TY - JOUR ID - 43505 TI - Berberis Aristata: A Highly Efficient and Thermally Stable Green Corrosion Inhibitor for Mild Steel in Acidic Medium JO - Analytical and Bioanalytical Electrochemistry JA - ABEC LA - en SN - - AU - Karki, Nabin AU - Neupane, Shova AU - Chaudhary, Yogesh AU - Gupta, Dipak Kumar AU - Yadav, Amar Prasad AD - Central Department of Chemistry, Tribhuvan University, Kathmandu, Nepal Y1 - 2020 PY - 2020 VL - 12 IS - 7 SP - 970 EP - 988 KW - Corrosion inhibitor KW - Berberis aristata KW - Weight loss KW - Potentiodynamic polarization KW - electrochemical impedance spectroscopy DO - N2 - 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. UR - https://www.abechem.com/article_43505.html L1 - https://www.abechem.com/article_43505_90cfa14044043e45776c41be9ee40a74.pdf ER -