Acetylcholine and Rivastigmine as Corrosion Inhibitors of Cu – Sn - Zn – Pb Alloy in Hydrochloric Acid Environment: DFT & Electrochemical Approach

The study on the action of Acetylcholine and Rivastigmine as Corrosion Inhibitors Cu – Sn - Zn Pb Alloy in Hydrochloric Acid Environment was carried out using density functional theory, electrochemical impedance spectroscopy, Potentiodynamic polarization, Scanning electron microscopy weight loss. result revealed that both expired drugs were good inhibitors Environment. This confirmed from results loss (99.1 % 95.0 %), spectroscopy (EIS) (92.5 91.8 polarization (97.4 87.1 %). Both able to increase charge transfer resistance corrosion current densities electrical solution reduce double layer capacitance metal interface. Inhibition a adsorption inhibitor molecules surface. Thermodynamically, showed greater stability surface, spontaneous forward direction reduction level disorderliness. demonstrated mixed type inhibition while physical mechanism proposed for interaction. Langmuir isotherm obeyed data fitted adequately regression coefficient approximately unity. A monolayer deduces.