Preparation of two‐dimensional boron nitride‐layered double hydroxide hybrid to reinforce the corrosion protection of the epoxy coating

Abstract

AbstractIn this study, DBNs‐aminated layered double hydroxide (ALDH) was prepared by connecting ALDH with hydroxylated boron nitride nanosheet (OH–BNs) which was obtained by high‐temperature steam method from hexagonal boron nitride nanosheet (h‐BNs) through the polydopamine. DBNs‐ALDH was characterized by fourier‐transform infrared spectroscopy, x‐ray diffraction, scanning electron microscope, energy dispersive spectrometer, transmission electron microscope, Raman, and x‐ray photoelectron spectroscopy analyses to prove the success of the synthesis. Change of chloride ion concentration was chosen to evaluate the ion exchange function of DBNs‐ALDH. Then, the epoxy resin (EP) mixed with DBNs‐ALDH was coated on the Q215 steel to form a composite epoxy coating. The electrochemical impedance spectroscopy test and brine immersion test were used to characterize the anticorrosion performance of composite EP coating. The results revealed that the DBNs‐ALDH reinforced the anticorrosion performance of the EP coating.