The influence of graphene oxide functionalized with 3-aminopropyl triethoxysilane on the corrosion protection performance of epoxy coatings
DOI:
https://doi.org/10.54939/1859-1043.j.mst.110.2026.100-108Keywords:
GO; APTES; Coating; Anticorrosive.Abstract
This study reports the synthesis and characterization of graphene oxide functionalized with 3-aminopropyl triethoxysilane (GO-APTES) to enhance its dispersion within an epoxy resin for advanced anticorrosion coating applications. The structural morphology of the material was characterized using Fourier-transform infrared spectroscopy (FTIR), field-emission scanning electron microscopy (FE-SEM), and energy-dispersive X-ray spectroscopy (EDX). The anticorrosive performance of the GO-APTES/epoxy nanocomposite coating was evaluated using electrochemical impedance spectroscopy (EIS). The epoxy coating incorporating GO-APTES exhibited outstanding corrosion resistance, effectively protecting the metal substrate for up to 60 days of immersion in a 3.5% NaCl solution. The results indicate that the silane-functionalized graphene oxide not only achieves excellent dispersion within the epoxy matrix but also contributes to forming a compact and uniform barrier layer that significantly inhibits the diffusion of corrosive media into the substrate. In particular, the GO-APTES/EP coating demonstrated a high corrosion protection efficiency of 95.61% on CT3 steel, further confirming the remarkable barrier performance of the modified system.
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