Accueil
Catégories
> Spectroscopie d'impédance électrochimique
Spectroscopie d'impédance électrochimiqueVoir aussi |
Ajouter le résultat dans votre panier Affiner la recherche
Etendre la recherche sur niveau(x) vers le bas
Evaluation of the anticorrosive behavior of epoxy-Nb2O5 paint in high temperatures submitted to the environment with sulfuric acid / Maria Eduarda Dias Serenario in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)
[article]
Titre : Evaluation of the anticorrosive behavior of epoxy-Nb2O5 paint in high temperatures submitted to the environment with sulfuric acid Type de document : texte imprimé Auteurs : Maria Eduarda Dias Serenario, Auteur ; Bernardo Augusto Farah Santos, Auteur ; Luiz Roberto Martins de Miranda, Auteur ; Alysson Helton Santos Bueno, Auteur Année de publication : 2020 Article en page(s) : p. 1321–1329 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Epoxydes
Hautes températures
Pentoxyde de niobium
Revêtements -- Analyse
Revêtements -- Détérioration
Revêtements:Peinture
Spectroscopie d'impédance électrochimique
Sulfurique, Acide
Test d'immersionIndex. décimale : 667.9 Revêtements et enduits Résumé : The aim of this study was to produce graphene oxide (GO) coatings on biodegradable AZ31B magnesium (Mg) alloy. GO was synthesized by improved Hummers’ method, and a suspension was prepared in deionized water by ultrasonication. GO coatings were developed on AZ31B Mg alloy by electrophoretic deposition (EPD). The EPD parameters, such as voltage and time, were optimized to obtain uniform GO coatings. Characterization was carried out using Fourier transform infrared spectroscopy, X-ray diffraction, atomic force microscopy (AFM), and scanning electron microscopy. GO was found to have a thickness of approximately 0.7–1 nm as determined by AFM. Electrochemical behavior of coatings was evaluated by Tafel analysis and electrochemical impedance spectroscopy (EIS) in Ringer’s lactate solution. GO coatings improved the corrosion resistance of the AZ31B Mg alloy by 16× in Ringer’s lactate solution as compared to bare Mg alloy. Note de contenu : - EXPERIMENTAL : Materials - Immersion tests - Assessment of degradation of coatings - Mechanical tests - Electrochemical impedance spectroscopy (EIS)
- RESULTS AND DISCUSSION : Coating degradation analysis - Mechanical properties of coatings - Electrochemical impedance spectroscopy (EIS)DOI : https://doi.org/10.1007/s11998-020-00354-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00354-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34576
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 17, N° 5 (09/2020) . - p. 1321–1329[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 22303 - Périodique Bibliothèque principale Documentaires Disponible Evaluation of the corrosion protection of defective polyaniline/epoxy coating by localized electrochemical impedance spectroscopy / Yingjun Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 4 (07/2015)
[article]
Titre : Evaluation of the corrosion protection of defective polyaniline/epoxy coating by localized electrochemical impedance spectroscopy Type de document : texte imprimé Auteurs : Yingjun Zhang, Auteur ; Yawei Shao, Auteur ; Guozhe Meng, Auteur ; Tao Zhang, Auteur ; Fuhui Wang, Auteur Année de publication : 2015 Article en page(s) : p. 777-785 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs
Anticorrosion
Epoxydes
Magnésium -- Alliages
Polyaniline
Revêtements protecteurs
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Defective epoxy varnish and hydrofluoric acid-doped polyaniline/epoxy (PANI-HF/EP) coatings were coated on the surface of an AZ91D magnesium alloy. The corrosion protection of the defective coatings was evaluated in 0.05 M NaCl by localized electrochemical impedance spectroscopy. Then, the surface of AZ91D magnesium alloy beneath the coating was analyzed by scanning electron microscopy and energy dispersive X-ray spectroscopy. The results indicated that the defective epoxy varnish coating could not protect the magnesium alloy because it only served as an electrolyte barrier. By contrast, the PANI-HF/EP coating served not only as an electrolyte barrier, but also facilitated the formation of a protective layer by redox processes. Therefore, the defective PANI-HF/EP coating could protect magnesium alloy from corrosion. Note de contenu : - EXPERIMENTAL : Materials and sample preparation - Local electrochemical impedance measurements - SEM and EDS
