Conductive polymers as anticorrosive additive for marine coatings : a review / Umesh Wagh in PAINTINDIA, Vol. LXX, N° 9 (09/2020)  

[article]  inPAINTINDIA > Vol. LXX, N° 9 (09/2020) . - p. 84-95 Titre : Conductive polymers as anticorrosive additive for marine coatings : a review Type de document : texte imprimé Auteurs : Umesh Wagh, Auteur ; Vivek Krishnan, Auteur ; Ashok Kumar, Auteur Année de publication : 2020 Article en page(s) : p. 84-95 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Anticorrosifs Anticorrosion Conducteurs organiques Corrosion Epoxydes Métaux -- Oxydation anodique Métaux -- Revêtements protecteurs Passivité (Chimie) Polyaniline Polythiophènes Revêtements -- Additifs:Peinture -- Additifs Système de libération contrôlée (technologie) Thermogravimétrie Index. décimale : 667.9 Revêtements et enduits Résumé : Protection of metals and alloys against corrosion by using organic coatings is an area of great interest. Thus, the development of new paints attempts to improve the performance increasing their corrosion resistance and extending the fields of application. Within coating technology, there is increasing interest in the development of efficient anticorrosive additives able to replace the conventional inorganic anticorrosive pigments usually added to paints, which may have detrimental effects on both environment and health. A number of recent studies have evidenced that the modification of a paint formulation by the addition of a low concentration of conducting polymer (0.2-0.3%, w/w) increases sign ificantly the protective properties of the coating. Here we focus on the principles of anticorrosive additives based on conducting polymers for marine paints. The article reviews the most important findings achieved in recent studies. The general aim of this work is to set new standards for research and development in the paint industry by focussing on the addition of a conducting polymerto paint formulation without losing its properties and assuring a good performance. Note de contenu : - Basics of corrosion - Introduction to conductive polymers - Conventional paint system for corrosion protection - Conductive polymers (CP) based anticorrosive paints - Mechanism of corrosion protection using conducting polymers - Anodic protection mechanism - Controlled inhibitor release mechanism - Fig. 1 : Electrochemical corrosion showing rusting of plain carbon steel - Fig. 2 : Chemical structure of polythiophene and polyaniline - Fig. 3 : Outline of the redox-reactions that combines the emeraldine form and the leuco forms of polyaniline and their chemical structures - Fig. 4 : TGA curve of epoxy paint with and without corrosion inhibitors - Fig. 5 : Photographs of the painted rectangular test pieces (scale bar: 1 cm): (a) initial sample, (b) and (c) samples without and with conducting polymer, respectively, optical micrographs from the polymeric films (scale bar: 200_m) and scanning electron micrographs (scale bar: 100 _m) - Fig. 6 : Passivation of steel by conducting PANI-based paint coating - Fig. 7 : Controlled inhibitor release mechanism for a metal, M coated by a CP layer such as PANI doped with an ion, A-which acts as a corrosion inhibitor En ligne : https://drive.google.com/file/d/14IhkCrcgpw7YVYEajqQYxADflGg77zRs/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34662 [article]

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