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Homogeneous dispersion of cellulose/graphite oxide nanofibers in water-based urushiol coatings with improved mechanical properties and corrosion resistance / Lei Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)
[article]
Titre : Homogeneous dispersion of cellulose/graphite oxide nanofibers in water-based urushiol coatings with improved mechanical properties and corrosion resistance Type de document : texte imprimé Auteurs : Lei Zhang, Auteur ; Haitang Wu, Auteur ; Chonglin Zhao, Auteur ; Lingce Kong, Auteur ; Xiaohua Huang, Auteur Année de publication : 2023 Article en page(s) : p. 1649-1660 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Caractérisation
CelluloseLa cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Greffage (chimie)
Matériaux hybrides
Nanofibres
Oxyde de graphène
Revêtements -- Propriétés mécaniques
Revêtements en phase aqueuse
Revêtements organiques
UrushiolL’urushiol est une toxine organique que l'on trouve dans les plantes de la famille des Anacardiaceae, spécialement dans le genre Toxicodendron (par exemple le sumac grimpant en Amérique du Nord). Il provoque des allergies de la peau ou dermatites, pouvant être importantes, au contact de ces plantes. Le nom vient du mot japonais urushi (漆?), qui désigne une laque produite dans l'Asie orientale à partir du suc des arbres kiurushi (arbre à laque). L'oxydation et la polymérisation de l'urushiol dans le suc de l'arbre en présence d'humidité permet de former une laque dure utilisée traditionnellement pour produire des objets d'art laqués en Chine et au Japon.Index. décimale : 667.9 Revêtements et enduits Résumé : A polymeric coating based on a reactive urushiol-based polymeric emulsion was synthesized by grafting cellulose nanofibers (CNF) and graphene oxide (GO) onto the urushiol backbone, followed by phase inversion to obtain a cellulose nanofiber-graphene oxide/water-based urushiol emulsion (GO-CNF/WU). Following silane treatment (APTES), well-dispersed CNF-GO composites were obtained due to molecular interactions at the interface (including covalent, π-π and hydrogen bonding) between CNF and GO, resulting in a WU polymer which served as a mixing matrix to stabilize and improve the resulting GO-CNF through chemical-crosslinking. As expected, the mechanical properties (hardness and adhesion) and anticorrosion protection of the WU films were improved considerably after incorporating GO-CNF composites at fairly low concentrations. Compared to the WU film, the coated tinplate with the GO-CNF/WU coating displayed higher anticorrosion efficiency, with a PE of 99%. In addition, the pencil hardness of the GO-CNF/WU coatings increased significantly, from 2 to 6H, and adhesion was remarkably enhanced from grade 6 to 1 after the addition of 10% MGO to the films. Due to the synergistic protective effect of CNF and GO, the method may represent a facile and environmentally friendly approach to integrate multi-nanoscale blocks into WU polymer with excellent mechanical properties and corrosion resistance. Note de contenu : - MATERIALS AND METHODS : Materials - Preparation of GO-CNF suspensions - Preparation of the water-based O/W urushiol emulsion - Film preparation - Characterization of the GO-CNF/WU composite coating
- RESULTS AND DISCUSSION : FTIR characterization - XRD characterization - XPS analysis - Micromorphology of WU films - Electrochemical behavior - Mechanical properties
- Table 1 : Atomic concentrations and relative carbon composition of samples
- Table 2 : Impedance measurements and protection efficiencies of WU coatings containing GO and CNF in 3.5% NaCl at 25°C
- Table 3 : Mechanical properties of pure WU, GO/WU, CNF/WU and GO-CNF/WU composite coatingsDOI : https://doi.org/10.1007/s11998-023-00770-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00770-x.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39978
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 5 (09/2023) . - p. 1649-1660[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24242 - Périodique Bibliothèque principale Documentaires Disponible Horizon 2017 gamme industrielle sans CrVI in GALVANO ORGANO, N° 829 (05/2014)
[article]
Titre : Horizon 2017 gamme industrielle sans CrVI Type de document : texte imprimé Année de publication : 2014 Article en page(s) : p. 26-28 Langues : Français (fre) Catégories : Aluminium -- Alliages
Anticorrosion
Chrome hexavalent -- Suppression ou remplacement
Métaux -- Oxydation anodique
Métaux -- Revêtements protecteursIndex. décimale : 671.73 Revêtement, galvanoplastie Résumé : A ce jour, la chromatation (Alodine 1200) et l'oxydation anodique chromique suivie du colmatage bichromaté sont deux traitement référence pour la protection anticorrosion des alliages d'aluminium dans le secteur aéronautique. Cependant, ces procédés sont susceptibles d'être interdits dès 2017. Il devient donc urgent de qualifier une alternative à ces procédés utilisés depuis plusieurs décennies. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21558
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Code-barres Cote Support Localisation Section Disponibilité 16301 - Périodique Bibliothèque principale Documentaires Disponible How coating protect steel / Robert Barnhart in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 30, N° 2 (02/2013)
[article]
Titre : How coating protect steel Type de document : texte imprimé Auteurs : Robert Barnhart, Auteur Année de publication : 2013 Article en page(s) : p. 67-71 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.
