Corrosion Inhibition of Mild Steel Using Green Synthesized Tungsten Oxide Nanoparticles in Acidic Media

Daniel Jildawa, Iliya I. Nkafamiya, S.A. Osemeahon and J. M. Yelwa

International Journal of Scientific Research in Chemistry, 2025, vol. 10, issue 2, 01-11

Abstract: Corrosion is a serious problem in industrial applications, and therefore the need to produce environmentally friendly inhibitors. The current research examines the corrosion inhibition performance of eco-synthesized tungsten oxide nanoparticles (WO₃ NPs) derived from Cassia fistula leaf extract as an inhibitor for mild steel in 1M HCl. Characterization confirmed the successful synthesis of the WO₃ NPs with a granular, closely packed nature. Weight loss measurements revealed that corrosion rates decreased significantly with an increase in the concentration of the WO₃ NPs, with an inhibition of over 85% being achieved with 200 ppm. Electrochemical measurements including cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) revealed enhanced charge storage capacity, an increase in the charge transfer resistance, and a decrease in the corrosion current density. Potentiodynamic polarization studies corroborated the positive shift in the corrosion potential and a great reduction in the current density from 1.2 × 10⁻³ A/cm² (control) to 2.8 × 10⁻⁵ A/cm² with 500 ppm of the WO₃ NPs, demonstrating the immense protective effect of the NPs. Scanning electron microscopy (SEM) revealed a uniform development of a protective layer over the steel surface that prevents the direct acid attack and decreases pitting. The inhibition performance of the WO₃ NPs was comparable to or better than the conventional inhibitors but with eco-friendliness. These findings support the use of the biosynthesized WO₃ NPs as a promising sustainable alternative to the protection of corrosion in an acid environment with potential industrial applications.

Keywords: Corrosion inhibition; tungsten oxide nanoparticles; Cassia fistula; electrochemical studies; green synthesis; mild steel protection (search for similar items in EconPapers)
Date: 2025
Note: Article URL: https://ijsrch.com/home/article/view/IJSRCH251021
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Persistent link: https://EconPapers.repec.org/RePEc:cuo:ijsrch:v10:y2025:i2:id:25

DOI: 10.32628/IJSRCH251021

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