Corrosion inhibition effect of Aloe Vera gel: Gravimetric and electrochemical study
By A.K. Singh and S. Mohapatra and B. Pani
Published in Journal of Industrial and Engineering Chemistry
2016
Abstract
Effect of Aloe Vera gel on mild steel corrosion in 1 M \HCl\ medium has been studied using weight loss, electrochemical impedance spectroscopy, and Tafel polarization. These results were supplemented by atomic force microscopy (AFM) and scanning electron microscopy (SEM). This extract is selected for this study in view of its rich source of organic molecules. Tafel polarization studies reveal that Aloe Vera gel extract acts as mixed inhibitor. The activation parameters showed that the inhibitor is adsorbed by both physisorption and chemisorption. The inhibitor showed >90% inhibition efficiency and lowest corrosion rate at optimum concentration of 200 ppm.