Inhibitive and adsorption behavior of new thiazoldinone derivative as a corrosion inhibitor at mild steel/electrolyte interface: Experimental and theoretical studies

The target pyrrolyl-thiazoldin-4-one inhibitor (PEHT) was synthesized by the cyclization of 2-acetylpyrrole thiosemicarbazone with ethyl bromoacetate, and its chemical structure determined different spectroscopic techniques, such as FT-IR, 1H NMR, 13C NMR. PEHT performance, a mild steel (MS) corrosion inhibitor, in an acidic solution evaluated mass loss (ML), potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS) measurements. concentration effect, studied loss, reached maximum protection efficiency at 8 × 10–4 M, 92.6% 303 K. adsorbed on MS surface chemically followed Langmuir isotherm, ?G°ads = ?37.30 kJ mol?1 K, forming protective film deduced from EIS data. PDP measurements revealed that acted mixed-type inhibitor. Further, morphology UV/Vis, SEM AFM which designated supported formation layer surface. Finally, DFT quantum calculations medium were carried out to investigate active sites for binding metal