Polyaniline encapsulated a-zirconium phosphate nanosheet for enforcing anticorrosion performance of epoxy coating / Yue Situ in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 4 (07/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 4 (07/2021) . - p. 999-1012 Titre : Polyaniline encapsulated a-zirconium phosphate nanosheet for enforcing anticorrosion performance of epoxy coating Type de document : texte imprimé Auteurs : Yue Situ, Auteur ; Yanlin Guo, Auteur ; Weiwei Ji, Auteur ; Defei Liu, Auteur ; Dan Wei, Auteur ; Hong Huang, Auteur Année de publication : 2021 Article en page(s) : p. 999-1012 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Caractérisation Electrochimie Encapsulation Epoxydes Humidité -- Absorption:Eau -- Absorption Nanoparticules Phosphate de zirconium Polyacrylonitrile Polymérisation par oxydation Revêtements organiques Revêtements protecteurs Index. décimale : 667.9 Revêtements et enduits Résumé : Polyaniline (PANI) encapsulated α-zirconium phosphate (α-ZrP) nanocomposites (PANI/α-ZrP) were prepared by in situ oxidative polymerization and used as anticorrosive filler in epoxy coatings. Water absorption test and electrochemical measurements in 3.5 wt.% NaCl solution were conducted to assess the barrier properties and anticorrosion performances of different coating systems. PANI/α-ZrP composite epoxy coating showed remarkably enhanced corrosion resistance comparing to neat epoxy coating because of “maze effect” from α-ZrP and “passivation effect” from PANI. The α-ZrP nanosheets could be completely encapsulated by PANI with appropriate PANI/α-ZrP mass ratio, and the resulting nanocomposite exhibited optimal corrosion protection properties. Note de contenu : - EXPERIMENTAL : Materials and sample pretreatment - Synthesis of a-zirconium phosphate (a-ZrP) - Synthesis of polyaniline/a-zirconium phosphate (PANI/a-ZrP) nanocomposite - Fabrication of coating- Characterizations of nanocomposite and coating - Water absorption and anticorrosion performance test - Characterization of substrate after being corroded - RESULTS AND DISCUSSION : Characterization of coating Anticorrosive performance of coatings - Table 1 : Equivalent electrical circuit models fitted for all coating systems at different immersion times - Table 2 : Electrochemical parameters fitted from equivalent circuit - Table 3 : Electrochemical parameters of all coating systems after 16 days of immersion in 3.5 wt.% NaCl solution DOI : https://doi.org/10.1007/s11998-021-00452-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00452-y.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36208 [article]

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