Synthesis and characterization of oxime modified graphene oxide: an efficient anti-corrosive agent

Graphene oxide (GO) is considered as an efficient corrosion protector to protect metals and their alloys such as, iron, aluminium, steel. But due to high surface energy of GO, which induces their agglomeration, their dispersion in a polymer paint is a challenging task. Modification of GO is suggested to reduce its agglomeration in a polymer paint. In the current study we have modified GO nano-sheets with an organic moiety, Acetoxime. The Acetoxime modified graphene oxide (GO-Ac) was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction analysis (XRD), UV–Vis spectroscopy and the surface analysis of the materials were done using SEM and EDX analysis. The corrosion inhibition effect of GO and GO-Ac on Aluminum 5083 in 3.5% NaCl solution were investigated by electrochemical data, EIS and PD. The obtained results suggest that modification of GO with Acetoxime enhances its corrosion protection efficiency for aluminum metal. The Density Functional Theory (DFT) approach was also used in the present research to computationally model and examine the corrosion inhibition efficiency of both derivatives.