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Effective incorporation of ZnO nanoparticles by miniemulsion polymerization in waterborne binders for steel corrosion protection / Stefano Chimenti in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 4 (07/2017)
[article]
Titre : Effective incorporation of ZnO nanoparticles by miniemulsion polymerization in waterborne binders for steel corrosion protection Type de document : texte imprimé Auteurs : Stefano Chimenti, Auteur ; Jesús Manuel Vega, Auteur ; Miren Aguirre, Auteur ; Eva García-Lecina, Auteur ; José Antonio Díez, Auteur ; Hans-Jurgen Grande, Auteur ; María Paulis, Auteur ; Jose Ramon Leiza, Auteur Année de publication : 2017 Article en page(s) : p. 829-839 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.
Anticorrosifs
Anticorrosion
Liants
Métaux -- Revêtements protecteurs
Miniémulsions
Nanoparticules
Oxyde de zinc
Polymérisation en émulsion
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : A nanohybrid waterborne binder was synthesized by miniemulsion polymerization with the incorporation of ZnO nanoparticles in order to increase the corrosion protection capability. This system was compared to a neat waterborne binder and to a physical blend of the binder with an aqueous ZnO nanoparticles dispersion. The hybrid dispersion was characterized by SEM and TEM, while the corrosion behavior of these latexes was investigated by electrochemical measurements (open circuit potential and electrochemical impedance spectroscopy in 3.5 wt% NaCl solution), evaluating the effect of the incorporation of these nanoparticles into the polymeric matrix. The incorporation of ZnO nanoparticles by blending showed similar behavior to the neat coating despite flash rust reduction on the metal surface. In contrast, the hybrid binder prepared by miniemulsion polymerization has shown the best performance according to the values of pore resistance (Ri) and coating capacitance (Cc). In general, this study shows how useful can be the miniemulsion polymerization methodology to design hybrid coating formulations, obtaining homogenous distribution of ZnO nanoparticles within the film. Indeed, a heterogeneous distribution can hinder the effectiveness and the corrosion protection capabilities of promising nanoparticles. Note de contenu : - EXPERIMENTAL : Materials - Miniemulsion polymerizations and blend preparation - Coating application - Characterization methods
- RESULTS AND DISCUSSION : ZnO nanoparticles wettability - Polymerization kinetics - Film formation - Corrosion evaluationDOI : 10.1007/s11998-017-9958-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9958-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28925
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Code-barres Cote Support Localisation Section Disponibilité 19194 - Périodique Bibliothèque principale Documentaires Disponible Electrochemical impedance spectroscopy as a tool for investigating the quality and performance of coated food cans / P. kern in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 899 (12/1999)
[article]
Titre : Electrochemical impedance spectroscopy as a tool for investigating the quality and performance of coated food cans Type de document : texte imprimé Auteurs : P. kern, Auteur ; J. Lange, Auteur Année de publication : 1999 Article en page(s) : p. 67-74 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aliments -- Emballages
Can coating
Electrochimie
Industries agro-alimentaires -- Emballages
Qualité -- Contrôle
Spectroscopie d'impédance électrochimique
VernisIndex. décimale : 667.9 Revêtements et enduits Résumé : In the present work, electrochemical impedance spectroscopy (EIS) is explored as a tool for evaluating the quality of coatings on food cans. The properties of the coating-metal interface are evaluate using an equivalent electrical circuit representing intact and defect coating areas. The element corresponding to the charge transfer capacitance under pores, proportional to the wetted metal surface, is found to be the most useful element for quality evaluation. It is shown that with EIS, differences can be detected between new and filled cans from different suppliers, as well as between different product formulations. Three measurement techniques, i.e., initial state characterization, rapid dc aging and long-term electrolyte aging, are applied to a series of pet-food and beveroge cans, and the results compared with the performance of the same cans after filling and storage. It 15 shown that all three measurement techniques give basic guidance as to the long-term performance of the filled cans. However, the electrolyte-aging test was found to give the best precision in the performance prediction. Note de contenu : - EXPERIMENTAL : Materials - EIS measurement routines - Methods
- RESULTS AND DISCUSSION : Evaluation of the equivalent electrical circuit - Initial state characterization and dc tests - Long-term measurements - Accelerated tests vs. performance of filled cansPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17949
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Code-barres Cote Support Localisation Section Disponibilité 003566 - Périodique Bibliothèque principale Documentaires Disponible Electrochemical impedance spectroscopy evaluation of various aluminum pretreatments painted with epoxy primer / Stephen. M. Cohen in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 859 (08/1996)
[article]
Titre : Electrochemical impedance spectroscopy evaluation of various aluminum pretreatments painted with epoxy primer Type de document : texte imprimé Auteurs : Stephen. M. Cohen, Auteur Année de publication : 1996 Article en page(s) : p. 73-81 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Alliages
Couches minces
Diélectriques
Epoxydes
Matériaux -- Propriétés électriques
Métaux -- Oxydation anodique
Porosité
Primaire (revêtement)
Spectroscopie d'impédance électrochimique
