Abstract
The inhibiting behavior of bis-(2-benzothiazolyl)-disulfide on mild steel corrosion was evaluated in 1 M HCl solution. Weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) techniques were used in this study. In EIS technique, by performing Kramers–Kronig transformations, the experimental results validated, before fitting any theoretical model on them. The obtained results showed that the inhibition efficiency (%IE) increases by increasing the concentration of bis-(2-benzothiazolyl)-disulfide up to 2.02 × 10−4 M (%IE ∼ 62–68). Between the results obtained from various used techniques, a good agreement was found. Polarization curves indicate that the inhibition of the inhibitor is a mixed anodic–cathodic nature and Langmuir isotherm is found as an accurate isotherm describing the adsorption behavior. It also found that its inhibition mechanism of bis-(2-benzothiazolyl)-disulfide is at the interval of physical adsorption and chemical binding. The inhibition efficiency of the inhibitor decreased by rising of temperature in the range of 25–55 °C and these results, verified adsorption behavior of the inhibitor.
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The authors thank the Material Faculty of Sahand University of Technology for financial support.
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Abdeli, M., Parvini Ahmadi, N. & Azari Khosroshahi, R. Influence of bis-(2-benzothiazolyl)-disulfide on corrosion inhibition of mild steel in hydrochloric acid media. J Solid State Electrochem 15, 1867–1873 (2011). https://doi.org/10.1007/s10008-010-1162-1
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DOI: https://doi.org/10.1007/s10008-010-1162-1