▎ 摘　　要

In this research, a smart epoxy coating was designed using GO sheets functionalized (non-covalently) with phytic acid (Ph) molecules and zinc (II) cations. Ultraviolet-visible spectroscopy (UV-Vis), Raman spectroscopy, X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and inductively coupled plasma (ICP) were conducted to prove the adsorption of inhibiting species on the GO surface. Alongside the electrochemical impedance spectroscopy (EIS) and polarization methods, grazing incidence XRD (GI-XRD) and FE-SEM analyses were carried out on the plates exposed to the modified GO-containing solutions. The coated samples were subjected to the EIS, salt spray test (SST), pull-off, and cathodic delamination (CD) methods. The characterization analyses confirmed the adsorption of the Zn2+ cations and Ph molecules. The adequate inhibition efficiency of the GOZn400Ph nanosheets in the saline solution was verified by the electrochemical techniques. The GOZnPh/ EP coating exhibited the highest low-frequency impedance value after 49 days (~109 omega cm2). In addition to the superior barrier protection properties, the GOZnPh nanosheets promoted active protection ability. The inclusion of the GOZnPh increased the dry adhesion strength and reduced the adhesion loss.