Journal
PROGRESS IN ORGANIC COATINGS
Volume 71, Issue 4, Pages 362-368Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2011.04.006
Keywords
Nano zinc oxide; UV stabilizer; Polyurethane; Electrocoating
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Nano zinc oxide (ZnO) was co-deposited together with a cathodic electrodeposition paint onto phosphated normal steel panels. The films containing nano zinc oxide were compared with blank films regarding their stability against UV radiation. SEM micrographs show that nano-ZnO can stop the formation of cracks in the film. On the other hand, AFM, surface roughness and loss of gloss studies showed that the presence of nano zinc oxide particles reduces the photo-degradation of the aromatic polyurethane binder. It was also found that the presence of the nano-sized ZnO particles in the films reduces the tendency of the films to yellowing. (C) 2011 Elsevier B.V. All rights reserved.
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