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A mechanistic study of degradation of a typical automotive clearcoat caused by bird droppings / Hossein Yari in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 1 (01/2011)
[article]
Titre : A mechanistic study of degradation of a typical automotive clearcoat caused by bird droppings Type de document : texte imprimé Auteurs : Hossein Yari, Auteur ; Mohsen Mohseni, Auteur ; Bahram Ramezanzadeh, Auteur Année de publication : 2011 Article en page(s) : p. 83-95 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Vernis
Déjections d'oiseaux
Hydrolyse
Pancréatine
Revêtements -- Détérioration
Vernis -- DétériorationIndex. décimale : 667.9 Revêtements et enduits Résumé : This study aims at investigating the degradation mechanism of an automotive clearcoat caused by bird droppings. Natural bird droppings and their synthetic equivalent (pancreatin) were utilized for this purpose. The presence of highly-etched areas on the surface of coatings and structural variations of clearcoat after being attacked by these materials corresponded to a catalyzed hydrolytic degradation. This finding was obtained using different analytical techniques. Based on these studies, three possible hypotheses were presented, including acid catalysis, metal ion catalysis, and enzymatic catalysis. The conditions required for the occurrence of each hypothesis were discussed. It was found that acid and metal ions have a weak contribution to catalyze the hydrolysis reaction of clearcoat, whereas enzymes existing in bird droppings were mainly responsible for this hydrolytic degradation. DOI : 10.1007/s11998-010-9273-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9273-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10926
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