ZHANG Zhicai, QI Fugang, ZHAO Nie, OUYANG Xiaoping, TANG Jun, ZHOU Ao, TAN Yali
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Material corrosion and anti-corrosion have always been an indispensable part in material development and application. Epoxy resin is widely used for anti-corrosion due to its excellent anti-corrosion ability, adhesion and mechanical strength. However, with the rapid development of the coatings field, some shortcomings of epoxy resins have been exposed: brittleness, insufficient heat resistance and the existence of holes. In view of these shortcomings, this article summarizes the various modifications of epoxy resin coatings made by domestic and foreign researchers in recent years. First of all, this article summarizes the current mainstream research directions at home and abroad from the selection of modified materials and the innovation of research methods. For the existence of pores, nano micro-inorganic substances with special functions (such as wear resistance, temperature resistance, acid and alkali resistance, etc.) are adopted. Due to poor heat resistance and high brittleness, the epoxy resin has been modified at the molecular level to improve the relevant performance or make the epoxy resin have unique functions. For special applications, bionic design is used to make coatings have antifouling effects, such as hydrophobicity and sterilization, and no pollution to the environment. Secondly, this article also introduces the best anti-corrosion effect of each improved method, and compares the advantages and disadvantages of each method. Finally, the future development trend of epoxy resin anticorrosive coatings is discussed, and the feasibility of various modification schemes in future applications is analyzed.