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Modes and mechanisms for the degradation of fusion-bonded epoxy-coated steel in a marine concrete environment / Tinh Nguyen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 1, N° 2 (04/2004)
[article]
Titre : Modes and mechanisms for the degradation of fusion-bonded epoxy-coated steel in a marine concrete environment Type de document : texte imprimé Auteurs : Tinh Nguyen, Auteur ; Jonathan W. Martin, Auteur Année de publication : 2004 Article en page(s) : p. 81-92 Note générale : Bibliogr. 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
Anticorrosifs
Anticorrosion
Barres d'armature
Béton renforcé de fibres
Corrosion
Epoxydes
Essais accélérés (technologie)
Métaux -- Revêtements protecteurs
Revêtement époxy lié par fusionIndex. décimale : 667.9 Revêtements et enduits Résumé : Fusion-bonded epoxy is used extensively to protect steel reinforcing bars from corrosion. This coating has proven to be a cost-effective material for increasing the service life of reinforced concrete structures. However, field observations have reported premature corrosion of fusion-banded epoxy-coated reinforcing bars used in marine concrete environments, leading to severe cracking and spalling of the reinforced concretes. This study was initiated to provide a better understanding of the modes and mechanisms of the corrosion of fusion-bonded epoxy-coated steel exposed in a marine concrete environment. Grit-blasted steel panels were coated with two commercial fusion-bonded powder epoxy coatings at two thicknesses. Half of the coated panels were scribed, the other half were non-scribed. The panels were immersed in a saturated calcium hydroxide aqueous solution containing 0.6 mole/liter sodium chloride maintained at either 35°C or 50°C. Degradation was characterized and followed by infrared thermography wet adhesion, and microscopic and analytical chemical techniques. Unscribed panels exhibited only water-induced adhesion loss, most of which was recovered after drying. However, in addition to the water-induced adhesion loss, scribed panels exhibited two modes of failure: anodic blistering near the scribe mark and cathodic delamination around the anodic blisters. Anodic blistering was attributed to localized crevice corrosion under the coating followed by blistering via an osmotic pressure mechanism. Cathodic delamination was probably induced by the alkaline cathodic reaction products, and water-induced adhesion loss was due to the presence of a water layer at the coating/steel interface. DOI : 10.1007/s11998-004-0002-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-004-0002-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3953
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 1, N° 2 (04/2004) . - p. 81-92[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 000586 - Périodique Bibliothèque principale Documentaires Disponible Modification of styrene-acrylic emulsion by organic UV absorber in synergy with fluorine and silicon monomers for weatherable coatings / Wei Dong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 2 (03/2022)
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Titre : Modification of styrene-acrylic emulsion by organic UV absorber in synergy with fluorine and silicon monomers for weatherable coatings Type de document : texte imprimé Auteurs : Wei Dong, Auteur ; Lei Zhou, Auteur ; Yanni Guo, Auteur ; Yining Tang, Auteur ; Rong Pan, Auteur ; Mengli Liu, Auteur ; Deliang He, Auteur Année de publication : 2022 Article en page(s) : p. 607-616 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Benzotriazole
Caractérisation
Copolymère styrène acrylique
Copolymères en émulsion
Enrobage (technologie)
Essais accélérés (technologie)
Fluorure de silicium
Formulation (Génie chimique)
Polymérisation en émulsion
Potentiel zeta
Rayonnement ultraviolet -- Absorption
Résistance aux conditions climatiques
Revêtements organiques
