Corrosion Inhibitive Effects of Madhuca Longifolia (ML) on Mild Steel In 1N HCl Solution

The inhibitive action of leaves extract of Madhuca longifolia (ML) on mild steel corrosion in 1N HCl solution was studied using Weight loss method, Potentiodynamic polarization and Electro chemical impedance spectroscopic measurement (EIS). The nature of the protective film on the metal surface has been characterized by scanning Electron microscopy (SEM). Organic moieties present in the extract are found responsible for effective performance of inhibitor which is well supported by FTIR studies. The result obtained showed that the extracts functioned as good inhibitors in HCl solution. Inhibition efficiency was found to increase with increasing concentration of ML extract and reached the maximum of 96% at 40ppm.