Open AccessCorrosion Inhibition of Mild Steel in 1 M HCl Solution by Poly(o-aminothiophenol) and Poly(o-aminothiophenol)/CuO Nanocomposites
Author(s) -
U. Anto Maria Jeraldin,
R. Santhi
Publication year - 2021
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2021.23349
Subject(s) - ammonium persulfate , chemistry , nanocomposite , adsorption , langmuir adsorption model , aqueous solution , corrosion , electrochemistry , polymerization , nuclear chemistry , chemical engineering , polymer , polymer chemistry , electrode , organic chemistry , engineering
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. Thesynthesized polymer and its CuO nanocomposites were characterized by employing FT-IR, UV-Visand XRD analysis. Weight loss and electrochemical techniques were used to investigate the inhibitoryperformance of poly(o-aminothiophenol) and poly(o-aminothiophenol)/CuO nanocomposites on mildsteel in 1 M HCl solution. The electrochemical impedance spectroscopic method showed a capacitiveloop, revealing that the corrosion reaction is governed by the charge transfer mechanism. The inhibitorswere of a mixed type, according to polarization measurements. The adsorption process was obeyed bythe Langmuir isotherm. The Langmuir adsorption isotherm was also used to derive thermodynamicadsorption parameters.