Preparation and their Corrosion Resistances of NiFe 2 O 4 /Zn-Al-rich Epoxy Coatings

Author of the article:CHEN Xian 1,2 , WANG Yongmin 1,2 , LI Qiang 1 , WU Jian 1 , TAO Xuewei 1,2 , BA Zhixin 1,2

Author's Workplace：1. School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China; 2. Jiangsu Province Advanced Structural Materials and Application Technology Laboratory, Nanjing 211167, China

Key Words： epoxy resin; NiFe 2 O 4 ; corrosion resistance; salt spray corrosion

Abstract： The NiFe 2 O 4 /Zn-Al-rich epoxy coating was prepared by addition of NiFe 2 O 4 nanoparticles, flaky Zn powder and
Al powder into epoxy coating. The surface morphology, composition and corrosion behavior of the coating in corrosive
environment were studied by scanning electron microscope (SEM), energy dispersive spectrometer (EDS), electrochemical
test and neutral salt spray test. The results show that the nanoparticles NiFe 2 O 4 effectively fills the pores between the
overlapping metal powders in the epoxy Zn-Al coating, improving the compactness of the coating, and the cationic
selectivity enhances the ability of the coating to prevent the infiltration of corrosive media. Compared with the epoxy Zn-Al
rich coating, the corrosion resistance of the composite coating is obviously improved. After 720 h salt spray test, the
coating surface is intact without obvious corrosion point.