[article]
| Titre : |
Correlation of accelerated exposure testing and exterior exposure sites |
| Type de document : |
texte imprimé |
| Auteurs : |
Jeff Andrews, Auteur ; Freidun Anwari, Auteur ; Ben J. Carlozzo, Auteur ; Mark DiLorenzo, Auteur ; Roy Glover, Auteur ; Steven Grossman, Auteur ; Carl J. Knauss, Auteur ; Joseph McCarthy, Auteur ; Brian Mysza, Auteur ; Rene Patterson, Auteur ; Russell Raymond, Auteur ; Brian Skerry, Auteur ; Phillip M. Slifko, Auteur ; Walter Stipkovich, Auteur ; John C. Weaver, Auteur ; Michael Wolfe, Auteur |
| Année de publication : |
1994 |
| Article en page(s) : |
p. 49-67 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Essais accélérés (technologie)
Essais de brouillard salin
Revêtements -- Effets du climat
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The Cleveland Society Technical Committee has undertaken a long-term study which will provide some guidance and basic information for researchers working in the areas of accelerated testing and exterior exposure analysis. The ultimate goal will be the correlation of accelerated test methods to several geographically different exposure sites. The Technical Committee began the study by choosing nine different coatings systems which offer a wide variety of performance characteristics. These systems included a high-solids epoxy, a high-solids urethane, several types of waterborne systems (waterborne epoxy, epoxy ester, acrylic, direct-to-metal (DTM) acrylic, water reducible alkyd, and styrenated acrylic), and a Type TT-E-266 specification alkyd. All systems were commercially available and, except for the specification alkyd, are considered "compliant coatings".
These sytems were placed on exterior exposure at nine different sites across the United States. Four are commonly referred to as heavy marine exposure sites and include Ocean City, NJ; Kure Beach, NC; Daytona Beach, FL; and San Francisco, CA (the Golden Gate Bridge). Three more can be considered moderate to heavy industrial exposure sites and include Cleveland, OH; North Kansas City, MO; and Miami, FL. Another site, the Los Angeles Basin area, is known for heavy smog, and the last site, Portland, OR, was chosen for high humidity and rainfall. The first six month's exposure results and early correlations within these sites will be discussed, but longer exposure times will be required before many conclusions can be drawn.
These same nine systems were also tested by use of six accelerated methods according to the protocol established by an ASTM Committee (D01.27.31) on accelerated corrosion testing. The methods include salt fog, cyclic salt fog, Prohesion Cabinet, Cyclic Prohesion/QUV, and cyclic immersion/weathering (KTA-Envirotest). These methods are either in use today or have been proposed as more realistic replacements to those in current use. Results of these accelerated tests will be discussed and an attempt made to correlate the results among these accelerated methods. In addition, positron annihilation lifetime spectroscopy (PALS) will be run at the end of the exposure period on the Daytona Beach panels.
Future work will focus on direct correlation of the long-term exposure results to the different accelerated methods. |
| Note de contenu : |
- EXPERIMENTAL : Test paints
- PROCEDURE : Panel preparation - Exterior exposures - Accelerated testing - Accelerated tests - The UV light source
- RESULTS : Statistics - Exterior exposure weathering - Accelerated weathering
- DISCUSSION : Exterior exposures - Accelerated testing |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18721 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 66, N° 837 (10/1994) . - p. 49-67
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