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Improved 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)
[article]
Titre : Improved corrosion protection of acrylic waterborne coating by doping with microencapsulated corrosion inhibitors Type de document : texte imprimé Auteurs : Jacob Ress, Auteur ; Ulises Martin, Auteur ; M. Bastidas, Auteur Année de publication : 2022 Article en page(s) : p. 39-44 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Acier au carbone
Anticorrosifs
Anticorrosion
Chlorures
Emulsions multiples
Encapsulation
Métaux -- Revêtements protecteurs
Polyacryliques
Revêtements en phase aqueuse:Peinture en phase aqueuse
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : A waterborne acrylic coating doped with pH sensitive colophony microcapsules containing corrosion inhibitors was studied on carbon steel plates. The changes in the physical properties of the coatings were studied. The microcapsule coating specimens maintained more noble E.„ values compared to the control in deionised water and simulated concrete pore solutions with -513 and -531 mVSCE, respectively. Additionally, the microcapsule polarisation results for both pH12.6 and 6.2 electrolyte solutions showed lowerieO values of 1.20 x 10-' and 3.24 x 10-6 A . cm', respectively, compared to the control sample (1.15 x 10-5 and 4.21 x 10-5 A . cm2). Therefore, the microcapsule coating provided more protection from chloride attack on the substrate as well as the deleterious effects of low pH on carbon steel. The electrochemical impedance spectroscopy analysis corroborated the DC polarisation results, showing increased corrosion resistance for the microcapsule coated specimens compared to the control. Moreover, the Rpore and Ra are much higher than the control, indicating the protection of the inhibitors. The Ced, also shows lower values for the microcapsule coating than the control, showing a more protective and less doped double layer. Note de contenu : - Table 1 : The composition of carbon steel speciment (wt%)
- Table 2 : Composition of waterborne acrylic coating (wt%)
- Table 3 : Electrochemical parameters calculated by Tafel fitting from potentiodynamic polarisation for acrylic coating containing microcapsules exposed to 3.5 wt°/0NaCl contaminated environment in DI water (pH 6.8) and SCPS (pH 12.6). The standard deviation
is presented in the parenthesis
- Table 4 : EIS fitting values obtained for acrylic coated control steel panels and MC modified acrylic coated panels exposed to 3.5 wt% NaCI contaminated environment in DI water (pH 6.8) and SCPS (pH 12.6) using the equivalent circuit presented in Figure 8. The standard deviation is presented in the parenthesisEn ligne : https://drive.google.com/file/d/1InjEH6A4EGq-s7P6M0KuLbo8bkkKI446/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36973
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4673 (02/2022) . - p. 39-44[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23211 - Périodique Bibliothèque principale Documentaires Disponible Improvement 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)
[article]
Titre : Improvement of anticorrosive performance of phosphate-based alkyd paints with suitable additives Type de document : texte imprimé Auteurs : G. Blustein, Auteur ; C. Deyà , Auteur ; R. Romagnoli, Auteur ; A. R. di Sarli, Auteur ; Beatriz del Amo, Auteur Année de publication : 2011 Article en page(s) : p. 171-181 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Additifs
Anticorrosifs
Electrochimie
Phosphates
Pigments inorganiques
Revêtements -- Additifs:Peinture -- Additifs
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : The purpose of this investigation was focused on reducing the content of zinc phosphate in anticorrosive paints by means of the incorporation of low quantities of selected soluble corrosion inhibitors. The article describes the anticorrosive behavior of alkyd paints containing reduced levels of zinc phosphate, zinc oxide, and some soluble compounds used as additives (e.g., sodium polyphosphate, sodium phosphate, and sodium benzoate). Anticorrosive solventborne alkyd paints were formulated with a zinc phosphate content of 10% by volume (v/v) with respect to the total pigment concentration. In all cases, the PVC/CPVC (pigment volume concentration/critical pigment volume concentration) ratio was 0.8. Experimental paints, applied on sandblasted SAE 1010 panels, were evaluated by accelerated tests (salt spray cabinet) and electrochemical measurements (electrochemical impedance spectroscopy, EIS). The results show that the additions of small amounts of soluble corrosion inhibitors to low content zinc phosphate paint formulations enhance their performance in a very remarkable way. Perhaps, the most outstanding feature is that the employment of soluble additives allowed the reduction of the zinc phosphate content with concomitant savings. Note de contenu : - EXPERIMENTAL SECTION : Composition manufacture, and application of paints - Anticorrosive performance evaluation of paint through accelerated tests (electrochemical tests)
- RESULTS AND DISCUSSION : Salt spray test - Electrochemical impedance spectroscopy (equivalent circuits).DOI : 10.1007/s11998-010-9289-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-010-9289-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11359
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Code-barres Cote Support Localisation Section Disponibilité 012999 - Périodique Bibliothèque principale Documentaires Disponible Influence 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)
[article]
