Conducting polymers for corrosion protection : a review / Pravin P. Deshpande in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 4 (07/2014)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 4 (07/2014) . - p. 473-494 Titre : Conducting polymers for corrosion protection : a review Type de document : texte imprimé Auteurs : Pravin P. Deshpande, Auteur ; Niteen G. Jadhav, Auteur ; Victoria J. Gelling, Auteur ; Dimitra Sazou, Auteur Année de publication : 2014 Article en page(s) : p. 473-494 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion Conducteurs organiques Pigments Polyaniline Polypyrroles Polythiophènes Revêtements multicouches Surfaces (technologie) Index. décimale : 667.9 Revêtements et enduits Résumé : Conducting polymers (CPs) such as polyaniline (PANI), polypyrrole (PPy), and polythiophene (PTh) are used for the corrosion protection of metals and metal alloys. Several groups have reported diverse views about the corrosion protection by CPs and hence various mechanisms have been suggested to explain anticorrosion properties of CPs. These include anodic protection, controlled inhibitor release as well as barrier protection mechanisms. Different approaches have been developed for the use of CPs in protective coatings (dopants, composites, blends). A judicious choice of synthesis parameters leads to an improvement in the anticorrosion properties of the coatings prepared by CPs for metals and their alloys. This article is prepared as a review of the application of CPs for corrosion protection of metal alloys. Note de contenu : - CORROSION BASICS : Thermodynamics of corrosion - COATINGS BASICS : Zinc-rich coatings - Impervious or barrier coatings - Inhibitive coatings - CONDUCTING POLYMERS IN COATINGS : Polyaniline - Polypyrolle - Polythiophene - CORROSION PROTECTION MECHANISMS OF CONDUCTING POLYMERS : Anodic protection mechanims : thermodynamics of passivation and the role of PANI - Controlled inhibitor release mechanism - RECENTS DEVELOPMENTS : Copolymers of CPs - Multilayers of CPs - Doped CPs for corrosion protection - Nanostrucutre CPs - Composites and nanocomposites of CPs DOI : 10.1007/s11998-014-9586-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9586-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21710 [article]

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Effects of conductive polymers (type and concentration) in coatings with zinc particles of different shapes / M. Kohl in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 4 (07/2019) . - p. 949-962 Titre : Effects of conductive polymers (type and concentration) in coatings with zinc particles of different shapes Type de document : texte imprimé Auteurs : M. Kohl, Auteur ; A. Kalendova, Auteur ; Pravin P. Deshpande, Auteur ; E. Schmidova, Auteur Année de publication : 2019 Article en page(s) : p. 949-962 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Anticorrosifs Anticorrosion Benzoates Un benzoate est un sel de l'acide benzoïque (C6H5COOH ou C7H6O2) qui est un acide carboxylique aromatique dérivé du benzène. Les benzoates sont notamment utilisés dans l'industrie alimentaire comme additifs : - Le benzoate de sodium (Na+ + C6H5COO-), référencé en Europe sous le code « E211 » - Le benzoate de potassium (K+ + C6H5COO-), référencé en Europe sous le code « E212 » - Le benzoate de calcium (Ca2+ + (C6H5COO-)2), référencé en Europe sous le code « E213 » Composés lamellaires Conducteurs organiques Essais accélérés (technologie) Formulation (Génie chimique) Particules (matières) Polyaniline Poudres métalliques Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Revêtements organiques Zinc Index. décimale : 667.9 Revêtements et enduits Résumé : The objective of this work was to compare the anticorrosion effects of organic coatings containing zinc metal consisting of either lamellar particles or isometric particles and to reduce the zinc metal content of the coatings while preserving their high anticorrosion efficiency. The optimization and Zn metal content reduction can be achieved using zinc with a lamellar particle shape and application of conductive polymers. Conductive polymers are expected to enhance the electrochemical effect of zinc metal in paints. Organic coatings with lamellar zinc particles also exhibit better mechanical properties. Optimization of the amount of zinc lamellar particles could promote a wider use of this material in anticorrosion paints. The conductive polymers used in this work included polyaniline phosphate, polyaniline benzoate, and carbonized polyaniline. A solvent-based epoxy–ester resin served as the binder. Model paints consisting of this resin and containing different concentrations of polyaniline phosphate, polyaniline benzoate, and carbonized polyaniline were prepared. The paints were tested at the critical pigment volume concentration (CPVC) of Zn dust and at lower Zn dust concentrations, specifically 2% below the CPVC. The paints containing combinations of zinc and a conductive polymer contained the sum of the pigments just below the CPVC of the zinc dust species used. This implies a level of 39% of (PVCZn-lam) for the systems with lamellar zinc and a level of 61% of (PVCZn–sf) for the systems with spherical zinc. The pigment volume concentration (PVC) of the conductive polymers in the zinc-containing paints was (based on results obtained previously) 1%, 5%, and 10% in the systems with lamellar zinc and 1%, 5%, 10%, and 15% in the systems with spherical zinc. The organic coatings were subjected to accelerated cyclic corrosion tests and electrochemical measurements. The sample containing polyaniline carbonate (PVC = 1%) and spherical zinc exhibited a significantly lower corrosion rate as compared to that of uncoated steel. Note de contenu : - EXPERIMENTAL PART : Synthesis of conductive polymers - Pigment parameter determination - Specification of the binder for coatings - Formulation and preparation of the organic coatings - Mechanical properties of the paints - Corrosion test procedures - Potentiodynamic polarization studies - RESULTS AND DISCUSSION : Pigment specification - Evaluation of accelerated corrosion tests - Potentiodynamic polarization studies - Results of adhesion properties of the protective organic coatings - Characterizing the organic coating composition - Summary of the results of the adhesion properties and accelerated corrosion tests DOI : 10.1007/s11998-018-00169-z En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-00169-z.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32852 [article]

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