Anticorrosifs
Anticorrosion
Métaux -- Revêtements protecteursIndex. décimale : 667.9 Revêtements et enduits Résumé : Previously, we discussed corrosion and mentioned that the function of the coating was to break the circuit by isolating steel from moisture (electrolyte). Actually, there is more to it than that. There are three ways by which coatings protect steel : barrier protection, inhibition, and sacrificial action. But some basic information is needed before we can explain these mechanisms and show which coatings protect by each of the mechanisms. Note de contenu : - Basic components of coatings
- Paints, coatings, and coating systems
- Function of each coat
- Mechanisms of protectionPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18036
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Code-barres Cote Support Localisation Section Disponibilité 14761 - Périodique Bibliothèque principale Documentaires Disponible How to prepare galvanizing for painting / E. Bud Senkowski in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 11 (11/2016)
[article]
Titre : How to prepare galvanizing for painting Type de document : texte imprimé Auteurs : E. Bud Senkowski, Auteur Année de publication : 2016 Article en page(s) : p. 14-21 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.
Anticorrosifs
Anticorrosion
Galvanisation
Métaux -- Revêtements protecteurs
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : Galvanizing presents many challenges to painting operations. While the zinc coating can add substantial life to steel surfaces, its surface chemistry and electrochemical activity can result in conditions leading to adhesion failures of applied organic coatings. The key to successful painting lies in recognizing the many surface conditions presented by new and weathered galvanizing and then employing effective cleaning operations to mitigate their effect. Success is ultimately achieved by selecting coating products that will develop a strong and enduring bond to the galvanized surface. Note de contenu : - WHAT IS GALVANIZING ?
- TYPES OF GALVANIZING
- HOW LONG WILL ZINC PROTECT STEEL ?
- HOW DOES ZINC DETERIORATE ?
- WHY DO WE PAINT GALVANIZING ? : To replace lost corrosion protection - To extend galvanizing life with a duplex system - To improve appearance
- PROBLEMS WITH PAINTING GALVANIZING
- SURFACE CONTAMINANTS : Oil and grease - Zinc oxide - Wet storage stain - Chromate conversion coatings - Rust
- NEWLY GALVANIZED STEEL
- PARTIALLY WEATHERED GALVANIZED STEEL : Phosphate conversion coatings - Basic zinc chromate-vinyl butyral wash primer - Acidic acrylic pretreatment
- FULLY WEATHERED GALVANIZED STEEL
- COATING CHOICES FOR GALVANIZING : Avoiding saponification
- VALUABLE REFERENCES
- FIGURES : 1. Hot-dip galvanizing bath - 2. Coating delamination at a galvanized surface - 3. Coating delamination from galvanized roof panelsEn ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=5950 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28381
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Code-barres Cote Support Localisation Section Disponibilité 18510 - Périodique Bibliothèque principale Documentaires Disponible Hubble bubble rising / Vijay Datta in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 34, N° 12 (12/2017)
[article]
Titre : Hubble bubble rising : A new beginning, the better way Type de document : texte imprimé Auteurs : Vijay Datta, Auteur ; Carl Reed, Auteur ; Mike O'Donoghue, Auteur Année de publication : 2018 Article en page(s) : p. 26-35 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse des défaillances (fiabilité)
Anticorrosion
Cloquage (défauts)
Délaminage
Essais (technologie)
Essais accélérés (technologie)
Essais d'adhésion
Essais de résilience
Revêtements protecteurs
Spécifications
Test d'immersionIndex. décimale : 667.9 Revêtements et enduits Résumé : This article examines the flaws of the current system of establishing and using specifications and testing. Because these flaws are so odious, a “better way” will be proposed in order to provide the end user real value in the use of protective coatings. Three tests will be discussed as illustrative examples of the flaws in the current system of using specifications and testing. These three tests are accelerated corrosion testing, pull-off adhesion testing, and constant stress, chemical immersion testing. Notwithstanding, this monograph will show how these tests, as examples of testing in general, can be used in a manner that provides the end user real value. Note de contenu : - It all begins with the specification : Conventional wisdom specifications - Hand-me-down specifications - Common-use specifications
- Relevance : Either you have it or you don't
- Through all the arbitrary rationale
- Test data and the law of unintended consequences
- WAC-KY expectations, WAC-KY testing, WAC-KY specifications
- Not even close to the mark
- We've got to get together sooner or later because the revolution's here and you know it's right
- Fig. 1. Passing and non-passing scribe test results
- Fig. 2. Example of cathodic delamination
- Fig. 3. Pull-off adhesion showing at least three different loci of failure
- Fig. 4. Blistering failure from a WAC vesselEn ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=6210 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30360
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Code-barres Cote Support Localisation Section Disponibilité 19542 - Périodique Bibliothèque principale Documentaires Disponible Huge sanitation project relies on GRP pipes in JEC COMPOSITES MAGAZINE, N° 77 (12/2012)
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