Abstract
Abstract An organic/inorganic couple based on halloysite nanotubes (HNT) was employed to provide active corrosion protection on mild steel in 3.5 wt% sodium chloride solution. The HNT impregnated with green aqueous extract of Basil (BNC) was used as active host of corrosion inhibitors. The chemical characterization of BNC was done by field emission-scanning electron microscopy (FE-SEM), Fourier transformation infrared spectroscopy (FT-IR), and thermogravimetric analysis (TGA). Also, the time-dependent release of corrosion inhibitors was confirmed through ultraviolet-visible spectroscopy (UV–vis). The significant corrosion inhibition efficiency of the active system (about 98%) was proved by electrochemical analyses. The synergistic effect based on formation of chelate between inhibitor molecules and Zn2+ cations, leading to surface film formation, was proposed as the main mechanism for considerable long-term corrosion protection of bi-component system.
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