Berberis Aristata: A Highly Efficient and Thermally Stable Green Corrosion Inhibitor for Mild Steel in Acidic Medium

Plant extracts are extensively researched as a source of green corrosion inhibitors. herein, we report on a highly efficient and thermally stable corrosion inhibitor from the stem extract of high-altitude shrub berberis aristata. the corrosion inhibition efficiency (ie) of the extract was tested in 1.0 m h2so4 for the corrosion protection of mild steel (ms) by using gravimetric and electrochemical measurements. it displayed a remarkable ie of 90% at 200 ppm and reached to 98.18% at high concentration (1000 ppm) at room temperature. the thermal stability of the adsorbed extract was uncommon among the recently reported plant extracts, giving an ie of 80% at 338k. besides, the adsorption of the extract was extremely efficient, producing an ie of 90% in 15 min. the thermodynamic parameters (δg and ea) showed a chemisorption dominated behavior of the extract. electrochemical measurements indicated a mixed type of inhibitor, and the extract suppressed the corrosion rate by blocking the active surface of the ms.