Amino/Keto Derivatives of Pyrazole as Effective Corrosion Inhibitors for Mild Steel in an Acidic Medium: Surface Morphological, Electrochemical, and Computational Studies.

ABSTRACT: The corrosion inhibition performance of two pyrazole derivatives, 3-methyl-1H-pyrazol-5-amine (MPA) and 3-methyl-1H-pyrazol-5-(4H)-one (MPO), on mild steel (MS) in 1 M H₂SO₄ was examined through weight loss, electrochemical methods (polarization and impedance), and quantum chemical analyses. The inhibition efficiency improved with an increasing concentration, achieving 92.28% for MPA and 88.14% for MPO at 0.8 mg/L and 303 K. The adsorption process adhered to the Freundlich model, indicating a heterogeneous interaction on the surface. Electrochemical tests revealed that MPA exhibited superior inhibition at 96.47%, compared to MPO's 85.55% at 0.8 g/L. UV-vis spectroscopy indicated that MPA decreased the band gap energy from 5.44 to 5.28 eV, suggesti

SUBMITTER: Kaur N 

PROVIDER: S-EPMC12004140 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature