Morphologic and synergistic effects of GNP/NS binary-filler-based multifunctional coatings with robust anti-corrosion and hydrophobic properties
By Wang, Xingyu; Lin, Zhibin
Published in Progress in Organic Coatings
2021
Abstract
Traditional protective coatings used for metallic structures, such as oil/gas metallic pipelines and bridges, often suffered from premature damage due to either low corrosion resistance or weak mechanical performance. Thus, this study proposed a new nanocomposite coating that reinforced by binary nanofillers with graphene nanoplatelets (GNP) and nano-silica (NS) with multiple functionalities, striving for superior corrosion resistance and hydrophobic properties, as well as promising mechanical damage tolerances. A comprehensive experiment was conducted to characterize their mechanical, electrical, and tribological properties of the new developed nanocomposite coatings. The corrosion protection performance of the coatings was evaluated by electrochemical impedance spectroscopy (EIS) and long-term accelerated salt spray test. Tribological properties were evaluated using abrasion test. Test result demonstrated that the new composite with the combination of GNP with NS exhibited significantly improved corrosion protection performance, mechanical strength, and abrasion resistance. The GNP/NS hybrid filler nanocomposites remarkably enhanced the barrier and corrosion protection properties against environmental attack. Enhanced mechanical properties and wear resistance of the composite coatings allows high damage tolerance for engineering applications.