Characterization of iron surface modified by 2-mercaptobenzothiazole self-assembled monolayers |
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Authors: | Yuanyuan Feng Honglin Zhang Ling Wu |
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Institution: | a Department of Chemistry, Shandong University, Jinan 250100, PR China b State Key Laboratory for Corrosion and Protection, Shenyang 110016, PR China c Department of Chemistry, Qufu Normal University, Qufu 273165, PR China |
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Abstract: | A self-assembled monolayer of 2-mercaptobenzothiazole (MBT) adsorbed on the iron surface was prepared. The films were characterized by electrochemical impedance spectroscopy (EIS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared reflection spectroscopy (FT-IR) and scanning electron microscopy (SEM). Besides, the microcalorimetry method was utilized to study the self-assembled process on iron surface and the adsorption mechanism was discussed from the power-time curve. The results indicated that MBT was able to form a film spontaneously on iron surface and the presence of it could protect iron from corrosion effectively. However, the assembling time and the concentration influence the protection efficiency. Quantum chemical calculations, according to which adsorption mechanism was discussed, could explain the experimental results to some extent. |
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Keywords: | Iron EIS XPS SEM 2-Mercaptobenzothiazole Microcalorimetry |
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