Abstract
In this research, for the first time, sodium gluconate (SG) and zinc nitrate hexahydrate (Zn) were effectively inbuilt into NH2-MIL-125 (Ti) decorated graphene oxide (GO) nanolayers and then embedded into an epoxy coating (EP) to create an active (self-healing)/passive (barrier) anti-corrosion organic coating system. Various experiments were conducted to determine the characteristics of the synthesized nanomaterials. In addition, electrochemical impedance spectroscopy (EIS) techniques were used for the solution-phase study and exhibited 88% inhibitory efficacy for GO@MOF/SG-Zn. Moreover, the EIS test demonstrated that incorporating GO@MOF/SG-Zn into the EP enhanced its self-healing and barrier abilities. The total resistance (Rt) values of 636.14 KΩ.cm2 were obtained from the scratched EP-GO@MOF/SG-Zn sample, whereas the highest Rt values for the scratched EP and EP-GO were 91.25 and 76.78 KΩ.cm2, respectively. Also, after 84 days, the impedance value for the EP-GO@MOF/SG-Zn reduced to 10.51 Ω.cm2, which was a minor decrease among the examined samples.
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