Titre : |
Prediction of paint chalking rates from early exposure data |
Type de document : |
texte imprimé |
Auteurs : |
Michael P. Diebold, Auteur |
Année de publication : |
2023 |
Article en page(s) : |
p. 1179-1191 |
Note générale : |
Bibliogr. |
Langues : |
Américain (ame) |
Catégories : |
Dioxyde de titane Durée de vie (Ingénierie) Essais accélérés (technologie) Farinage (défauts) Modèles mathématiques Revêtements -- Défauts:Peinture -- Défauts Revêtements -- Détérioration:Peinture -- Détérioration Revêtements -- Effets du rayonnement ultraviolet:Peinture -- Effets du rayonnement ultraviolet
|
Index. décimale : |
667.9 Revêtements et enduits |
Résumé : |
Color fade (chalking) data for roughly 1200 paints made with different grades of TiO2 pigment that were exposed in Florida were compiled and analyzed a number of ways. Chalk/fade (C/F) values were calculated for each sample after 6, 7, 8, 9, 12, 15 and 18 months and compared to their final (21 month) C/F values. There is generally excellent agreement between 6- and 9-month C/F results and final C/F values, and this technique can be used with a high level of confidence to rapidly predict C/F durability values. In some instances, early C/F values are better measures of TiO2 pigment photocatalytic activity than the later C/F values. In addition, we examined the effect of starting month on degradation rate and found that after one year, series started in early summer degraded to a greater extent than those started in late autumn, despite the fact that all samples were exposed to the same nominal amount of ultraviolet light. Finally, location of a panel within each exposure series had a small but statistically significant effect on C/F values. |
Note de contenu : |
- Objective and method
- Data collection
- Data analysis
- Mathematical modeling : General - Proof of concept - Sources of error
- Other results of interest
- Effect of position in series on chalking
- Effect of starting month on chalking
- Table 1 : Percent of samples with three or more red reflectance values greater than 100 after a set number of months exposed
- Table 2 : Percent of samples having early C/F values within a given range about the final C/F value
- Table 3 : Average difference (measured in C/F units) between early and final C/F values, as a function of exposure time
- Table 4 : Differences between early and final C/F value, classified according to the number of data points used to calculate X22
- Table 5 : Comparison of actual and calculated times to 220 red reflectance for samples with 9-month errors in excess of + 10 C/F units |
DOI : |
https://doi.org/10.1007/s11998-023-00727-6 |
En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-023-00727-6.pdf?pdf=button% [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39709 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 4 (07/2023) . - p. 1179-1191