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Vol. 33 No. 11 (2021): Vol 33 Issue 11, 2021

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Corrosion Inhibition of Mild Steel in 1 M HCl Solution by Poly(o-aminothiophenol) and Poly(o-aminothiophenol)/CuO Nanocomposites

https://doi.org/10.14233/ajchem.2021.23349
U. Anto Maria Jeraldin
PG & Research Department of Chemistry, Auxilium College, Vellore-632006, India
R. Jaya Santhi
PG & Research Department of Chemistry, Auxilium College, Vellore-632006, India

Corresponding Author(s) : R. Jaya Santhi

shanthijaya02@gmail.com

Asian Journal of Chemistry, Vol. 33 No. 11 (2021): Vol 33 Issue 11, 2021

Abstract

The chemical oxidative polymerization of poly(o-aminothiophenol) and poly(o-aminothiophenol)/CuO nanocomposites were performed in aqueous HCl using ammonium persulfate as an oxidant. The synthesized polymer and its CuO nanocomposites were characterized by employing FT-IR, UV-Vis and XRD analysis. Weight loss and electrochemical techniques were used to investigate the inhibitory performance of poly(o-aminothiophenol) and poly(o-aminothiophenol)/CuO nanocomposites on mild steel in 1 M HCl solution. The electrochemical impedance spectroscopic method showed a capacitive loop, revealing that the corrosion reaction is governed by the charge transfer mechanism. The inhibitors were of a mixed type, according to polarization measurements. The adsorption process was obeyed by the Langmuir isotherm. The Langmuir adsorption isotherm was also used to derive thermodynamic adsorption parameters.

Keywords

Aminothiophenol Nanocomposites Corrosion Mild steel Electrochemical studies Adsorption
Anto Maria Jeraldin, U., & Jaya Santhi, R. (2021). Corrosion Inhibition of Mild Steel in 1 M HCl Solution by Poly(o-aminothiophenol) and Poly(o-aminothiophenol)/CuO Nanocomposites. Asian Journal of Chemistry, 33(11), 2626–2632. https://doi.org/10.14233/ajchem.2021.23349
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