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Monitoring breakdowns

Photodegradation of mulitlayer automotive coatings tracked in detail
: Entenmann, Marc; Koch, Dennis; Greisiger, Heinz; Schauer, Thadeus

European coatings journal (2013), No.1, pp.32-35
ISSN: 0930-3847
Journal Article
Fraunhofer IPA ()
Mehrlagenschicht; multilayer coatings; Multischicht-Lacksystem; photodegradation; Photooxidation Index (POI); Automobil; Beschichtung; Lack; oxidation

In multilayer automotive coating systems, it is often the e-coat layer which degrades under weathering, leading to coating failure and corrosion. Photo-oxidation index (POI) measurements on multi-coat systems showed that the POI of the e-coat increases during artificial weathering. This degradation process is influenced by both UV and thermocatalytic effects, so dark coatings increase e-coat degradation.