Electrochemical and Theoretical Studies of 2-Acetyl Pyridine and Acetophenone Derivatives as Corrosion Inhibitors for Mild Steel in HCl Solution

Abstract

2-Acetyl pyridine nicotinic hydrazone and acetophenone nicotinic hydrazone have prepared and their corrosion inhibition properties for mild steel in 1 M HCl were studied using weight loss, electrochemical and density functional theory (DFT) methods. Both inhibitors showed good inhibition ability and their adsorption on mild obeyed Langmuir adsorption isotherm. Polarization measurements show that they can be classified as inhibitors of mixed type. The inhibition efficiencies of 2-acetyl pyridine nicotinic hydrazone and acetophenone nicotinic hydrazone at 2 mM optimum concentration are 96.5% and 87.7% respectively.