Titre : Influence of deposition parameters on the behavior of nitro-cobalt-based and Ti-hexafluoride-based pretreatments Type de document : texte imprimé Auteurs : A. Cristoforetti, Auteur ; M. Fedel, Auteur ; F. Deflorian, Auteur ; S. Rossi, Auteur Année de publication : 2022 Article en page(s) : p. 859-873 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
Coil coatings
Essais accélérés (technologie)
Essais de brouillard salin
Galvanisation
Revêtement de conversion
Revêtements:Peinture
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Two different chemical pretreatments for hot-dip galvanized steel, typically used in the coil coating field, were considered comparing their electrochemical behavior (electrochemical impedance spectroscopy (EIS), potentiodynamic curves) after a morphological characterization of the deposited films. The wet and dry adhesion of the following deposited paint is tested employing neutral salt spray chamber test (NSST) and pull-off test. Despite these technologies being widely adopted in industrial plants, the literature lacks some relevant research about the actual improvement in durability, especially in the case of nitro-cobalt based conversion. This paper analyzes the factors affecting the protection provided by the deposited film and varying the principal production parameter, the immersion time in the chemical conversion solution, an optimization study was carried out. The better behavior of the titanium hexafluoride-based artificial conversions, with respect to the nitro-cobalt one, is highlighted. Such treatment analyzed as bare surface gives higher impedance modulus and lower corrosion current density compared to the second one. For both the technologies, the uselessness of longer treatment periods in terms of performance improvement is found. The results obtained from the electrochemical characterization are in accordance with the technological test on the painted samples, such as NSST, where the delamination rate is significantly higher for the substrate treated employing a nitro-cobalt-based bath. Note de contenu : - EXPERIMENTAL METHODS AND MATERIALS
- RESULTS AND DISCUSSION : Morphology and composition - Free corrosion potential trend - Impedance spectra - Potentiodynamic polarization curves - Neutral salt spray chamber test, adhesion of painted samples
- Table 1 : Sample's production parameters and corresponding code
- Table 2 : Comparison between surface and cluster composition by EDXS analysis on T-300 sample
- Table 3 : Numerical data obtained from electrochemical measurements carried out in aerated conditionsDOI : https://doi.org/10.1007/s11998-021-00563-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00563-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38081
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Code-barres Cote Support Localisation Section Disponibilité 23605 - Périodique Bibliothèque principale Documentaires Disponible Influence 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)
[article]
Titre : Influence of impingement flows with sand particles on the barrier properties of organic coatings Type de document : texte imprimé Auteurs : Amin Vedadi, Auteur ; Jordi Estevadeordal, Auteur ; Xinnan Wang, Auteur ; Jiajia Rao, Auteur ; Yechun Wang, Auteur Année de publication : 2023 Article en page(s) : p. 1235-1255 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Contraintes (mécanique)
Dynamique des fluides computationnelle
Eoliennes
Essais de résilience
Essais dynamiques
Flux d'impact
Particules (matières)
Revêtements organiques
Sable
Spectroscopie d'impédance électrochimique
Structures offshoreIndex. décimale : 667.9 Revêtements et enduits Résumé : The installations of offshore wind farms, especially the type with monopile structures, increase the number of suspended particles in the surrounding area. The offshore wind structures are usually coated with several layers of coatings, including a thin layer of organic coating as a topcoat. In this study, we aim to investigate the influence of the stresses on the organic coatings due to the kinetic energy of the suspended sand particles. To accomplish the goal, impingement flow jets with particles were applied on coated steel samples for a week in a lab-scale impingement chamber. The working fluid for the experiments was 3.5 wt% NaCl solution with 1 wt% suspended sand particles. Electrochemical impedance spectroscopy (EIS) was conducted to monitor the degradation of organic coatings while exposed to the impingement flow. Computational fluid dynamics (CFD) modeling was utilized to calculate the magnitude of the applied fluid stresses on the coatings. Thermodynamics of electrochemical reactions and the activation theories were utilized to compare with the electrochemical parameters. It was concluded that for the lowest flow rate (Q1 = 6.31 cm3/s), the added sand particles started to show destructive influence after the first three days of exposure. As the flow rate increased, the destructive influence of sand particles on coating samples appeared earlier at the beginning of the exposure, and the elements of equivalent circuit model showed larger difference between coatings exposed to pure NaCl solution and those exposed to solution with sand particles. For the highest flow rate (Q3 = 18.93 cm3/s), the destructive influence of sand particles was significant, indicating that for the particulate flows with the velocity of 1 m/s, which is the regular velocity of the underwater zone in shallow sea regions (with a depth of 30 m), the momentum impact of the sand particles plays a vital role in the degradation of the organic coatings. Note de contenu : - EXPERIMENTS :
- Samples and fluid preparation
- Electrochemical spectroscopy measurement and topography characterization
- Experimental set-up
- CFD modeling of the impingement flow in the chamber
- RESULTS AND DISCUSSION :
- Analysis of the applied fluid’s stresses and particle impacts based on CFD results
