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Experimental and Theoretical Investigation of Thiazolyl Blue as a Corrosion Inhibitor for Copper in Neutral Sodium Chloride Solution

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School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
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Material Corrosion and Protection Key Laboratory of Sichuan province, Zigong 643000, China
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School of Material and Chemical Engineering, Tongren University, Tongren 554300, China
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Chemistry Department, Faculty of Science and Arts, Al Baha University, Baljarashi 65635, Saudi Arabia
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Bomin Electronics Ltd., Meizhou 514021, China
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(6), 1042; https://doi.org/10.3390/ma11061042
Received: 24 May 2018 / Revised: 9 June 2018 / Accepted: 13 June 2018 / Published: 19 June 2018
The anticorrosion effect of thiazolyl blue (MTT) for copper in 3% NaCl at 298 K was researched by electrochemical methods, scanning electron-microscopy (SEM), and atomic force microscopy (AFM). The results reveal that MTT can protect copper efficiently, with a maximum efficiency of 95.7%. The corrosion inhibition mechanism was investigated by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectral (FT-IR), and theoretical calculation. The results suggest that the MTT molecules are adsorbed on metal surface forming a hydrophobic protective film to prevent copper corrosion. It also indicates that the MTT and copper form covalent bonds. The molecular dynamic simulation further gives the evidence for adsorption. The adsorption isotherm studies demonstrate that a spontaneous, mixed physical and chemical adsorption occurs, which obeys Langmuir adsorption isotherm. The present research can help us better understand the corrosion inhibition process and improve it. View Full-Text
Keywords: corrosion; copper; electrochemistry; XPS; molecular simulation corrosion; copper; electrochemistry; XPS; molecular simulation
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MDPI and ACS Style

Feng, L.; Zhang, S.; Qiang, Y.; Xu, Y.; Guo, L.; Madkour, L.H.; Chen, S. Experimental and Theoretical Investigation of Thiazolyl Blue as a Corrosion Inhibitor for Copper in Neutral Sodium Chloride Solution. Materials 2018, 11, 1042.

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