Stabilité thermiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : To improve the weather ability and thermal stability of styrene-acrylic polymer emulsion coatings, a series of novel styrene-acrylic polymer emulsion modified with 2-[2-hydroxy-5-[2-(methacryloyloxy)ethyl]phenyl]-2H-benzotriazole (HMEB), hexafluorobutyl methacrylate (HFMA), and vinyl-trimethoxysilane (VTMS) were prepared through semi-continuous seed emulsion polymerization. The emulsions and their coatings were characterized by Fourier transform infrared spectroscopy, ultraviolet absorption spectroscopy (UV-Vis), X-ray photoelectron spectroscopy, dynamic laser scattering, transmission electron microscopy, zeta potential, thermogravimetric analysis, and artificially accelerated aging test. According to the results, the new polymer emulsion had superior UV absorption from 308 to 364 nm. Moreover, the coating performed the best anti-aging stability when the content of HMEB, HFMA, and VTMS reached 4%, 2%, and 3%, respectively. After the 1000 h aging test, the color difference (ΔE) and rate of loss of gloss (ΔG) were only 6.86% and 51.10%, while the unmodified coatings were 16.05% and 72.22%, respectively. Furthermore, the thermal stability and water resistance of the coating were improved by fluorine and silicon monomers. The initial decomposition temperature was increased from 327 to 339°C. Moreover, the UV stabilization mechanism is preliminarily discussed. Note de contenu : - EXPERIMENTAL : Materials - Pre-emulsification - Emulsion polymerization - Coating preparation - Characterization
- RESULTS AND DISCUSSION : Basic properties of emulsions and the coatings - Zeta potential and DLS of emulsions - Morphology of emulsion particles - Chemical structure of emulsion polymer - Chemical composition of emulsion coatings - UV absorption property of coatings - Thermal stability of emulsion coating - The aging acceleration test of emulsion coatings - Protective properties of emulsion coatings
- Table 1 : Emulsion polymerization formula
- Table 2 : Basic properties of emulsions and the coatings
- Table 3 : Surface composition of different coatings/atomic %DOI : https://doi.org/10.1007/s11998-021-00550-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00550-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37291
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 2 (03/2022) . - p. 607-616[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23408 - Périodique Bibliothèque principale Documentaires Disponible Modified acrylic core-shell / Alann de Oliveira Piagentini Bragatto in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4619 (04/2016)
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Titre : Modified acrylic core-shell Type de document : texte imprimé Auteurs : Alann de Oliveira Piagentini Bragatto, Auteur ; Jorge Mayer de Oliveira, Auteur Année de publication : 2016 Article en page(s) : p. 22-25 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Revêtements protecteurs
Brillance (optique)
Core-Shell
Dispersions et suspensions
Essais accélérés (technologie)
Etudes comparatives
Hydrophobie
Polyacryliques
Vernis -- Propriétés mécaniques
Vernis en phase aqueuse
vernis en phase solvantIndex. décimale : 667.9 Revêtements et enduits Résumé : Evaluation of performance of exterior wood vanishes formulated with core-shell polymer dispersions, as an alternative to replacing solvent-based high performance coatings. En ligne : https://drive.google.com/file/d/1janAFh6XNIp5aLTM6MOf4TzNxu1ZRwr1/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26125
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 206, N° 4619 (04/2016) . - p. 22-25[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17963 - Périodique Bibliothèque principale Documentaires Disponible Molecular relaxation phenomena during accelerated weathering of a polyurethane coating / B. M. Dilhan Fernando in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 1 (03/2008)
[article]
Titre : Molecular relaxation phenomena during accelerated weathering of a polyurethane coating Type de document : texte imprimé Auteurs : B. M. Dilhan Fernando, Auteur ; Shi Xiaodong, Auteur ; Stuart G. Croll, Auteur Année de publication : 2008 Article en page(s) : p. 1-9 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Essais accélérés (technologie)
Polyuréthanes
PyrolyseLa pyrolyse est la décomposition ou thermolyse d'un composé organique par la chaleur pour obtenir d'autres produits (gaz et matière) qu'il ne contenait pas. L'opération est réalisée en l'absence d'oxygène ou en atmosphère pauvre en oxygène pour éviter l'oxydation et la combustion (L’opération ne produit donc pas de flamme). Il s'agit du premier stade de transformation thermique après la déshydratation.
Elle permet généralement d'obtenir un solide carboné, une huile et un gaz. Elle débute à un niveau de température relativement bas (à partir de 200 °C) et se poursuit jusqu'à 1 000 °C environ. Selon la température, la proportion des trois composés résultants est différente.