- EIS results of the particulate and non-particulate impingement flows and their respective equivalent circuit model
- Equivalent circuit modeling, and comparison between the circuit elements of the particulate and non-particulate flow
- Electrochemical parameters of the particulate and non-particulate flows
- Table 1 : The thickness and average coating capacitance before and after exposure to sand particulate and non-particulate 3.5 wt% NaCl solution at different flow rate, as well as the water uptake and volume fraction of water in the coatings after a week of exposureDOI : https://doi.org/10.1007/s11998-023-00739-2 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00739-2.pdf?pdf=button% [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39713
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Code-barres Cote Support Localisation Section Disponibilité 24153 - Périodique Bibliothèque principale Documentaires Disponible Influence 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)
[article]
Titre : Influence of pH in the synthesis of ferric tannate pigment for application in antifouling coatings Type de document : texte imprimé Auteurs : Rafael S. Peres, Auteur ; Ariane V. Zmozinski, Auteur ; Juan A. Moreno-MartÃnez, Auteur ; Elaine Armelin, Auteur ; Carlos Alemán, Auteur ; Carlos A. Ferreira, Auteur Année de publication : 2017 Article en page(s) : p. 945-953 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Essais dynamiques
Pigments inorganiques
Revêtements antisalissures:Peinture antisalissures
Solubilité
Spectroscopie d'impédance électrochimique
Tanins
Test d'immersionIndex. décimale : 667.9 Revêtements et enduits Résumé : Ferric tannate was synthesized at pH 4 and pH 7 (FT4 and FT7, respectively) as a new class of environmentally friendly antifouling pigments. The solubility of both pigments was evaluated by gravimetric tests, showing that FT4 is more soluble than FT7. A mixture of rosin/acrylic resin (9:1 w/w) was sufficient to form an antifouling coating due to improved matrix properties. Electrochemical impedance spectroscopy (EIS) measurements were used to determine the apparent water coefficient of diffusion (D) and coating behavior. The D in the coating formulated with FT4 exhibited better values than that obtained with FT7. EIS results showed that both coatings present Fickian behavior at the initial stages of immersion, while flat Nyquist plots revealed penetration of water in the films. The physicochemical characteristics of FT4 pigment were determined by thermogravimetry and Fourier transform infrared. Immersion tests in the Mediterranean Sea demonstrated the excellent efficacy of the FT4-containing coating against marine fouling after six months of immersion. Note de contenu : - EXPERIMENTAL : Ferric tannate pigment preparation - Antifouling coating preparation - Solubility tests - Characterization
- RESULTS AND DISCUSSION : Solubility - EIS measurements - Characterization of the FT4 pigment - Immersion testsDOI : 10.1007/s11998-016-9904-3 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9904-3.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28936
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Code-barres Cote Support Localisation Section Disponibilité 19194 - Périodique Bibliothèque principale Documentaires Disponible Influence de la protection cathodique sur le comportement électrochimique des couches de corrosion d'acier au carbone in MATERIAUX & TECHNIQUES, Vol. 101, N° 5/6 (2013)
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PermalinkInvestigating changes in electrochemical properties when nano-silica is incorporated into an acrylic-based polyurethane clearcoat / Hamed Dastmalchian in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 2 (03/2012)
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PermalinkInvestigation of the mechanical and thermal fatigue properties of hybrid sol–gel coatings applied to AA2024 substrates / Garrett Melia in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 6 (11/2016)
PermalinkIron as an alternative drier for curing of high-solid alkyd coatings / Barbara Pirš in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 6 (11/2015)
PermalinkJuniperus Phoenicea essential oil as green corrosion inhibitor for mild steel in molar hydrochloric acid / Kentaro Takeyama in MATERIAUX & TECHNIQUES, Vol. 104, N° 6/7 (2016)
PermalinkLow-cost fabrication and physicochemical characterization of ZnFe2O4 nanoparticles as an efficient multifunctional inorganic pigment / Mostafa A. Sayed in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)
PermalinkMethod for corrosion inhibitor mechanism studies in epoxy coated aluminum / Richard C. MacQueen in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 68, N° 857 (06/1996)
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PermalinkPermalinkMorphology and corrosion resistance of Cr(III)-based conversion treatments for electrogalvanized steel / C. R. Tomachuk in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 7, N° 4 (07/2010)
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PermalinkOptimization of phosphate coating properties on steel sheet for superior paint performance / Nitu Rani in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 5 (09/2012)
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PermalinkPeintures et vernis. Spectroscopie d'impédance électrochimique (SIE) sur des éprouvettes revêtues de haute impédance - Partie 4 : Exemples de spectres d'éprouvettes revêtues de polymères - Norme internationale ISO 16773-4 / International Organization for Standardization (Genève, Suisse) / Geneve [Switzerland] : International Organization for Standardization (ISO) (2009)
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