Early recognition of weathering defects. Evaluation of two newly elaborated methods for detecting coating degradation

Within this work, two newly elaborated methods for detecting coating degradation are presented. The first one utilizes ESR (Electron Spin Resonance) spectroscopy, by which radicals, which are the earliest possible chemical messengers of an initiating photodegradation process, can be detected quantitatively. The second method utilizes EIS (Electrochemical Impedance Spectroscopy) in order to detect changes regarding the water uptake reversibility of the coatings exposed to weathering.