| Titre : |
An improved accelerated weathering protocol to anticipate Florida exposure behavior of coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Mark Nichols, Auteur ; John Boisseau, Auteur ; Lynn Pattison, Auteur ; Don Campbell, Auteur ; Jeff Quill, Auteur ; Jacob Zhang, Auteur ; Don Smith, Auteur ; Karen Henderson, Auteur ; Jill Seebergh, Auteur ; Douglas Berry, Auteur ; Tony Misovski, Auteur ; Cindy Peters, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 153-173 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Automobiles -- Revêtements:Automobiles -- Peinture
Avions -- Revêtements:Avions -- Peinture
Durée de vie (Ingénierie)
Essais accélérés (technologie)
Revêtements -- Détérioration
Vieillissement
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A new accelerated weathering protocol has been developed which closely replicates the performance of automotive and aerospace coating systems exposed in South Florida. IR spectroscopy was used to verify that the chemical composition changes that occurred during accelerated weathering in devices with a glass filter that produced a high fidelity reproduction of sunlight’s UV spectrum matched those that occurred during natural weathering. Gravimetric water absorption measurements were used to tune the volume of water absorption during accelerated weathering to match that which occurred during natural weathering in South Florida. The frequency of water exposure was then scaled to the appropriate UV dose. A variety of coating systems were used to verify the correlation between the physical failures observed in the accelerated weathering protocol and natural weathering in South Florida. The new accelerated weathering protocol correctly reproduced gloss loss, delamination, cracking, blistering, and good performance in a variety of diverse coating systems. For automotive basecoat/clearcoat paint systems, the new weathering protocol shows significant acceleration over both Florida and previous accelerated weathering tests. For monocoat aerospace systems, the new weathering protocol showed less acceleration than for automotive coatings, but was still an improvement over previous accelerated tests and was faster than Florida exposure. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Natural weathering - Accelerated weathering - PAS-FTIR spectroscopy - Ultraviolet - Gloss and color change - Visual evaluation - Water sorption
- RESULTS : Water absorption - Photochemistry - Physical failures of paint systems - Aerospace coatings
- DISCUSSION : Water absorption - Spectral match to sunlight - Cyclic conditions - Acceleration of new tet protocol - Positive controls - UVA longevity - Aerospace coatings |
| DOI : |
10.1007/s11998-012-9467-x |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9467-x.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18235 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 2 (03/2013) . - p. 153-173
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