Traîtements de surfaceIndex. décimale : 667.9 Revêtements et enduits Résumé : Panels of aerospace aluminum (Al) alloys 2024 (UNS A92024) and 7075 (UNS A97075) were coated with four pretreatments (thin-film sulfuric-acid [H2SO4] anodization, chromic-acid anodization, and two commercial silica-based gels). Some of these panels were painted with chromated epoxy primer (MIL-P-23377D). All panels were subjected to several months of monitoring by electrochemical impedance spectroscopy (EIS) at open-circuit potential. Several panels were also subjected to EIS measurements made at various applied potentials. Equivalent circuit simulations indicate that a model like that proposed by van Westing, et al., which includes four time-constants (coating, pore, double-layer, and pretreatments) fits the data well. The epoxy primer is shown to be a highly porous, non-barrier coating. Note de contenu : RESULT AND DISCUSSION : Equivalent circuit used - Dielectric constant and barrier properties of the primer - Dielectric properties of the underlying pretreatment - Measurements under distilled water - Polarization measurements Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18431
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Code-barres Cote Support Localisation Section Disponibilité 003517 - Périodique Bibliothèque principale Documentaires Disponible Electrochemical impedance study for modeling the anticorrosive performance of coatings based on accelerated tests and outdoor exposures / Franky E. Bedoya in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 5 (09/2016)
[article]
Titre : Electrochemical impedance study for modeling the anticorrosive performance of coatings based on accelerated tests and outdoor exposures Type de document : texte imprimé Auteurs : Franky E. Bedoya, Auteur ; Ángela Bermudez, Auteur ; Juan G. Castano, Auteur ; Félix Echeverría, Auteur ; Jorge A. Calderón, Auteur Année de publication : 2016 Article en page(s) : p. 895-904 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Corrosion
Essais accélérés (technologie)
Prévision, Théorie de la
Revêtements organiques
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, the atmospheric corrosive protection characteristics of four organic coatings were modeled based on the evolution of low-frequency impedance (|Z|ω→0) over time when subjected to accelerated tests and outdoor exposures. Environmental characteristics such as the time of wetness, chloride and sulfate depositions, and ultraviolet radiation were defined as explanatory variables. The results obtained helped to establish a relationship between |Z|ω→0, acquired from electrochemical impedance spectra, and the explanatory variables. An adjustment factor was calculated for each coating against the most aggressive natural exposure, resulting in a good prediction of |Z|ω→0 and the performance of the coatings for other outdoor tests. Note de contenu : - MATERIALS AND METHODS : Accelerated tests - Natural outdoor tests - Accelerated outdoor tests - Atmospheric characterization for outdoor tests - Electrochemical cell parameters for EIS measurements
- THEORETICAL TREATMENT
- RESULTS AND DISCUSSION : Accelerated test predictors - Outdoor test predictors - Estimation of coefficients from the accelerated tests measurements - Prediction of impedance modules for outdoor exposures - Estimation of failure timesDOI : 10.1007/s11998-016-9803-7 En ligne : http://link.springer.com/content/pdf/10.1007%2Fs11998-016-9803-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27128
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Code-barres Cote Support Localisation Section Disponibilité 18316 - Périodique Bibliothèque principale Documentaires Disponible Electrochemical investigation of the epoxy nanocomposites containing MnAl2O4 and CoAl2O4 nanopigments applied on the aluminum alloy 1050 / E. Ghasemi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 1 (01/2016)
[article]
Titre : Electrochemical investigation of the epoxy nanocomposites containing MnAl2O4 and CoAl2O4 nanopigments applied on the aluminum alloy 1050 Type de document : texte imprimé Auteurs : E. Ghasemi, Auteur ; S. Saket, Auteur ; S. Ashhari, Auteur Année de publication : 2016 Article en page(s) : p. 97-114 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aluminium -- Alliages
Anticorrosion
Caractérisation
Electrochimie
Epoxydes
Matériaux hybrides
Nanoparticules
Nanostructures
Pigments inorganiques
Revêtements:Peinture
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : The MnAl2O4 and CoAl2O4 nanopigments were synthesized through solution combustion method. The nanopigments extracts in the 3.5 wt% NaCl solution were prepared. Electrochemical impedance spectroscopy (EIS) and linear polarization (LP) techniques were utilized to investigate the corrosion inhibition properties of the pigments in the solutions containing pigments extracts. The epoxy nanocomposites were prepared and applied on the aluminum specimens. EIS and pull-off measurements were performed to characterize the corrosion protection properties of the epoxy nanocomposites. It was revealed that the MnAl2O4 pigment showed higher corrosion inhibition properties than CoAl2O4 in the solution phase. In addition, MnAl2O4 enhanced the corrosion resistance and decreased the adhesion loss of the epoxy coating on the aluminum substrate significantly. The MnAl2O4 nanopigment improved the corrosion resistance of the epoxy coating through increasing the barrier performance and releasing inhibitive species. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of pigments - Pigments extract preparation - Epoxy nanocomposite preparation - Characterization
- RESULTS AND DISCUSSION : XRD and SEM analyses - Corrosion inhibition evaluation of the Co- and Mn-doped nanopigments - Studying the corrosion inhibition mechanism of the nanopigments - Anticorrosion performance of epoxy nanocomposites - Pull-off adhesion test results - Corrosion protection mechanism of MnAl2O4 nanopigment in the epoxy coatingDOI : 10.1007/s11998-015-9728-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9728-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25380
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Code-barres Cote Support Localisation Section Disponibilité 17819 - Périodique Bibliothèque principale Documentaires Disponible Electrochemical preparation of poly 3-amino-5-hydroxypyrazole on copper and its corrosion protection efficiency in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)
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