Inhibitory effect of amlodipine drug on corrosion of mild steel in HCl solution

The corrosion inhibition of mild steel in HCl solution with amlodipine drug at room temperature (similar to 30 degrees C) has been studied using the weight loss technique. The result show that the inhibition efficiency increased with increase in concentration of amlodipine. It is found that the inhibition process with amlodipine obey the Langmuir adsorption isotherm. From the weight loss trends of the metal over time, the concentration of corroded mild steel is estimated; from which the inhibition process is predicted to follow a first order kinetics.