1. School of Materials Science and Engineering,Ocean University of China,Qingdao 266100,China
2. Key Laboratory of Advamced Marine Materials,Key Laboratory of Marine Environmental Corrosion and Bio-fouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China
3. Hubei Keying New Materials Technology Co.,Ltd.,Zhongxiang 431900,China
4. Department of Chemical Technology of Composite Materials,National Technical University of Ukraine"Kyiv Polytechnic Institute",Kyiv 03056,Ukraine
6. Institute of Chemistry,Henan Academy of Sciences,Zhengzhou 450046,China;North China University of Water Resources and Electric Power,Zhengzhou 450046,China
In this paper,1-butyl-3-methylimidazole tetrafluoroborate([BMIM]BF4)is used as corrosion inhibitor.Polyacrylonitrile(PAN)is used to load the corrosion inhibitor.PAN/[BMIM]BF4 hybrid nanofibers are successfully synthesized by electrospinning technology.The alkyd varnish is coated on the fiber membrane to prepare a composite coating,and then a series of tests are carried out on the self-healing and anticorrosive performance of the composite coating.It is observed by scanning electron microscope that the fiber morphology is stable and there is no bead-like structure.The composition of the composite fiber is analyzed by Fourier infrared spectroscopy,and it is confirmed that the hybrid nanofiber was successfully prepared.3D laser confocal scanning microscope was used to observe the corrosion morphology and profile of the carbon steel.The composite coating shows good self-healing performance.[BMIM]BF4 can form a protective film on the surface of the bare carbon steel substrate through physical adsorption or chemical adsorption in an alkaline environment.Electrochemical impedance spectroscopy was tested and analyzed.It is found that the maximum corrosion inhibition efficiency of the coating is 88.5％in 3.5 wt.％alkaline NaCl solution.Compared with the blank coating without nanofibers,the composite fiber varnish composite coating exhibits good self-healing and anti-corrosion properties.
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