CORROSION INHIBITION OF GALVANIZED MILD STEEL USING COPPER, ZINC AND ALUMINIUM NANOPARTICLES
Abstract
Galvanized mild steel, a vital material in infrastructure due to its inherent corrosion resistance, remains vulnerable to degradation in aggressive environments. Conventional corrosion inhibitors often pose significant environmental and health risks, necessitating the development of sustainable, green alternatives. This study aimed to synthesize and characterize plant extract- modified nanoparticles as novel green corrosion inhibitors for galvanized mild steel in acidic, basic, and brine solutions. Zinc, Copper, and Aluminum nanoparticles were biosynthesized using a combined aqueous extract from Chrysophyllum albidum, Mimusops Coriacea, and Terminalia catappa leaves. Corrosion inhibition efficiency was rigorously evaluated through gravimetric weight loss measurements across varying concentrations (0.16 M, 0.08 M, and 0.04 M) of hydrochloric acid (HCl), sodium hydroxide (NaOH), and sodium chloride (NaCl) solutions. Surface characterization techniques, including Fourier Transform Infrared (FTIR) spectroscopy, Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray (EDX) analysis, elucidated adsorption mechanisms and protective film formation.
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