Analytical and Bioanalytical Electrochemistry is an international scientific journal, which is published online every 3 months (since 2009), every 2 months (since 2011) and monthly (since 2018) by Center of Excellence in Electrochemistry, University of Tehran Analytical and Bioanalytical Electrochemistry - 12 7 2020 07 31 Berberis Aristata: A Highly Efficient and Thermally Stable Green Corrosion Inhibitor for Mild Steel in Acidic Medium 970 988 43505 EN Nabin Karki Central Department of Chemistry, Tribhuvan University, Kathmandu, Nepal Bhaktapur Multiple Campus, Tribhuvan University, Bhaktapur, Nepal Shova Neupane Central Department of Chemistry, Tribhuvan University, Kathmandu, Nepal 0000-0002-3692-5123 Yogesh Chaudhary Central Department of Chemistry, Tribhuvan University, Kathmandu, Nepal Dipak Kumar Gupta Central Department of Chemistry, Tribhuvan University, Kathmandu, Nepal Trichandra Multiple Campus, Tribhuvan University, Kathmandu, Nepal Amar Prasad Yadav Central Department of Chemistry, Tribhuvan University, Kathmandu, Nepal 0000-0002-8592-4856 Journal Article 2020 07 11 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. https://www.abechem.com/article_43505_51a9f18aee2f0afe795224d681c9b5ac.pdf