- RESULTS : LEIS measurements - Surface morphology analysis - Surface component analysis
- DISCUSSION : Corrosion protection of the defective epoxy varnish coating - Corrosion protection of the defective PANI-HF/EP coatingDOI : 10.1007/s11998-015-9679-y En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9679-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24412
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 4 (07/2015) . - p. 777-785[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 17366 - Périodique Bibliothèque principale Documentaires Disponible Evaluation of the corrosion protection performance of epoxy coatings containing Mg nanoparticle on carbon steel in 0.1 M NaCl solution by SECM and EIS techniques / Joseph Raj Xavier in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 2 (03/2017)
[article]
Titre : Evaluation of the corrosion protection performance of epoxy coatings containing Mg nanoparticle on carbon steel in 0.1 M NaCl solution by SECM and EIS techniques Type de document : texte imprimé Auteurs : Joseph Raj Xavier, Auteur ; Toshiyasu Nishimura, Auteur Année de publication : 2017 Article en page(s) : p. 395-406 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acier au carbone
Anticorrosifs
Anticorrosion
Epoxydes
MagnésiumLe magnésium est l'élément chimique de numéro atomique 12, de symbole Mg.
Le magnésium est un métal alcalino-terreux. Il s’agit du neuvième élément le plus abondant de l'univers
. Il est le produit, dans de grandes étoiles vieillissantes, de l'addition séquentielle de trois noyaux d'hélium à un noyau carbo. Lorsque de telles étoiles explosent en tant que supernovas, une grande partie du magnésium est expulsé dans le milieu interstellaire où il peut se recycler dans de nouveaux systèmes stellaires. Le magnésium est le huitième élément le plus abondant de la croûte terrestreet le quatrième élément le plus commun de la Terre (après le fer, l'oxygène et le silicium), constituant 13 % de la masse de la planète et une grande partie du manteau de la planète. C'est le troisième élément le plus abondant dissous dans l'eau de mer, après le sodium et le chlore.
Les atomes de magnésium existent dans la nature uniquement sous forme de combinaisons avec d'autres éléments, où il présente invariablement l'état d'oxydation +2. L'élément pur est produit artificiellement par réduction ou électrolyse. Il est hautement réactif en poudre et en copeaux mais, laissé à l'air libre, il se revêt rapidement d'une mince couche d'oxyde étanche réduisant sa réactivité (passivation par oxydation). Le métal pur brûle aisément sous certaines conditions (en produisant une lumière brillante, blanche, éblouissante caractéristique). En mécanique il est utilisé principalement comme composant dans les alliages d'aluminium-magnésium (parfois appelés magnalium). Le magnésium est moins dense que l'aluminium et l'alliage est apprécié pour sa légèreté et sa résistance plus grande (mécanique et chimique). (Wikipedia)
Métaux -- Revêtements protecteurs
Microscopie électrochimique
Nanoparticules
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : The effect of corrosion protection performance of epoxy coatings containing magnesium (Mg) nanoparticles on carbon steel was analyzed using scanning electrochemical microscopy (SECM) and electrochemical impedance spectroscopy (EIS). Localized measurements such as oxygen consumption and iron dissolution were observed using SECM in 0.1 M NaCl in the epoxy-coated sample. Line profile and topographic image analysis were measured by applying −0.70 and +0.60 V vs the Ag/AgCl/saturated KCl reference electrode as the tip potential for the cathodic and anodic reactions, respectively. The tip current at −0.70 V for the epoxy-coated sample with Mg nanoparticles decreased rapidly, which is due to cathodic reduction in dissolved oxygen. The EIS measurements were conducted in 0.1 M NaCl after wet and dry cyclic corrosion test. The increase in the film resistance (Rf) and charge transfer resistance (Rct) values was confirmed by the addition of Mg nanoparticles in the epoxy coating. Scanning electron microscope/energy-dispersive X-ray spectroscope analysis showed that Mg was enriched in corrosion products at a scratched area of the coated steel after corrosion testing. Focused ion beam–transmission electron microscope analysis confirmed the presence of the nanoscale oxide layer of Mg in the rust of the steel, which had a beneficial effect on the corrosion resistance of coated steel by forming protective corrosion products in the wet/dry cyclic test. Note de contenu : - EXPERIMENTAL PROCEDURE : Preparation of the sample - Preparation of coatings - Scanning electrochemical spectroscopy (SECM) measurements - Electrochemical impedance spectroscopy measurement - Surface characterization
