As the results of a 14 weeks outdoor exposure of a series of automotive coatings in South Florida, the panels were found to be overgrown with an almost closed layer of mildew. Pinholes remained as permanent surface damage after removing the mildew mycelium. The extent of the damage differed in dependence of the kind of the coating. By tracing the images and profiles of the coating surfaces systematically over all phases of weathering and the subsequent cleaning procedure, a connection between formation of pinholes and mildew growth could be found. Outdoor weathering tests in other regions of Florida as well as in Europe and Australia showed that pinholes caused by mildew attack could also be found in all other locations, but always to a lower extent than in South Florida.The standardised mildew tests EN ISO 846 and MILSTD 810F for laboratory exposure failed to reproduce the formation of pinholes.
Mildew growth on automotive coatings influencing the results of outdoor weathering
Beeinflussung der Ergebnisse der Freiluftbewitterung von Automobilbeschichtungen durch Schimmelpilzwachstum
Materials and Corrosion ; 63 , 2 ; 141-147
2012
7 Seiten, 13 Bilder, 1 Tabelle, 4 Quellen
Article (Journal)
English
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