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Polyaspartic coatings protect virginia steel brifges for more than a decade / Ahren Olson in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4624 (09/2016)
[article]
Titre : Polyaspartic coatings protect virginia steel brifges for more than a decade Type de document : texte imprimé Auteurs : Ahren Olson, Auteur ; Todd Williams, Auteur ; Mark Hudson, Auteur ; C. Wayne Fleming, Auteur Année de publication : 2016 Article en page(s) : p. 21-26 Note générale : Bibliogr. Langues : Anglais (eng) 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 protecteurs
Polyuréthanes
Ponts métalliques -- Revêtements protecteurs
Primaire (revêtement)
Revêtements multicouches
ZincIndex. décimale : 667.9 Revêtements et enduits Résumé : A study on the use of a high-build, two-coat polyaspartic urethane coating system, showed increases in productivity, with a zinc-rich primer for the protection of steel bridges.
This research concerns the field performance of PAS two-coat coating systems and further validated the technology's excellent corrosion prevention noted in many previous investigations. With performance being equal, PAS two-coat systems can provide significant value to bridge owners in the form of overall cost reduction in painting operations, accelerated painting schedules and milder traffic congestion headaches. An extra performance benefit : PAS two-coat systems also exhibit excellent edge protection areas in which corrosion is most likely to start.
However, this study also demonstrated that all coatings applied to steel bridges with timber bridge decks provided reduced corrosion protection than the same coatings applied to steel bridges with concrete decks. The reduced coating performance in timber deck bridges was caused by the flexing and spacing of deck timbers, which allowed road salts and water to penetrate to the steel girder, accelerating corrosion.Note de contenu : - BRIDGE DESCRIPTIONS AND INSPECTION PROCEDURE
- BRIDGES WITH CONCRETE DECKS : MCU three-coat system with concrete deck - PAS two-coat system with concrete deck
- BRIDGES WITH TIMBER DECKS : MCU three-coat system with timber deck and asphalt overlay - PAS two-coat system with timber deck and asphalt overlay
- TRUSS BRIDGES : Truss bridges with timber decks and asphalt overlayEn ligne : https://drive.google.com/file/d/16bRlc5av3xOh2urm_WMdTrxGmBdZYijN/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27740
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 206, N° 4624 (09/2016) . - p. 21-26[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18317 - Périodique Bibliothèque principale Documentaires Disponible Polyelectrolytes fabrication on magnesium alloy surface by layer-by-layer assembly technique with antiplatelet adhesion and antibacterial activities / Mengke Peng in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 3 (05/2019)
[article]
Titre : Polyelectrolytes fabrication on magnesium alloy surface by layer-by-layer assembly technique with antiplatelet adhesion and antibacterial activities Type de document : texte imprimé Auteurs : Mengke Peng, Auteur ; Xiaodan Zhang, Auteur ; Xiao Xiao, Auteur ; Mengjin Dong, Auteur ; Guowei Zhao, Auteur ; Peng Liu, Auteur ; Yashao Chen, Auteur ; Changhao Wang, Auteur Année de publication : 2019 Article en page(s) : p. 857-868 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion antiplaquettaire
Antibactériens
Anticorrosifs
Anticorrosion
Caractérisation
LysozymeLe lysozyme est une protéine globulaire formée de 129 acides aminés (chez l'être humain), que l'on rencontre dans un certain nombre de sécrétions (larmes, salive, lait maternel, mucus...) et dans le blanc d'œuf, chez de nombreuses espèces d'animaux, dont insectes et acariens1.
Il s'agit d'une hydrolase acide (EC 3.2.1.17) sécrétée par les granulocytes et les monocytes. Elle détruit la paroi bactérienne en catalysant l'hydrolyse des peptidoglycanes la constituant.
