Corrosion Inhibition Efficiency of Fruits Extracts of Casuarina Equisetifolia on Mild Steel in HCL
Abstract
The corrosion inhibition efficiency of fruit extracts of Casuarina equisetifolia on mild steel has been studied in HCl. Weight loss and thermometric methods have been employed. Various concentration of ethanolic fruit extracts used in both these methods are 0.2, 0.4, 0.6, 0.8 and 1%. The 1, 2 and 3 M concentrations of HCl were utilized in weight loss method, while higher concentrations were used in thermometric method such as 2, 3 and 4 M. Results show that corrosion inhibition efficiency increases with increase in concentration of inhibitor and decreases with increase in acid strength. Weight loss and thermometric methods are in good agreement with each other. Maximum inhibition efficiency (91.15 %) was observed in 1M HCl with 1% inhibitor concentration.