Abstract
Graphene oxide–titanium (GO-Ti) composite materials were fabricated using GO as a precursor and then anchoring nano titanium (Nano-Ti) particles on GO sheets with the help of a silane coupling agent. Then, the coating samples were prepared by dispersing GO, Nano-Ti particles, and GO-Ti in an epoxy resin at a low weight fraction of 1 wt %. The GO-Ti composites were investigated by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The dispersibility and anti-corrosion mechanism of the coatings were studied by sedimentation experiments, electrochemical impedance spectroscopy (EIS), SEM, and salt spray tests. The mechanical properties of the coatings were analyzed by friction and wear tests. The results showed that the Nano-Ti particles were successfully loaded on the GO surface by chemical bonds, which made GO-Ti composites exhibit better dispersibility in the epoxy than GO. Compared with Nano-Ti particles and GO, the GO-Ti composite exhibited significant advantages in improving the corrosion resistance of epoxy coatings at the same contents, which was attributed to the excellent dispersibility, inherent corrosion resistance, and sheet structure. Among the different proportions of composite materials, the GO-Ti (2:1) material exhibited the best dispersibility and corrosion resistance. In addition, the composite material also greatly improved the wear resistance of the coating.
Highlights
Metal corrosion has become a very serious problem, which causes enormous losses to human society
As a sheet structural material, graphene has the advantages of high specific surface area, excellent barrier properties, high chemical stability, and good electrical conductivity, which can significantly improve the comprehensive performance of anti-corrosive coatings [8,9,10]
The experimental results show that the Graphene oxide–titanium (GO-Ti) composite material can effectively improve the corrosion resistance and wear resistance of the coating, which is due to the sheet structure, excellent mechanical properties, and lubrication and cross-linking buffering function
Summary
Metal corrosion has become a very serious problem, which causes enormous losses to human society. Epoxy resin (EP) is widely used in organic anti-corrosive coatings due to its good corrosion resistance, strong adhesion to metal substrate, and low cost [4,5]. As a sheet structural material, graphene has the advantages of high specific surface area, excellent barrier properties, high chemical stability, and good electrical conductivity, which can significantly improve the comprehensive performance of anti-corrosive coatings [8,9,10]. A nano GO-Ti composite material with excellent dispersibility was prepared, which was added to the epoxy resin to improve the corrosion resistance. The experimental results show that the GO-Ti composite material can effectively improve the corrosion resistance and wear resistance of the coating, which is due to the sheet structure, excellent mechanical properties, and lubrication and cross-linking buffering function. This study is of great significance for the practical application of GO in the field of anti-corrosion
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
