▎ 摘　　要

Polymer coatings like epoxies (EP) are among the most used approaches to overcome corrosion loss in industries. But these coatings have porosities in their structure due to the evaporation of the solvent. This study aims to construct a nanocomposite epoxy coating incorporated with reduced graphene oxide (rGO) nanoparticles utilizing the aqueous Echium ammonium extract (EAE). The surface characterizations were conducted using X-ray photoelectron spectroscopy (XPS), Ultraviolet-visible spectroscopy (UV-Vis), Raman spectroscopy, Fouriertransform infrared spectroscopy (FTIR), dispersibility experiment, and field emission scanning electron microscope (FE-SEM). The anti-corrosion properties were scrutinized by electrochemical impedance spectroscopy (EIS) and neutral salt spray test (NSS). The surface analyses have proved the successful conversion of the carbonyl groups into C-O bonds. The Rt value in the liquid phase has improved by time and reached its maximum after 24 h from immersion which was 66,566 omega.cm2. The high response of the rGO-EAE sample was attributed to the various chelates and complexes constructed by the allocation of the lone pairs of EAE molecules electrons to the vacant d-orbital of the Fe atom. The indirect use of EAE in EP has enriched the barrier function and constructed a protective layer inside the scratch, elucidating the self-healing operation. The EAE molecules have protected via absorbing on the active anodic zones. The presence of modified graphene oxide nanolayers in the epoxy coating not only brought about enhancement in the nanocomposite barrier function but also, owing to the delivery of EAE molecules to the anodic zones of the steel surface, a desirable grade of protection was provided through active inhibition of the anodic zones.