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

Presentation held at ETCC 2014, European Technical Coatings Congress, New Functions and Sustainability - Drivers for Future Coatings, 3-5 September 2014, Cologne, Germany
: Wanner, Matthias

Präsentation urn:nbn:de:0011-n-3070117 (1.0 MByte PDF)
MD5 Fingerprint: c8731dd2eef8ac8f9a4529ce6b93264b
Erstellt am: 25.9.2014

2014, 25 Folien
European Technical Coatings Congress (ETCC) <2, 2014, Cologne>
Bundesministerium für Wirtschaft und Technologie BMWi
IGF; N04175/10
Vortrag, Elektronische Publikation
Fraunhofer IPA ()
photodegradation; Fotodegradation; Schutzschicht; Oberflächenschaden; Prüfung; Korrosion; Lack; Fehlererkennung; Schaden

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.