Appraisal of Adsorption and Inhibition Effect of Expired Micardis Drug on Aluminum Corrosion in Hydrochloric Acid Solution
M. Abdallah, H. Hawsawi, Arej S. Al-Gorair, Mohamed T. Alotaibi, Salih S. Al‐Juaid, Reda Abdel‐Hameed
Abstract
Expired micardis (MIC) drug was investigated as an inhibitor for the corrosion of the aluminum electrode in 1.0 M HCl solution. The anticorrosive efficacy was determined by chemical and electrochemical techniques. The outcomes indicated that the efficacy of inhibition raised with the increasing doses of expired MIC and with lowering temperature. The anticorrosive efficacy values reached to 99.93% at 300 mg/L using electrochemical impedance technique. The anticorrosion was elucidated by the vigor adsorption of expired MIC on the surface of Al through the reaction centers present in its chemical structure. The adsorption obeys Langmuir isotherm. Potentiodynamic polarization classified an expired MIC as a mixed inhibitor. The impact of temperature on the corrosion rate of Al in 1M HCl was studied and when certain concentrations of expired MIC were included. Some thermodynamic variables of activation and absorption were calculated and explained.