Coriaria nepalensis Stem Alkaloid as a Green Inhibitor for Mild Steel Corrosion in 1 M H2SO4 Solution

Using natural plant extracts on metallic substances is the most frequently studied green corrosion inhibition approach in science. In this work, Coriaria nepalensis Stem Alkaloid (CNSA) has been successfully extracted and characterized by qualitative chemical (Mayer’s Dragendroff’s) test spectroscopic (UV FTIR) measurement. CNSA employed as a inhibitor for Mild Steel (MS) subjected to 1 M H2SO4 solution. The efficacy assessed weight loss polarization measurement methods. effect of concentration, immersion period, temperature efficiency MS immersed both acid solutions different concentrations have investigated. maximum observed 96.4% 1000 ppm solution 6 h at 18 °C method. Similarly, method 97.03% 3 h. adsorption molecules surface aligns with Langmuir model. free energy obtained ?28.75 kJ/mol indicating physical dominance over adsorption. These findings suggested that greater potential an efficient inhibitor.