| Titre : |
Improving anticorrosion performance of epoxy coating by hybrids of rGO and g-C3N4 nanosheets |
| Type de document : |
texte imprimé |
| Auteurs : |
Zhuang Liu, Auteur ; Rongtao Zhu, Auteur ; Xinxi Zhang, Auteur ; Haiyang Zhu, Auteur |
| Année de publication : |
2022 |
| Article en page(s) : |
p. 1219-1232 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Anticorrosifs
Anticorrosion
Electrochimie
Epoxydes
Nanoparticules
Nitrure de carbone graphitique
Oxyde de graphène
Revêtements en phase aqueuse -- Additifs
Revêtements organiques
Revêtements protecteurs
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Applications of reduced graphene oxide (rGO) in epoxy (EP) anticorrosion coatings are hindered by its poor dispersibility and galvanic corrosion hazard with the metal matrix. With an excellent water dispersibility, the acid-treated g-C3N4 nanosheets (CNNS) can be physically combined with rGO through ultrasonic treatment so as to enhance the dispersion of rGO in waterborne epoxy. The structure and morphology of the new hybrids prepared by this simple ultrasonic treatment were characterized through FTIR, Raman, XRD, XPS, and TEM. The results show that the best anticorrosion performance of the coating is achieved in 0.5 M sulfuric acid when the mass ratio of CNNS and rGO in the hybrid is 1:5. Compared with the case of pure EP coating, the corrosion current density of the new hybrid decreases by one order of magnitude, and electrochemical impedance increases by nearly two orders of magnitude. The new CNNS@rGO hybrid prepared by a simple ultrasonic method has broad prospects in the field of waterborne epoxy resin anticorrosive coatings. |
| Note de contenu : |
- EXPERIMENTAL METHOD : Materials - Preparation of CNNS and CNNS@rGO hybrid - Preparation of CNNS@rGO nanocomposite coating - Instruments and characterization
- RESULTS AND DISCUSSION : Dispersibility of CNNS and rGO hybrids with different mass ratios - Chemical composition and microstructure - Coating interface state - EIS study of coatings in 0.5 M H2SO4 solution - Corrosion-resistant mechanism of the coatings
- Table 1 : Detailed proportion of the composite coating
- Table 2 : The fitted electrochemical parameters extracted from EIS experimental data
- Table 3 : Electrochemical parameters obtained from the fitted sample polarization curve data |
| DOI : |
https://doi.org/10.1007/s11998-021-00603-9 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-021-00603-9.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38049 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 4 (07/2022) . - p. 1219-1232
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Improving anticorrosion performance of epoxy coating by hybrids of rGO and g-C3N4 nanosheets in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 4 (07/2022)