Magnésium -- Alliages
Polyélectrolytes
Polyéthylènimines
Revêtements multicouchesIndex. décimale : 667.9 Revêtements et enduits Résumé : Magnesium alloy (MgA) was widely used in biomedical field owing to its good biocompatibility and degradability. The surface of MgA was usually modified to improve its corrosion resistance, biocompatibility, and biological properties. Herein, we employed a layer-by-layer assembly technique to assemble both polyanionic and polycationic electrolytes onto the microarc oxidation-treated MgA surface to yield MgA-MgO-PEI-[Ge(HANPs)/Lzm]50, where the gelatin-conjugated hydroxyapatite nanoparticles [Ge(HANPs)] are the polyanionic electrolyte, lysozyme (Lzm) is the polycationic electrolyte, and polyethyleneimine (PEI) is the transition layer. The morphology and chemical composition of MgA-MgO-PEI-[Ge(HANPs)/Lzm]50 were characterized by X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy, indicating that [Ge(HANPs)/Lzm]50 were successfully fabricated on the surface of MgA-MgO. The surface of MgA-MgO-PEI-[Ge(HANPs)/Lzm]50 exhibited good hydrophilicity as evidenced by the low water contact angle of 24.5°. Excellent corrosion resistance of MgA-MgO-PEI-[Ge(HANPs)/Lzm]50 was obtained since it can decrease about four orders of magnitude of corrosive current (Icorr) compared to pristine MgA. The biological assay for MgA-MgO-PEI-[Ge(HANPs)/Lzm]50 showed good antiplatelet adhesion and excellent antibacterial activities against both E. coli and S. aureus. Note de contenu : - EXPERIMENTAL : Materials - Preparation of hydroxyapatite nanoparticles (HANPs) - Preparation of MgA with MAO treatment (MgA-MgO - Preparation of MgA-MgO-PEI[Ge(HANPs)/Lzm]50 - Characterizations for morphologies and composition - Water contact angle (WCA) measurement - Potentiodynamic polarization test - Antiplatelets adhesion assay - Antibacterial assay - Determination of release of lysozyme
- RESULTS AND DISCUSSION : Morphology and phase structure of HANPs - Morphology and composition of different MgA samples - Hydrophilicity analysis of different MgA samples - Anticorrosive performance of MgA-MgO-PEI[Ge(HANPs)/Lzm]50 - Antiplatelets adhesion assay of MgA-MgO-PEI[Ge(HANPs)/Lzm]50 - Antibacterial assay of MgA-MgO-PEI[Ge(HANPs)/Lzm]50 - Lysozyme release behavior of MgA-MgO-PEI[Ge(HANPs)/Lzm]50DOI : 10.1007/s11998-018-00162-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-00162-6.pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32597
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 3 (05/2019) . - p. 857-868[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20953 - Périodique Bibliothèque principale Documentaires Disponible Practical in-plant evaluation of two FBE abrasion-resistant overcoat systems / Emre Aksu in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL), Vol. 33, N° 7 (07/2016)
[article]
Titre : Practical in-plant evaluation of two FBE abrasion-resistant overcoat systems Type de document : texte imprimé Auteurs : Emre Aksu, Auteur ; Alan Kehr, Auteur ; Matt Dabiri, Auteur Année de publication : 2016 Article en page(s) : p. 22-29 Langues : Américain (ame) Catégories : Adhésion
Anticorrosion
Eau chaude
Epoxydes
Essais de résilience
Essais dynamiques
Porosité
Qualité -- Contrôle
Résistance à l'abrasion
Résistance à la fusion
Revêtement époxy lié par fusion
Revêtements -- Propriétés mécaniques
Revêtements multicouches
Revêtements protecteurs
Souplesse (mécanique)
Test d'immersion
Tuyauterie
Tuyauterie -- ProtectionIndex. décimale : 667.9 Revêtements et enduits Résumé : In this article, the authors illustrate a comparison between a new flexible version of an abrasion-resistant overcoat (ARO) coating system and two ARO coatings at a total thickness of 20 mils, two single-layer fusion-bonded epoxy (FBE) coatings, and two dual-layer FBE (2LFBE) systems at a thickness of 60 mils. Note de contenu : - Coating process
- Thickness of evaluated systems
- The cathodic disbondment test (CDT) : Short-term cathodic disbondment testing - Long-term cathodic disbondment testing - Flexibility
- Hot-water soak adhesion (HWS)
- Porosity
- FIGURES : 1. For this set of tests, a profilometer measured a peak to valley height of 70-to-100 µm (~3 – 4 mil) and an average peak count of 41/cm (104/in) - 2. Both the short- and long-term CD tests were conducted at 65 C (150 F), -3.5 V (calomel reference electrode) and a 3-percent NaCl electrolyte - 3. Short-term cathodic disbondment results - 4. Long-term cathodic disbondment results - 5. A crack on a bended sample under 40 times magnification. Any coating crack seen at 40 times magnification constituted a failure - 6. While the flexible ARO layer showed a low level of porosity, almost none was seen in the remaining samples for either layer - 7. Average passing impact resistance results
- TABLES : 1. Different coating thickness systems for the tests - 2. Average flexibility results for different mandrels - 3. Average hot water soak adhesion results - 4. Average porosity ratings of coating layers - 5. Test averages according to coating typeEn ligne : http://www.paintsquare.com/archive/?fuseaction=view&articleid=5867 Format de la ressource électronique : Web Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28418
in JOURNAL OF PROTECTIVE COATINGS & LININGS (JPCL) > Vol. 33, N° 7 (07/2016) . - p. 22-29[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18240 - Périodique Bibliothèque principale Documentaires Disponible Preparation, characterizations, and antibacterial properties of Cu/SnO2 nanocomposite bilayer coatings / Takuya Fukumura in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 2 (03/2018)
