▎ 摘　　要

The corrosion resistance behavior of graphene oxide (GO) sheets-coated carbonyl iron (CI) microspheres (GO/p-CI sample) was investigated and compared with that of bare CI particles. The GO coating on the CI particles was achieved by utilizing 4-aminobenzoic acid as grafting agent. The cyclic voltammetry of the electrode containing this GO/p-CI sample in 1 mol/L KCI solution does not show any oxidation-peak in contrast to that of the bare carbonyl iron (CI) containing electrode. The charge transfer resistance of GO/p-CI sample was measured to be higher than that of bare Cl. The corrosion-potential shifts towards the positive potential direction confirming higher passivity/less corrosive nature of the GO/p-CI sample. Furthermore, the corrosion-current of GO/p-CI sample was lower than that of the bare CI particles. Our results confirm the passivity and excellent corrosion protection behavior of the GO coating on iron structures. (C) 2018 Elsevier Ltd. All rights reserved.