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Applying coatings outside of the recommended thickness range / Chrissy Stewart in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 31, N° 2 (02/2014)
[article]
Titre : Applying coatings outside of the recommended thickness range Type de document : texte imprimé Auteurs : Chrissy Stewart, Auteur ; Richard A. Burgess, Auteur Année de publication : 2014 Article en page(s) : p. 15-23 Langues : Américain (ame) Catégories : Analyse des défaillances (fiabilité)
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Epaisseur -- Défauts
Revêtements -- Défauts:Peinture -- DéfautsIndex. décimale : 667.9 Revêtements et enduits Résumé : The manufacturer's Product Data Sheet (PDS) should always be consulted when recommending a coating or coating system for a specification or when coatings will be applied. The PDS typically contains information regarding appropriate uses and environments, performance characteristics, and application information, including mixing, application methods and equipment, and the recommended thickness range for the mate-rial. The information provided by the manufacturer should be followed closely to maximize performance of the coating material.
Coating materials are selected for application with a target application thickness in mind. The manufacturer's recommended range and the thickness indicated in the project specification should be in agreement. If a discrepancy exists, the specifier and the coating manufacturer should be contacted. When applied at the appropriate thickness, the physical and protective properties of the coating material are optimized. Often, a problem with coating performance can occur if not enough attention is given to the thickness at which the materials are to be applied.
This article will investigate the possible failure mechanisms that can occur if a coating is applied at insufficient or excessive thickness.Note de contenu : - INSUFFICIENT COATING THICKNESS
- CONSEQUENCES OF INSUFFICIENT COATING THICKNESS : Visibility of substrate - Pinpoint - Cracked, brittle coating
- CONSEQUENCES OF EXCESSIVE COATING THICKNESS : Sagging and running - Cracking and delamination - Wrinling - Increased dry time
- METHODS OF COATING THICKNESS MEASUREMENT : Took gage - Nondestructive coating thickness gage - Microscope equipped with scalePermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21658
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 31, N° 2 (02/2014) . - p. 15-23[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16091 - Périodique Bibliothèque principale Documentaires Disponible Nondestructive analysis of uneven paint coatings by dynamic heat conduction following flash heating / Minoru Aoyagi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 3 (05/2014)
[article]
Titre : Nondestructive analysis of uneven paint coatings by dynamic heat conduction following flash heating Type de document : texte imprimé Auteurs : Minoru Aoyagi, Auteur ; Takefumi Hiraguri, Auteur ; Takahiro Ueno, Auteur Année de publication : 2014 Article en page(s) : p. 311-318 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Contrôle non destructif
Epaisseur -- Défauts
Revêtements -- Défauts:Peinture -- Défauts
Thermocinétique
ThermographieIndex. décimale : 667.9 Revêtements et enduits Résumé : A method of assessing uneven paint coatings is described, wherein a painted surface is rapidly heated by a light flash and the subsequent surface temperature changes are monitored using thermography. This method exploits the differences in dynamic heat transport caused by variations in paint thickness, using thermographic observation to track differences in temperature related to thickness. During trials with intentionally uneven test specimens spray coated with blackbody paint or red, blue, and green acrylic lacquers, we determined that surfaces with thinner paint coatings exhibited lower temperatures. Based on our findings, this article also discusses the theoretical basis of the detection method. While this technique can detect uneven painting, it is difficult to determine a quantitative relationship between temperature variations in the coated surfaces and paint thickness, since the relationship is dependent not only on the particular substrate and paint, but also on the optical reflectance of the paint. We consider that the proposed method is currently capable of detecting uneven paint coatings with variations in thickness of approximately 20 μm, although improvements in detection resolution are possible. Although detection sensitivity is somewhat low, this technique allows rapid analysis of coatings to assess evenness through visual examination. Note de contenu : - THEORETICAL FOUNDATIONS OF THE OBSERVATION METHOD : Thermal conduction in paint - Heat dissipation from the test piece
- SCOPE OF APPLICATIONDOI : 10.1007/s11998-013-9537-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-013-9537-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21450
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 3 (05/2014) . - p. 311-318[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16292 - Périodique Bibliothèque principale Documentaires Disponible The case of the mysterious hailstones / E. Bud Senkowski in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 30, N° 2 (02/2013)
[article]
Titre : The case of the mysterious hailstones Type de document : texte imprimé Auteurs : E. Bud Senkowski, Auteur ; Richard A. Burgess, Auteur Année de publication : 2013 Article en page(s) : p. 15-19 Langues : Américain (ame) Catégories : Adhésion -- Défauts
Délaminage
Epaisseur -- Défauts
Grêlons
Revêtements -- Défauts:Peinture -- Défauts
Revêtements -- Détérioration
Revêtements -- Entretien et réparations
Souplesse (mécanique)
Stress -- Effets physiologiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Specification writers, contractors, and coating manufacturers, at one time or another, have been blamed when installed coatings fail to meet service life expectations. However, rarely does the wrath of mother nature receive the blame for premature coating failure. In this cases from the F-files, an interior roof coating system reportedly failed because of localized impact on the roof exterior from large hailstones during a severe thunderstorm. Can this really happen, at least in this cases ? Let's find out. Note de contenu : - Background
- Site investigation
- Excessive coating thickness
- Flexibility losses
- Internal coating stress
- Lack of adhesive bond
- Other factors affecting coating adhesion
- Effect of hailstone damage
- Recommendations for repairPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17940
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 30, N° 2 (02/2013) . - p. 15-19[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14761 - Périodique Bibliothèque principale Documentaires Disponible