[article]
Titre : Preparation, characterizations, and antibacterial properties of Cu/SnO2 nanocomposite bilayer coatings Type de document : texte imprimé Auteurs : Takuya Fukumura, Auteur ; Ekambaran Sambandan, Auteur ; Hiromi Yamashita, Auteur Année de publication : 2018 Article en page(s) : p. 437-443 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antimicrobiens
Cuivre
Dioxyde d'étain
Photocatalyse
Pulvérisation cathodique
Revêtements multicouchesIndex. décimale : 667.9 Revêtements et enduits Résumé : A nano-bilayer structure consisting of copper and SnO2 nanocomposites was prepared by a magnetron sputtering method. A nano-SnO2 thin layer with a thickness of 52 nm was achieved on quartz glass. A nano-copper layer was then deposited on top of the SnO2 thin layer by the sputtering method. The thickness of the nano-copper layer was approximately 7 nm, such that the SnO2 layer was not only completely covered by the copper layer but it also resulted in transparent bilayer films. Post-annealing was carried out at 400°C in air for 1 h to obtain a crystalline SnO2 phase and simultaneously the copper layer was oxidized to CuO. Sputtered nanocomposites of CuO/SnO2 bilayer films showed a synergistic effect toward E. coli inactivation under indoor light exposure. A possible mechanism for the synergistic effect with respect to the antibacterial properties of CuO/SnO2 bilayer nanocomposites has been proposed. Incorporating CuO onto the SnO2 layer achieves photocatalyst works under indoor light and provides an antimicrobial function even under a dark environment by the antimicrobial property of CuO itself. Reported CuO/SnO2 sputter coating can be useful to apply, for instance, to electric devices such as touch panel displays in a hospital in order to reduce hospital-acquired infections (HAIs). Note de contenu : - EXPERIMENTAL DETAILS : Sputtering of Cu/SnO2 nanocomposite bilayers - Evaluation of antimicrobial activities
- RESULTS AND DISCUSSION : Merits of nano-SnO2 thin films - ESCA and powder XRD of nano-SnO2 thin films - Antimicrobial effect of sputtered Cu/SnO2 nanocomposite bilayer films - Proposed Cu/SnO2 nanocomposite bilayer structures - Proposed synergetic effect of CuO/SnO2 nanocomposite bilayer -DOI : 10.1007/s11998-017-0017-4 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0017-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30302
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Code-barres Cote Support Localisation Section Disponibilité 19742 - Périodique Bibliothèque principale Documentaires Disponible Preparation of polysiloxane coating for laser application with improved curing property based on copolymerization modification / Tian-Yu Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 4 (07/2022)
[article]
Titre : Preparation of polysiloxane coating for laser application with improved curing property based on copolymerization modification Type de document : texte imprimé Auteurs : Tian-Yu Wang, Auteur ; Wei Yang, Auteur ; Hao-Hao Hui, Auteur ; Xiang-Yang Lei, Auteur ; Qing-Hua Zhang, Auteur ; Jian Wang, Auteur ; Qiao Xu, Auteur ; Xue-Ran Deng, Auteur Année de publication : 2022 Article en page(s) : p. 1233-1241 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Copolymérisation
Lasers -- Applications industrielles
Nanoparticules
Revêtement antireflet
Revêtements -- Propriétés mécaniques
Revêtements multicouches
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : The sol-gel method is an important process for the preparation of laser frequency conversion components, such as dihydrogen phosphate (KDP), which are often employed in high-power laser facility. Methyltriethoxysilane (MTS) precursor is a typical matrix to prepare polysiloxane under hydrolysis and polycondensation process. Further coating and curing procedure is applied to obtain desired polysiloxane coating which acts as the moisture-proof and refractive index matching layer. Subsequently, an antireflective coating is prepared over this polysiloxane coating (a bilayer coating system) to realize ultrahigh transmission at desired wavelengths. Due to the low curing temperature (limited by the phase transition temperature of KDP), current MTS-polysiloxane coating could not be completely cured and inter-coating permeation between this bilayer coating system would lead to deterioration of coating properties. Thus, copolymerization of MTS and tetraethylorthosilicate (TEOS) is adopted to fabricate the polysiloxane coating with improved curing property (denser structure and higher hardness after curing). It is found that under certain molar ratio of MTS to TEOS, the structure of modified polysiloxane coating could be effectively densified and the coating hardness increases significantly. Meanwhile, the bilayer coating system still exhibits excellent transmission, high laser-induced damage threshold as well as satisfactory moisture resistance. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of polysiloxane solution - Preparation of silica nanoparticle sol - Fabrication of polysiloxane coating and antireflective bilayer coating system - Characterization
- RESULTS AND DISCUSSION : Synthesis process - Molecular structure of polysiloxane - Mechanical properties - Bilayer performanceDOI : https://doi.org/10.1007/s11998-021-00605-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00605-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38050
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