- RESULTS AND DISCUSSION : Scanning electrochemical microscopy imaging (SECM) analysis - Scanning electrochemical microscopy line scan (SECM) analysis - Electrochemical impedance spectroscopy (EIS) measurements - Surface characterizationDOI : 10.1007/s11998-016-9856-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9856-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28154
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 2 (03/2017) . - p. 395-406[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 18781 - Périodique Bibliothèque principale Documentaires Disponible Evaluation of the effects of surface treatments on the cathodic delamination and anticorrosion performance of an epoxy-nanocomposite on steel substrate / Bahram Ramezanzadeh in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 1 (01/2013)
[article]
Titre : Evaluation of the effects of surface treatments on the cathodic delamination and anticorrosion performance of an epoxy-nanocomposite on steel substrate Type de document : texte imprimé Auteurs : Bahram Ramezanzadeh, Auteur ; M. M. Attar, Auteur Année de publication : 2013 Article en page(s) : p. 47-55 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.
Anticorrosion
Décollement cathodique (revêtement)
Délaminage
Epoxydes
Matériaux hybrides
Métaux -- Surfaces
Microscopie électronique à balayage
Revêtements
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.6 Peintures Résumé : The St-37 type steel substrates were pretreated with Cr(VI) and Cr(III) conversion coatings where the latter was then post-treated with Co(II) and Ni(II) chemical treatments. The epoxy coatings containing 3.5 wt% nano-sized ZnO particles were applied over the chemically treated steel samples. The corrosion resistance of the samples was studied by a DC polarization technique. A scanning electron microscope (SEM) was utilized to investigate the morphology of the pretreated and post-treated samples. Electrochemical impedance spectroscopy (EIS) was utilized to investigate the corrosion resistance of the epoxy nanocomposites for different immersion times in 3.5 wt% NaCl solution. The adhesion strengths of the coatings were measured before and after 120 days of immersion in the corrosive electrolyte using a pull-off test. The cathodic delamination (CD) of the painted samples was also investigated. Results showed that conversion coatings can significantly increase the corrosion resistance and adhesion strength of the epoxy coating on the steel, and also reduce the rate of CD in comparison with an untreated sample. The adhesion strength and corrosion resistance of the epoxy coating on the Cr(III) pretreated samples were significantly greater than on the Cr(VI) sample. The increase in adhesion strength and corrosion resistance was more pronounced on the samples that were post-treated with Co(II) and Ni(II) chemical treatments. The cathodic disbonded areas of the Cr(III)–Co(II) and Cr(III)–Ni(II) post-treated samples were significantly lower than the Cr(III) and Cr(VI) pretreated samples. Results showed that Cr(III)-based conversion coatings can improve the anticorrosion performance and reduce CD compared with those with Cr(VI). Note de contenu : - EXPERIMENTAL : Materials - Analytical techniques
- RESULTS AND DISCUSSION : Adhesion measurement - Electrochemical properties - Cathodic disbondment of epoxy nanocomposite on the pretreated samplesDOI : 10.1007/s11998-012-9426-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9426-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17471
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 1 (01/2013) . - p. 47-55[article]Réservation
Réserver ce document
Exemplaires (2)
Code-barres Cote Support Localisation Section Disponibilité 14636 - Périodique Bibliothèque principale Documentaires Disponible 15124 - Périodique Bibliothèque principale Documentaires Disponible Experiment and model validation of water concentration jump of a composite coating on 2024 Al alloy / X. Yuan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 4 (07/2015)
[article]
