Titre : |
Making scratch resistance visible |
Type de document : |
texte imprimé |
Auteurs : |
B. Pourdeyhimi, Auteur ; Xuegin Wang, Auteur ; Fred Lee, Auteur |
Année de publication : |
1999 |
Article en page(s) : |
p. 100-106 |
Note générale : |
Bibliogr. |
Langues : |
Anglais (eng) |
Index. décimale : |
667.9 Revêtements et enduits |
Résumé : |
Scratches and other mechanical damages of the coatings surface lead to changes in appearance like reduction in gloss and reflectivity. Yet no techniques for accurate characterization of these changes are yet available. The optical imaging technique described below for examining surface defects provides a main advantage : it is completely insensitive to the basecoat and its properties will not in any form influence the reflectivity of the topcoat. |
Note de contenu : |
- Superior to human perception
- To eliminate influence by the basecoat
- A three-dimensional optical arrangement
- Defective areas cause scattering
- Experimental conditions
- A modified mar test is developed
- Dry abrasion test
- Two series of experiments to examine the extent of damage
- Image analysis methods
- Different opinions to the reflectance of apperance change
- Standard errors of statistics are not relevant
- Texture roughness can be characterized using power spectral density
- Some mathematic details to PSD
- Greatest loss of reflectivity by polyurethane samples
- Fibers in the pad material caused curied path at low loads
- A perfect correlation between the gloss measurement and reflectivity
- Texture roughness is a robust measure of appearance at early stages of wear |
En ligne : |
https://drive.google.com/file/d/1m6XikT29zaJUEfsc64MAIeaPlsXTMFi9/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11178 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4/99 (04/1999) . - p. 100-106