Enhanced Anti‐Corrosion Performance of Carbon Steels via CeO<sub>2</sub>@BNNSs/Epoxy Resin Composite Coatings
Hongliang Duan, Jiawei Ji, Chaochao Cao, Wenjuan Bai, Zirui Song, Yanming Xue, Chengchun Tang
Abstract
Abstract Due to its excellent physical barrier behavior and high physicochemical stability, hexagonal boron nitride (h‐BN) can improve the anti‐corrosion capacity of a favorite protective coating onto metals. However, the poor dispersion of h‐BN filler in the formation of polymer composites does not promote its further wide application in the field of corrosion protection. In this work, a new CeO 2 @BNNSs filler is highly dispersed into aqueous epoxy (EP) to make nice coatings onto steels. As a result, after immersing them into an NaCl solution of 3.5 wt% for 20 days, the as‐prepared CeO 2 @BNNSs/EP composite coatings can keep an impedance modulus (|Z| f = 0.01 Hz ) value of 9.61 × 10 7 Ω cm 2 , which is larger than those of the blank EP and the EP filled with the h‐BN and BNNSs fillers. In addition, compared to the EP, h‐BN/EP, and BNNSs/EP coatings, the higher corrosion potential, the properties of larger polarization resistance, and lower corrosion current density for the CeO 2 @BNNSs/EP coatings indicate CeO 2 @BNNSs/EP's excellent protective ability to the steel from corrosion. It is believed that this kind of CeO 2 @BNNSs/EP composite materials and its coatings would be highly promising for application in future advanced anti‐corrosion environments and devices.