| Titre : |
Towards a comprehensive understanding of dirt pickup resistance |
| Type de document : |
texte imprimé |
| Auteurs : |
Scott C. Brown, Auteur ; Michael P. Diebold, Auteur ; Daniel C. Kraiter, Auteur ; Carlos Velez, Auteur ; Peter Jernakoff, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 14-27 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Applications extérieures
Encrassement
Essais accélérés (technologie)
Evaluation
Revêtements:Peinture
Surfaces (technologie)
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The fouling of exterior coating surfaces by dirt is no simple matter. The process is complex, dynamic, and varies in length and time. It also includes a range of confounding particle transport, attachment, and release mechanisms. While complex, strategic, multiscale testing and analysis combined with particle and surface science fundamentals can be used to isolate the dominant mechanisms. In this article, fundamental concepts in surface and particle science as they relate to dirt pickup resistance are presented. We demonstrate how these concepts were applied to develop a failure-mode-targeted accelerated test method resulting in good correlations with outdoor exposure data. We further examine the impact of microscale and nanoscale surface features on the fouling mechanism through direct surface interaction measurements and imaging on commercial coating surfaces. A path forward towards development of a comprehensive, yet practical understanding of dirt pickup resistance is proposed. |
| Note de contenu : |
- MECHANISMS OF DIRT PICKUP : Deposition - Adhesions and entrenchment - Particle shedding and release
- EXPERIMENTAL : Materials (dirt simulants - Paint panels - Commercial paints) - Methods (Outdoor exposure testing - Aerosolized carbon black deposition - Grayscale evaluation - Dirt simulant deposition evaluation - Evaluation of precipitation/water-induced surface creep - Particle shedding assessment of films deposited by aerosol |
| En ligne : |
https://drive.google.com/file/d/15csF7rv71WGpV8AR9JT9E02zoHXOmqbd/view?usp=share [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34356 |
in COATINGS TECH > Vol. 17, N° 6 (06/2020) . - p. 14-27
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Towards a comprehensive understanding of dirt pickup resistance in COATINGS TECH, Vol. 17, N° 6 (06/2020)
