Electrochemical, spectroscopic and microscopic investigation of PEDOT coated nickel plate from aqueous micellar solutions and its anti-corrosion performances / Z. Aouzal in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 3 (05/2023) . - p. 1053-1068 Titre : Electrochemical, spectroscopic and microscopic investigation of PEDOT coated nickel plate from aqueous micellar solutions and its anti-corrosion performances Type de document : texte imprimé Auteurs : Z. Aouzal, Auteur ; M. Bouabdallaoui, Auteur ; A. El Guerraf, Auteur ; S. Ben Jadi, Auteur ; M. Bazzaoui, Auteur ; R. Wang, Auteur ; E. A. Bazzaoui, Auteur Année de publication : 2023 Article en page(s) : p. 1053-1068 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse spectrale Anticorrosifs Anticorrosion Caractérisation Electrochimie Electrode de nickel Electropolymérisation Essais de résilience Microscopie Poly(3,4-éthylènedioxythiophène) Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Poly(3,4-ethylenedioxythiophene) (PEDOT) was electrosynthesized on nickel electrodes from aqueous micellar solutions of sodium dodecylbenzenesulfonate (SDBS) containing sodium saccharin or sodium perchlorate as supporting electrolytes. The choice of the aqueous medium for the preparation of PEDOT is mainly dictated by its relevant interest on the economic and ecological fronts. The electrodeposition of the organic coating was achieved using cyclic voltammetry, chronoamperometry and chronopotentiometry. This latter electrochemical method proved to be the most suited to the preparation of homogeneous and adherent PEDOT films. Elsewhere, the presence of SDBS micelles in the electrolytic medium led to an improvement of the monomer solubility and a notable decrease in its oxidation potential. Furthermore, spectroscopic and microscopic characterization techniques revealed regular and compact nodule-like structure of the coating and proved the increase in its doping rate when increasing the electrosynthesis current density. On the other hand, in order to discuss the potential application of the prepared conducting polymer as protective layer against corrosion, several electrochemical tests were performed, using open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS) methods. OCP curves have shown a slight increase in the potential toward more positive values, while the EIS measurements have given a 90° capacitive line indicating the pure capacitive behavior of the polymeric system and have proven the presence of a fast charge transfer at the metal/polymer and polymer/solution interfaces. Note de contenu : - EXPERIMENTAL : Chemicals - Electrochemical apparatus - Characterization techniques - RESULTS AND DISCUSSION : Preparation of the polymeric coating - Characterization of PEDOT films - Corrosion tests DOI : https://doi.org/10.1007/s11998-022-00724-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00724-9.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39447 [article]

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