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A study of water at the organic coating/substrate interface / Tinh Nguyen in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 66, N° 834 (07/1994)
[article]
Titre : A study of water at the organic coating/substrate interface Type de document : texte imprimé Auteurs : Tinh Nguyen, Auteur ; Dale Bentz, Auteur ; Eric Byrd, Auteur Année de publication : 1994 Article en page(s) : p. 39-49 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Chimie des surfaces
Couches minces
Décollement cathodique (revêtement)
Humidité -- Absorption
Revêtements -- Détérioration
Revêtements:PeintureIndex. décimale : 667.9 Revêtements et enduits Résumé : Quantitative information on the water layer at the coating/substrate interface is crucial for understanding and preventing the failure of organic coating systems. A method, based on a two-layered model derived rigorously from internal reflection theory, was developed for determining the amount and thickness of water at the organic coating/substrate interface. The method gives new insight into the processes by which water degrades the coating/substrate bonds. The method requires application of a transparent or opaque organic coating of sufficient thickness on an internal reflection element (IRE), which is used as the substrate. A water chamber is attached to the coated specimen (...) Note de contenu : - THEORETICAL FORMULATION
- EXPERIMENTAL SECTION: FTIR-MIR in situ measurements on coated specimens exposed to water - FTIR-MIR analysis of water on Ge and SiO2-Si substrates - Water uptake in free films of coating
- RESULTS AND DISCUSSION: FTIR-MIR in situ measurements on coated specimens exposed to water
- QUANTITATIVE ANALYSES: FTIR-MIR probing depth in organic coating/substrate sample - Water uptake in the coatings - Thickness and amount of water at the coating/substrate interface - DiscussionPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18654
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 66, N° 834 (07/1994) . - p. 39-49[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003468 - Périodique Bibliothèque principale Documentaires Disponible 003481 - Périodique Bibliothèque principale Documentaires Exclu du prêt The case of the spotty disbondment in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 34, N° 8 (08/2017)
[article]
Titre : The case of the spotty disbondment Type de document : texte imprimé Année de publication : 2017 Article en page(s) : p. 14-19 Langues : Américain (ame) Catégories : Analyse des défaillances (fiabilité)
Décollement cathodique (revêtement)
Epoxydes
Expertises
Haut extrait sec
Métaux -- Revêtements protecteurs
Réservoirs (récipients)
Réservoirs (récipients) -- revêtements protecteurs
Revêtements -- Défauts:Peinture -- DéfautsIndex. décimale : 667.9 Revêtements et enduits Résumé : The author examined a tank of the floating-roof some 100 feet in diameter and hidden a mile off a two-lane blacktop. It was a vivid white storage tank and showed bright in stark and gleaming contrast to the head-high, green corn and golden silk of the ears.
The facility was spotless and cleaned and the tank was vented.
The tank interior was pristine but for the various areas of peeling and otherwise distressed paint.
The tank was designed to store wastewater mixed with petroleum byproducts. The exact contents were not revealed but it was a unique blend and no one knew quite how the material would interact with the coating system.
It was reported that the epoxy coating system had been installed six years earlier and purported to be high-solids (greater than 98 percent) applied at approximately 20 mils. There were discrepancies as to whether a primer was used during the initial install and whether or not repairs had taken place during the application. One account indicated that during the initial application some large areas on the floor were too thin and the material was re-sprayed.Note de contenu : - Signs of trouble
- The visual inspection
- Getting up close and personal
- Surface prep
- Solving in the mystery
- Do you know ?
- The awner(s)
- Problem number one, two and three
- Recommendations
Fig. 1. The epoxy is clearly peeling away from the substrate. All figures courtesy of the author unless otherwise noted
Fig. 2. The scalloped area highlighted by the blue area shows evidence of good adhesion
Fig. 3. In some areas of the tank floor, the chips of coating coming off were dirty on the bottom side
Fig. 4. In some areas of the tank floor, the chips of coating coming off were clean on the bottom side
Fig. 5. Stills from a video that show areas of disbondment and poor adhesion found sporadically throughout the tank
Fig. 6. The football-shaped, damaged sections exhibiting a cohesive failure were only found in areas such as lap welds, the sump lip and slightly raised sections of the tank floor
Fig. 7. Stills from a second video show the disbonded coating coming off where the back side of the coating appears to be contaminated with dirt, or more likely, with dust from blasting
Fig. 8. The steel substrate in the failing areas examined had a peened, crater-like profile (left) and not an angular one as was required (right)En ligne : http://www.paintsquare.com/archive/index.cfm?fuseaction=view&articleid=6105 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29162
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 34, N° 8 (08/2017) . - p. 14-19[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19078 - Périodique Bibliothèque principale Documentaires Disponible When a good idea goes bad / Rick A. Huntley in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 30, N° 3 (03/2013)
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Titre : When a good idea goes bad Type de document : texte imprimé Auteurs : Rick A. Huntley, Auteur Année de publication : 2013 Article en page(s) : p. 15-19 Langues : Américain (ame) Catégories : Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Adhésion
Cloquage (défauts)
Décollement cathodique (revêtement)
Délaminage
Epoxydes
Métaux -- Revêtements:Métaux -- Peinture
Polyurée
Polyuréthanes
Primaire (revêtement)
Revêtements -- Analyse:Peinture -- Analyse
Revêtements -- Défauts:Peinture -- Défauts
Revêtements bi-composant:Peinture bi-composant
Revêtements:Peinture
Spectrométrie infrarougeIndex. décimale : 667.6 Peintures Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18787
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 30, N° 3 (03/2013) . - p. 15-19[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14951 - Périodique Bibliothèque principale Documentaires Disponible