosion failure modes of coating systems. Real-time measurements via interdigitated electrodes were correlated with reference panel images to monitor the evolution of coating damage. These data can give insights into the coating degradation process and can be used as parameters for developing a predictive coating condition model. A description of the sensors, electrochemical measurements, and methods for coating testing are reported along with the results of atmospheric tests using a range of conditions to produce coating degradation.

Subject
Corrosion severity, Test methods, Primers, Time of wetness, Coatings, Salts, Substrates, Corrosion rate, Coating damage, Corrosion inhibitors, Corrosion protection, Corrosion coupons, Galvanic corrosion
Keywords:
salt loading, coating degradation, electrochemical measurements, time of wetness, aerospace corrosion
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2022
Association for Materials Protection and Performance (AMPP)
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