Corrosion inhibition behavior of chalcone oxime derivatives on carbon steel in 0.5 M H2SO4

In this work the adsorption and corrosion inhibition conduct of chalcone oxime derivatives on carbon steel in 0.5 M sulfuric acid solution at various temperatures (293, 303, 313, and 323 K) were investigated through weight loss measurements, potentiodynamic polarization, and electrochemical impedance spectroscopy. Results reveal that CO–H and CO–OMe exhibit an excellent inhibition efficiency of 95 and 96% at a concentration of 4.48 × 10−4 M and 293 K, respectively. The compounds are classified as mixed type inhibitors. Moreover, the influence of temperature and the activation parameters disclose that CO–H and CO–OMe are chemisorbed on the carbon steel surface. The adsorption of CO–H and CO–OMe follows Langmuir isotherm. The surface morphology was evaluated using scanning electron microscopy (SEM) and the adsorption behavior was analyzed by UV–visible. MD simulation data show good agreement with experimental results.