Abstract
The corrosion inhibition of mild steel in 1M HCl solution by Piperacillin Sodium was studied by weight loss measurement and electrochemical techniques i.e. Polarization Resistance, Potentiodynamic Polarization and Electrochemical Impedance Spectroscopy (EIS). The results obtainedat 30ºC divulged that this pharmaceutical compound had established 93% inhibition efficiency at an optimum concentration of 7.2×10-4 M. These outcomes show that inhibition takes place by adsorption of the inhibitor on metal surface without altering the mechanism of corrosion process. The adsorption of Piperacillin Sodium takes place according to Langmuir adsorption isotherm. Potentiodynamic polarization studies indicate that Piperacillin Sodium acts as a mixed type of inhibitor. Data collectedfrom EIS studies has been analyzed to model the appropriate equivalent circuit for better explanation of corrosion inhibition process. The inhibition mechanism of Piperacillin Sodium has been discussed.
