[article]
| Titre : |
Acid etch resistance of automotive clearcoats. I : Laboratory test method development |
| Type de document : |
texte imprimé |
| Auteurs : |
Joseph W. Holubka, Auteur ; Li - Feng Xu, Auteur ; P. J. Schmitz, Auteur |
| Année de publication : |
2000 |
| Article en page(s) : |
p. 77-82 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Tags : |
Matériau revêtement Vernis Industrie automobile Propriété chimique Feuil Résistance acide Essai laboratoire Gravimétrie |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
This paper reports on the development of a laboratory test procedure for the evaluation of the environmental etch resistance of clearcoats. The test evaluates the bulk acid hydrolysis resistance of clearcoats by gravimetrically following material weight loss as a function of exposure time to a sulfuric acid solution, under conditions that simulate outdoor exposure. The bulk hydrolysis resistance of five production clearcoat technologies including acrylic melamine, acrylic melamine-silane, carbamate, acrylic urethane, and epoxy acid were evaluated. Results from the weight loss measurements were consistent with those anticipated based on the coating systems bulk chemistry and inherent hydrolysis resistance, for clearcoat systems processed under nominal processing conditions. The relative rankings from the laboratory test were found to correlate with field etch ratings. The test method is inexpensive, quantitative, and generates repeatable results that are not subject to environmental variations associated with current field etch testing. |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5826 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 72, N° 901 (02/2000) . - p. 77-82
[article]
|
Aller sur edunet
Accueil
Acid etch resistance of automotive clearcoats. I : Laboratory test method development in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 901 (02/2000)
