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Title: | DESIGNING A CORROSION RESISTANCE SYSTEM USING MODIFIED GRAPHENE OXIDE-EPOXY MICROCAPSULES FOR ENHANCING THE ADHESION STRENGTH OF THE EPOXY COATINGS |
Authors: | Priyanka D Nalini D |
Keywords: | Organic Coatings Graphene Oxide Urea-formaldehyde Microcapsules Anti-Corrosion Adhesion |
Issue Date: | Aug-2022 |
Publisher: | Elsevier |
Abstract: | New microencapsulated material with advanced corrosion resistance activity and superior adhesion strength on the steel sample was synthesized by in-situ polymerization. In this process, urea-formaldehyde was used as capsule shell material for encapsulating modified graphene oxide. The formation of microcapsules was effectively evidenced by FT-IR, SEM, and TGA-DSC analyses. Initially, graphene oxide was modified by the adsorption of Catharanthus roseus L. (C.R) leaves extract and characterized by FT-IR, SEM, EDX, and DFT studies. GO-C.R and UF-GO-C.R (microcapsules) were separately impregnated into epoxy resin and fabricated on the steel substrates. The anti-corrosion performance of UF-GO-C.R/Epoxy in comparison with neat GO-C.R/Epoxy coated sample was evaluated by electrochemical impedance spectroscopy (EIS) and salt spray test. Results reveal that UF-GO-C.R microcapsules in epoxy matrix showed the protection efficiency of 83.6 % after the immersion period of 7 days in 3.5 % NaCl solution which was relatively higher than those with neat GO-C.R. In addition, the coating loaded with UF-GO-C.R microcapsules showed improvement in the adhesion of epoxy coatings on the steel surface which was evident from the increase in peel strength (290 N) through peel-off adhesion test. |
URI: | https://www.sciencedirect.com/science/article/pii/S2666523922000599?via%3Dihub |
Appears in Collections: | c) 2022-Scopus Article (PDF) |
Files in This Item:
File | Description | Size | Format | |
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DESIGNING A CORROSION RESISTANCE SYSTEM USING MODIFIED GRAPHENE OXIDE-EPOXY MICROCAPSULES FOR ENHANCING THE ADHESION STRENGTH OF THE EPOXY COATINGS.pdf | 14.59 MB | Adobe PDF | View/Open |
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