Electrochemical and thermodynamic studies to evaluate inhibition effect of 2-[(4-phenoxy-phenylimino)methyl]-phenol in 1Â M HCl on mild steel

► Two types of equivalent circuits were proposed to explain impedance data. ► The inhibiting efficiency increased with the increase of APS concentration and temperature. ► ΔSads and ΔHads values are positive and values are decreasing with increasing temperature. ► Orderliness caused by adsorption of APS molecules overrides the disorderness caused by temperature effect.