Adsorption Isotherm and Activation Energy of Inhibition of Alkaloids on Mild Steel Surface in Acidic Medium

Alkaloids as green inhibitors were extracted from three different plants Rhynchostylis retusa, Artimesia vulgaris,and Solanum tuberosum. Weight loss measurement in mild steel has been carried out the presence and absence of individually an acidic medium. measurements at temperatures are used to calculate thermodynamic parameters. The weight concentrations find adsorption isotherm found that it obeys Langmuir with R2 values 1, 0.996 for inhibitors. Activation energy, enthalpy, entropy have calculated. It is value all these parameters increased addition free energy system calculated (-17.46 kJ mol-1) indicating process spontaneous there physical MS-Inhibitor interface.