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Self-healing and corrosion performance of polyurethane coating containing polyurethane microcapsules / Hanieh Fathi Fathabadi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)
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Titre : Self-healing and corrosion performance of polyurethane coating containing polyurethane microcapsules Type de document : texte imprimé Auteurs : Hanieh Fathi Fathabadi, Auteur ; Mehdi Javidi, Auteur Année de publication : 2021 Article en page(s) : p. 1365-1378 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion
Caractérisation
Encapsulation
Essais d'adhésion
Microcapsules
Polymérisation interfaciale
Polyuréthanes
Revêtement autoréparant
Revêtements organiques
Spectroscopie d'impédance électrochimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : In this study, the self-healing behavior of the polyurethane coating containing polyurethane microcapsules was investigated. Microcapsules, with the average size of 99 µm and shell thickness of 11 µm, were successfully synthesized via the interfacial polymerization technique and were incorporated into the polyurethane coating matrix. The electrochemical impedance spectroscopy and scanning electron microscope were employed to investigate the healing performance and corrosion behavior of the coatings on the carbon steel substrate. The recorded results revealed that artificial scratches were successfully healed and the coating containing 20 wt% microcapsules exhibited the best healing performance (85% healing efficiency) among all the prepared coatings. The self-healing ability of the coatings was verified via scanning electron microscope. After 24 h, the healing efficiency attained a reasonable value of 68% during exposure to test solution. It was found that corrosion resistance and coating adhesion were significantly improved by incorporating the microcapsules into the coating. Note de contenu : - EXPERIMENTAL : Materials - Preparation of microcapsules - SEM investigation - Coatings application - Evaluation of self-healing behavior of the coatings and corrosion performance - Adhesion test
- RESULTS AND DISCUSSION : Characterization of the synthesized microcapsules - Self-healing performance of the coatings - The effect of microcapsule concentration on healing process - Time dependency of the healing process - Corrosion performance of the investigated coating - Adhesion test
- Table 1 : Prepared and coded samples
- Table 2 : The resulted electrochemical data after curve fitting the impedance results for carbon steel samples coated with polyurethane resin containing different concentrations of polyurethane microcapsules in 3.5% NaCl electrolyte
- Table 3 : The resulted electrochemical data after curve fitting the impedance results for the carbon steel samples coated with polyurethane resin containing 20 wt% polyurethane microcapsules and the neat coating without any scratches in 3.5% NaCl electrolyte
- Table 4 The resulted electrochemical data after curve fitting the impedance data for the carbon steel coated with polyurethane resin containing 20 wt% polyurethane microcapsules in 3.5% NaCl electrolyte at different time intervals
- Table 5 The extracted electrochemical data from EIS measurements to evaluate the corrosion performance of the carbon steel coated with polyurethane resin containing 20 wt% polyurethane microcapsules in 3.5% NaCl electrolyte at different time intervalsDOI : https://doi.org/10.1007/s11998-021-00501-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00501-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36439
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 5 (09/2021) . - p. 1365-1378[article]Réservation
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