Abstract:
In order to enhance the anti-corrosion performances of epoxy coatings, first, graphene oxide (GO) was prepared by modified Hummers method. Then, by loading 3-aminopropyltriethoxysilane (KH550) modified nano-TiO
2 on the surface of GO, composite particles of modified nano-TiO
2 and GO (TiO
2-GO) were prepared, and TiO
2-GO were characterized by FTIR, XRD and SEM. Finally, the TiO
2-GO were dispersed in epoxy, and TiO
2-GO/epoxy coatings whose TiO
2-GO contents were 1wt%, 2wt% and 3wt% and pure epoxy coatings were fabricated, respectively. The fracture surface morphologies of coatings were observed by SEM, and the anti-corrosion performances of coatings were characterized by electrochemical workstation and high temperature and high pressure corrosion test. The results demonstrate that nano-TiO
2 connects with GO by chemical bond, and dispersing TiO
2-GO in epoxy coating can evidently enhance the anti-corrosion performances of epoxy coatings. The research provides references for improving the anti-corrosion performances of epoxy coatings by means of adding GO.
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