Abstract
A combination of a series of epoxy coatings filled with octadecylamine (ODA)-modified graphene oxide (mGO) or commercial exfoliated graphite nanoplatelets (xGnP) was developed to boost the anticorrosion performances of mild steel substrates in acidic and NaCl aqueous solutions. The xGnP and mGO were applied successfully as fillers for the preparation of layer by layer (LBL) xGnP or mGO/epoxy coatings, respectively, which were coated on the clean steel surfaces to form LBL-assembled layers. The LBL-assembled xGnP or mGO/epoxy coating-coated steel substrates exhibit excellent anticorrosion performances. The corrosion potentials (Ecorr) of xGnP-1/xGnP-2/3 and mGO-1/mGO-2/3 display at − 193 and − 150 mV, respectively, while Ecorr of the bare steel shows at − 871 mV of immersion in the 3.5 wt% NaCl solution. The most positive Ecorr values are obtained for xGnP-1/2/3 (− 117 mV) and mGO-1/2/3 (− 66 mV), showing the best anticorrosion performances compared to the bare steel (− 404 mV) in 17 wt% HCl solution.
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This work was financially supported by Natural Science Foundation of Henan Province (202300410020) and Key Scientific Research Project of High Education Institutions in Henan Province (24A430032).
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Guo, M., Li, X., Du, J. et al. Enhancement of anticorrosion performance of epoxy coatings with exfoliated graphite nanoplatelets and functionalized graphene. Carbon Lett. 34, 637–645 (2024). https://doi.org/10.1007/s42823-023-00686-x
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DOI: https://doi.org/10.1007/s42823-023-00686-x