Functionalized Modified BN@F-SiC Particle-Incorporating Epoxy: An Effective Hydrophobic Antiwear and Anticorrosion Coating Material

Abstract

A high-performance BN@F-SiC filler was prepared by depositing hydrophobic nano-SiC grafted by γ-aminopropyltriethoxysilane (KH550) and 1H,1H,2H,2H-trifluoro-noctyltriethoxysilane (FAS) on h-BN grafted by glycidoxy-propyltrimethoxysilane (KH560). A coating containing 1 wt % composite was prepared by dispersing the composite material in epoxy resin (EP), and dispersion, wear resistance, corrosion resistance, electrochemical analysis, and other tests were performed. Also, the influence of h-BN and SiC quality ratios on these properties was systematically studied. The results showed that the BN@F-SiC (2:1) composite material had the best dispersibility in EP. The water contact angle for the coating reached 118°, which indicated that the coating is hydrophobic. The friction coefficient for the BN@F-SiC (2:1)/EP coating was reduced by 89.68% compared with that for the coating without any filler. The potential dynamic polarization test and the salt spray test showed that BN@F-SiC had excellent corrosion inhibition performance. In addition, an EIS test showed that the impedance value for the BN@F-SiC (2:1)/EP coating exceeded 1010 Ω·cm2 at a frequency of 10–2 Hz (|Z|0.01Hz) after 400 h of soaking, which is nearly 103 times higher than that obtained for the EP coating without a filler. This research helps establish a foundation for future research investigating the development of wear-resistant hydrophobic and anticorrosive coatings.

High Anticorrosion Properties due to Electron Spin Polarization of Hydroxyapatite with Point Defects

“…To quantify the Cu-HAP protection performance, after fitting the impedance data using an equivalent circuit composed of time constants as shown in Figure e, we used the R ( QR )­( QR )­( CR ) model to simulate the electrochemical test results and determine the parameters of coating capacitance, , interfacial activity, and resistance (Table ). The impedance value ( Z ) of the sample can be calculated by eqs , where Y and n represent the scale factor and dispersion index (0 < n ≤ 1), respectively.…”

A mucus-inspired solvent-free carbon dot-based nanofluid triggers significant tribological synergy for sulfonated h-BN reinforced epoxy composites

“…20 The use of hydrophobic SiC coated h-BN as nanofillers has improved both the friction and corrosion properties of EPs. 21,22 However, to date, the compatibility between h-BN nano-sheets and resin matrixes is still awaiting improvement owing to the extremely inert surface properties of h-BN nano-sheets, leading to complicated chemical modifications.…”

High-Efficiency Preparation of Reduced Graphene Oxide by a Two-Step Reduction Method and Its Synergistic Enhancement of Thermally Conductive and Anticorrosive Performance for Epoxy Coatings

“…The main problems with the anticorrosive coating of industrial heat exchange equipment are that the coating with a good anticorrosion property has a poor heat transfer property and the coating with a desirable heat transfer property has a poor anticorrosion property. Corrosion of heat exchange equipment is a main reason for its failure, and the working efficiency of the equipment is dependent on its heat transfer property. , Epoxy or modified epoxy resin are used extensively for anticorrosive coatings due to their low cost, good barrier property, and chemical stability. , But, the low thermal conductivity of epoxy (∼0.20 W/(m·K)) limits their applications as a corrosion protective coating for industrial heat exchange equipment . And the existence of microdefects and pinholes of epoxy coating may result in the deterioration of corrosion protection performance.…”

“…1,2 Epoxy or modified epoxy resin are used extensively for anticorrosive coatings due to their low cost, good barrier property, and chemical stability. 3,4 But, the low thermal conductivity of epoxy (∼0.20 W/(m•K)) limits their applications as a corrosion protective coating for industrial heat exchange equipment. 5 And the existence of microdefects and pinholes of epoxy coating may result in the deterioration of corrosion protection performance.…”