Abstract
BackgroundThe corrosion problem of Cu has aroused people's high attention while it is used in various fields of society. Organic compounds have great potential as high-efficiency corrosion inhibitors because of their practical and economical. MethodsThe anti-corrosion performance of 2-Amino-6-(Methylsulfonyl)Benzothiazole (AMB) was studied by electrochemical experiment, weight loss measurements complemented by surface analysis using Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The interaction between AMB and copper was studied at molecular level by using theoretical calculation. Significant findsThe electrochemical experiment demonstrated that as the consistence of AMB augmented, the anti-corrosion effect increased, and when the concentration reached 3 mM, the anti-corrosion efficiency (η) was 95.95%. And the change of temperature has no significant effect on the corrosion inhibition efficiency. Weight loss measurements effectively support the phenomenon of electrochemical experiment. Besides the phenomenon of FTIR and XPS intuitively show the information of bonding between AMB and copper. Employing SEM and AFM, proving AMB can effectively adsorb on the interface of copper. Langmuir adsorption model illustrates that the adsorption of AMB is mixed adsorption. The mechanism of corrosion inhibition is further elucidated by quantum chemical calculation and molecular dynamics simulation.
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