Abstract
Some new compounds which are derived from 8-hydroxyquinoline were both prepared and characterized by IR, NMR spectroscopy and elemental analysis. After the successful synthesis, we tested these products as corrosion inhibitors of mild steel (MS) in 1.0 M HCl at 298 K ± 1. The anticorrosive property was achieved by electrochemical and theoretical methods such as potentiodynamic polarization (PDP), the spectroscopy impedance (EIS), density functional theory (DFT) calculations and the Monte Carlo simulation (MC). The experimental and theoretical results obtained show that these products have an excellent anticorrosive property for the MS. The thermodynamic parameters show that all the compounds adsorb to the metal surface by chemical bonds according to the Langmuir adsorption isotherm. The surface morphology was investigated using scanning electron spectroscopy (SEM) coupled with energy dispersive spectroscopy (EDS) and the FT-IR analysis. The gravimetric solutions after 6 h of immersion were analyzed by the UV–Visible spectrometry.
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