Relaxation moléculaire
Revêtements -- DétériorationIndex. décimale : 667.9 Revêtements et enduits Résumé : Results from a polyester-urethane (PU) coating system under accelerated weathering showed that crosslink density, obtained from high-temperature modulus data, diminished due to chain scission. However, Tg and room-temperature tensile modulus both increased with weathering. Molecular relaxation phenomena in polymers have long been investigated to explore changes occurring in a polymer at temperatures below its glass transition and were explored for an explanation to supplement chemical degradation for these observations. Relaxation was quantified using "enthalpy recovery" which first increased with exposure, then diminished. The concurrent physical and chemical aging effects were characterized by tracking nonexponentiality in the spectrum of relaxation times, and the size of "co-operatively relaxing regions" deduced from relaxation around the glass transition. Mechanical relaxation in this coating extended longer than cycle periods typical of accelerated weathering, suggesting that frequency effects might be important when comparing accelerated to natural weathering. DOI : 10.1007/s11998-007-9077-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-007-9077-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3608
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 5, N° 1 (03/2008) . - p. 1-9[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 009979 - Périodique Bibliothèque principale Documentaires Disponible
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Titre : Monitoring breakdowns : Photodegradation of multilayer automotive coatings tracked in detail Type de document : texte imprimé Auteurs : Marc Entenmann, Auteur ; Dennis Kock, Auteur ; Heinz Greisiger, Auteur ; Thadeus Schauer, Auteur Année de publication : 2013 Article en page(s) : p. 32-35 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automotile -- Peinture -- Détérioration
Essais accélérés (technologie)
Photo-oxydation -- Mesure
Photodétérioration
Revêtements multicouchesIndex. décimale : 667.9 Revêtements et enduits Résumé : In multilayer automotive coating systems, it is often the e-coat layer which degrades under weathering, leading to coating failure and corrosion. photo-oxidation index (POI) measurements on multi-coat systems showed that the POI of the e-coat increases during artificial weathering. This degradation process is influenced by both UV and thermocatalytic effects, so dark coatings increase e-coat degradation. Note de contenu : - Analysing photochemical degradation
- Performing the photooxidation measurements
- Effects of artificial weathering on e-coat
- Dark coatings increase e-coat degradation
- Thermocatalytic effeects on e-coat are significantEn ligne : https://drive.google.com/file/d/18hvqILOPHy5-OR1m95qFaMLPsJqTMHBI/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16964
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 1 (01/2013) . - p. 32-35[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 14463 - Périodique Bibliothèque principale Documentaires Disponible Monitoring of injection molding tool corrosion and effects of wood plastic compound's moisture on material properties / E. Steidl in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIII, N° 1 (03/2018)
PermalinkPermalinkMoving beyond the 25-year coating / Todd Williams in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 34, N° 12 (12/2017)
PermalinkNanoparticles for UV protection of clear wood coatings - field and laboratory trials / Stig L. Bardage in SURFACE COATINGS INTERNATIONAL, Vol. 96, 2 (04/2013)
PermalinkNatural and accelerated weathering testing. The right choice / Smrithi Kumar in PAINTINDIA, Vol. LVIII, N° 4 (04/2008)
PermalinkNatural weathering performance and the effect of light stabilizers in water-based coating formulations on resin-modified and dye-stained beech-wood / Bodo Caspar Kielmann in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 6 (11/2016)
PermalinkNew era in corrosion testing / Sean Fowler in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4598 (07/2014)
PermalinkNew D-Iso/NPG gelcoat offers exceptional UV colour stability / Dean Bugg in JEC COMPOSITES MAGAZINE, N° 67 (08-09/2011)
PermalinkA new pigment for smart anticorrosive coatings / C. Deyà in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 2 (06/2007)
PermalinkNew silane-terminated polymers for sealants and adhesives / Lars Lander in ADHESION - ADHESIVES + SEALANTS, Vol. 15, N° 2/2018 (2018)
PermalinkA new test method for weatherability prediction by using a remote plasma reactor / M. Akahori in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 89, B2 (06/2006)
PermalinkNew UV-curing wood coatings for exterior applications / Stefan Friebel in EUROPEAN COATINGS JOURNAL (ECJ), N° 1-2/01 (01-02/2001)
PermalinkNews perspectives on weathering testing / Allen Zielnik in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 205, N° 4612 (09/2015)
PermalinkNon-isocyanate coatings with fast return to service and excellent appearance for industrial flooring application / Ulises Brauer in COATINGS TECH, Vol. 18, N° 7 (07/2021)
PermalinkNovel acrylic polymer for architectural exterior paint and primer in one coatings application / Kaliappa Ragunathan in COATINGS TECH, Vol. 15, N° 2 (02/2018)
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