TY - JOUR ID - 71457 TI - Synergistic Influence of Benzoate Ions on Inhibition of Corrosion of Mild Steel in 0.5m Sulfuric Acid by Benzotriazole JO - International Journal of Engineering JA - IJE LA - en SN - 1025-2495 AU - Shahrabi, T. AU - Hosseini, M. G. AU - Ghorbani, Mohammad AU - Arshadi, M. R. AD - Engineering Department, Tarbiat Modares University AD - Materials Engineering, Tarbiat Modarres University AD - Materials science and Engineering, Sharif University of Technology AD - Chemical & Petroleum Engineering, Sharif University of Technology Y1 - 2003 PY - 2003 VL - 16 IS - 3 SP - 255 EP - 264 KW - Benzoate Ions KW - Benzotriazole KW - Corrosion Inhibition KW - Synergistic effect DO - N2 - The influence of benzoate anions on the corrosion inhibition effect of benzotriazole (BTA) for mild steel in sulfuric acid has been investigated. The investigation was carried out by electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization techniques. The addition of benzoate ions greatly enhances the inhibition efficiency of BTA in a synergistic manner. This effect has been attributed to co-adsorption of benzoate and protonated benzotriazole ions. While inhibition property of BTA has been attributed to adsorption of the molecules on the metal surface, through interaction of lone pair electrons on nitrogen atoms or π electrons of the aromatic ring, followed by polymeric complex formation. In acid solution, in presence of benzoate anions, protonated BTA molecules are adsorbed mostly by columbic attractions on the surface partially covered with benzoate anions. UR - https://www.ije.ir/article_71457.html L1 - https://www.ije.ir/article_71457_8377a516537e9f9c416041b3e8aa5b43.pdf ER -