Abstract
Recently, graphene has gained increasing interest in numerous fields of application and, in particular, it has been used as a nanofiller in the preparation of polymeric composites to improve their mechanical and transport properties. However, the effect of graphene as a potential additive for anticorrosive organic coatings is not widely studied. In this work, low levels of graphene nanosheets, 0.5 and 1 wt%, were added to an additive-free waterborne epoxy resin applied to Al2024-T3 aluminum alloy samples. The presence of graphene did not affect the polymerization process of the resin and the adhesion at coating/substrate interface, as demonstrated by experimental results, while showing a slight effect on coatings wettability. Electrochemical analysis revealed an improvement of the protective properties of the coating that could be assigned to a slow absorption rate of the electrolytes in the polymeric matrix and a lesser amount of absorbed water than the unloaded film.
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Monetta, T., Acquesta, A., Carangelo, A. et al. Considering the effect of graphene loading in water-based epoxy coatings. J Coat Technol Res 15, 923–931 (2018). https://doi.org/10.1007/s11998-018-0045-8
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DOI: https://doi.org/10.1007/s11998-018-0045-8