Titre : Experiment and model validation of water concentration jump of a composite coating on 2024 Al alloy Type de document : texte imprimé Auteurs : X. Yuan, Auteur ; Z. F. Yue, Auteur ; X. Chen, Auteur ; S. F. Wen, Auteur ; L. Li, Auteur ; T. Feng, Auteur Année de publication : 2015 Article en page(s) : p. 787-791 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Copolymère silicone époxy
Couches minces
Revêtements protecteurs
Silanes
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Water diffusion in a composite coating on 2024 Al alloy was experimentally studied using electrochemical impedance spectroscopy (EIS). The composite coating contained an inner silane film and an outer silicone-epoxy layer. The measured value of water diffusion coefficient of the composite coating by the EIS method was compared to the value predicted using a mathematical model. The results indicated the non-continuity of water concentration at the interface of silane film and silicone-epoxy layer. Considering water concentration jump on the silane film/silicone-epoxy boundary, the diffusion coefficient of the composite coating obtained by validation model was similar to that obtained from the experimental method. Note de contenu : - EXPERIMENT DETAILS : Sample preparation - EIS measurements and data analysis
- RESULTS AND DISCUSSION : Water diffusion behavior in the composite coating on Al alloy - The validation model of the water concentration jump in the composite coatingDOI : 10.1007/s11998-015-9666-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9666-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24413
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 4 (07/2015) . - p. 787-791[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 17366 - Périodique Bibliothèque principale Documentaires Disponible Exploration of high corrosion resistance property of less hazardous pyrazolidine-based benzoxazines in comparison with bisphenol-F derivatives / M. Manoj in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 4 (07/2020)
PermalinkPermalinkExploring electrochemical impedance spectroscopy : Part 2 / Charlie Hegedus in COATINGS TECH, Vol. 18, N° 10 (10/2021)
PermalinkFormulation and characterization of hybrid polymeric/ZnO nanocomposite coatings with remarkable anti-corrosion and hydrophobic characteristics / Sh. Ammar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 5 (09/2016)
PermalinkFormulation and study of corrosion prevention behavior of epoxy cerium nitrate-montmorillonite nanocomposite coated carbon steel / E. Darmiani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 4 (07/2013)
PermalinkHigh temperature heat resistant and electrochemical corrosion behaviour of powder coating of automotive exhaust muffler / Preeti Kum in PAINTINDIA, Vol. LXIII, N° 9 (09/2013)
PermalinkHybrid epoxy-SiO2/GO nanosheets anti-corrosive coating for aeronautic aluminum Al6061-T5 / Jevet E. D. López-Campos in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 21, N° 2 (03/2024)
PermalinkHyperbranched polyurethane based high-solid protective coating for marine application / R. Baloji Naik in PAINTINDIA, Vol. LXVIII, N° 12 (12/2018)
PermalinkImpact of hybrid self-assembled nanophase particle-based sol–gel coatings on the localized corrosion behavior of modified 9Cr–1Mo steel in chloride medium / S. Ramya in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)
PermalinkImpedance sensor for the early failure diagnosis of organic coatings / Guangyi Cai in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 6 (11/2018)
PermalinkImproved corrosion protection of acrylic waterborne coating by doping with microencapsulated corrosion inhibitors / Jacob Ress in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 212, N° 4673 (02/2022)
PermalinkImprovement of anticorrosive performance of phosphate-based alkyd paints with suitable additives / G. Blustein in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 2 (03/2011)
PermalinkInfluence of deposition parameters on the behavior of nitro-cobalt-based and Ti-hexafluoride-based pretreatments / A. Cristoforetti in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 3 (05/2022)
PermalinkInfluence of impingement flows with sand particles on the barrier properties of organic coatings / Amin Vedadi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 4 (07/2023)
PermalinkInfluence of pH in the synthesis of ferric tannate pigment for application in antifouling coatings / Rafael S. Peres in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 4 (07/2017)
Permalink