▎ 摘　　要

Synthesis of nanocomposite coatings embracing graphene oxide nanosheets (GONSs) and graphene oxide quantum dots (GOQDs) dispersed homogeneously in a Ni-Fe binary alloy coating is reported. The results of surface characterization and corrosion resistance of the coating in contact with salty solution as a function of GONS concentration show that the corrosion current density of the Ni-Fe/GONS coating made under an optimal concentration of 0.1 g L(-1)of GONS is about 90.7% lower than that of the Ni-Fe alloy coating. Furthermore, the comparison of the corrosion resistance of Ni-Fe/GOQD and Ni-Fe/GONS nanocomposites indicates that the effect of GOQDs on improving the corrosion parameters is significantly better than that of GONSs. The corresponding corrosion rate of Ni-Fe/GOQDs shows a minimum value of 0.975 mpy. Therefore, it can be concluded that the mass fraction and size of the reinforcement phase play an important role in corrosion protection for nanocomposite coatings. This introduces a new aspect of GOQDs for use as fillers in corrosion-resistant metallic alloy coatings.