Purpose The purpose of this study is to develop an organic coating to mitigate the corrosion of exhaust gas fans in acid regeneration processes. Design/methodology/approach In this research, a composite modified epoxy resin (F-GF/EP-PU) coating was prepared using epoxy resin (EP) as the base material, polyurethane prepolymer (PU) as the modifier and functionalized glass flake (F-GF) as the filler. The modification effect, thermal stability and mechanical properties of F-GF/EP-PU composites were evaluated by Fourier transform infrared, thermogravimetric analysis and tensile testing, respectively. The corrosion resistance of F-GF/EP-PU coating was evaluated by electrochemical impedance spectroscopy. Findings The combination of PU and F-GF enhances the mechanical properties, thermal stability and acid corrosion resistance of the F-GF/EP-PU coating. After 21 days of immersion in an 80°C solution containing 1 Wt.% HCl and 3.5 Wt.% NaCl, the low-frequency impedance of the coating remains above 10¹° O·cm2, indicating its excellent protective capabilities. Originality/value This study simulates harsh conditions in actual working environments, and the coating exhibits excellent protective capabilities in harsh environments.
An et al. (Tue,) studied this question.