%0 Journal Article %T Corrosion Inhibition of Carbon Steel in 1 M HCl using Monopolar Surfactants Derived From 3-Methyl-1,2,4- Triazole-5-Thione %J Analytical and Bioanalytical Electrochemistry %I 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 %Z - %A Bouchaib, Aithaddou %A Elanza, Said %A Driss, Chebabe %A Ahmad, Oubair %A Ibn Ahmed, Said %D 2022 %\ 04/30/2022 %V 14 %N 4 %P 374-384 %! Corrosion Inhibition of Carbon Steel in 1 M HCl using Monopolar Surfactants Derived From 3-Methyl-1,2,4- Triazole-5-Thione %K Surfactants %K 1 M HCl solution %K 1.2.4-triazole-5-thione %K Inhibitor %K Carbon Steel %R %X In this work, we have synthesized the surfactant compounds derived from 2-(N-Alkyl-3-methyl-1,2,4-triazolthioyl) acetic acid (MTSACCn; n=10, n=11 and n=12). These compounds have been purified and identified using several spectroscopic methods such as 1H NMR; 13C NMR spectroscopy. The molecular aggregation of MTSACCn has been foxed using tensiometer apparatus. The electrochemical study was carried out using a coupling of potentiodynamic and electrochemical impedance methods. The polarization curves indicate that the MTSACCn act as mixed-type inhibitors of carbon steel in 1M HCl solution. The electrochemical impedance spectroscopy measurements showed that all synthesized compounds act by establishing a barrier layer on the steel surface. Therefore, we noted that the inhibition efficiency increases with increasing of concentrations inhibitors. Also, the MTSACC12 is the best inhibitor, its inhibition efficiency reached a maximum value of 95% at 510-4 M. The adsorption of all surfactants studied follows the Langmuir isotherm. %U https://www.abechem.com/article_252039_513e8c0fdac9bace81790382f6adb498.pdf