Comparative tribological and corrosion resistance properties of epoxy composite coatings reinforced with functionalized fullerene C60 and graphene

A peony-leaves-derived liquid corrosion inhibitor: protecting carbon steel from NaCl

“…The addition of the peony leaves extract liquid to 3.5 wt.% NaCl increased the contact angle and decreased the surface free energy, as depicted in Figure 16. These changes can be attributed to an adsorbed hydrophobic layer on the surface of carbon steel (83,85), further validating the findings from electrochemical and surface analyses. In summary, the adsorption mechanism of peony leaves derivatives displaced water molecules from the carbon steel surface.…”

Development and Characterization of Anticorrosion and Antifriction Properties for High Performance Polyurethane/Graphene Composite Coatings

“…Many mechanical properties of polymer materials, such as mechanical strength [35,36], tribological performance [37][38][39][40][41][42], thermal stability [19] and electrical conductivity [43,44], can be improved remarkably by incorporating carbon derivatives into polymers. In particular, the antifriction performance of polymer coatings is of practical importance because these coatings are susceptible to damage through scratching and abrasive wear under outdoor service conditions, leading to the loss of mechanical strength.…”

“…The addition of high-performance nanofillers, such as ceramic particles into polymer coatings, is effective in enhancing their antifriction properties. Notably, recent investigations have revealed the significant potential of Gr and its derivatives for producing polymer composite coatings with high antifriction properties [38][39][40][41][42]. For instance, Mo et al [38] investigated the tribological performance of PU composite coatings reinforced with functionalized Gr (FG) and Gr oxide (FGO) and found that FG and FGO enhanced the antifriction property of PU composite coatings owing to their lubricating effects.…”

“…Moreover, they pointed out that the optimized additive range was from 0.25 to 0.5 wt.%. Liu et al [39] evaluated the tribological resistance of an epoxy coating reinforced with functionalized fullerene C60 and Gr. They reported that the wear traces of the composite coating decreased with increases in the contents of functionalized fullerene C60 and functionalized Gr.…”

“…Therefore, Gr can play an essential role in improving the anticorrosion and antifriction properties of polymer coatings. Although a few studies have reported that the anticorrosion and antifriction properties of polymer coatings can be simultaneously altered using Gr additives [38][39][40], the Gr contents employed in those works were relatively low. Moreover, the COF of composite coatings used in those studies increased rapidly to a higher value (over 0.5) after a short sliding distance and the impedance modulus of the composite coatings at the lowest frequency in the Bode plot decreased with the passage of measurement time under immersion in 3.5 wt.% NaCl solution.…”