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Corrosion inhibition behavior of four benzimidazole derivatives and benzotriazole on copper surface

Lin Liu (Liaoning Province Key Laboratory for Synthesis and Application of Functional Compounds, College of Chemical and Material Engineering, Bohai University, Jinzhou, China)
Shuang Lu (College of Chemical and Material Engineering, Bohai University, Jinzhou, China)
Ya Qi Wu (College of Chemical and Material Engineering, Bohai University, Jinzhou, China)
Jin Yin Xie (College of Chemical and Material Engineering, Bohai University, Jinzhou, China)
Jinjuan Xing (Liaoning Province Key Laboratory for Synthesis and Application of Functional Compounds, College of Chemical and Material Engineering, Bohai University, Jinzhou, China)

Anti-Corrosion Methods and Materials

ISSN: 0003-5599

Article publication date: 11 October 2020

Issue publication date: 4 December 2020

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Abstract

Purpose

This paper aims to reduce environment pollution caused by benzotriazole. The authors chose one of the best inhibitors from 2-aminobenzimidazole, 2-methylbenzimidazol, 2-mercaptobenzimidazole and benzimidazole in combination with benzotriazole.

Design/methodology/approach

The electrochemical measurement indicated that 2-methylbenzimidazol had the best inhibition behavior. Then, it was mixed with benzotriazole. Techniques such as field emission scanning electron microscopy, atomic force microscopy, Raman spectroscopy and optical contact angle measurements were used.

Findings

The results showed that the inhibition efficiency was up to 99.98%, when the mixture concentration was 20 mmol/L and the molar ratio 1:1.

Originality/value

1-benzotriazole was mixed with 2-methylbenzimidazol for the first time. During the exist of methyl, 2-methylbenzimidazol has the better inhibition; this point was ignored by researchers.

Graphical abstract

Keywords

Acknowledgements

The authors thank the Liaoning Provincial Department of Education Innovation Team Project (LT2015001) and the Liaoning Provincial College Innovation Team Project (2018479–14) for support.

Citation

Liu, L., Lu, S., Wu, Y.Q., Xie, J.Y. and Xing, J. (2020), "Corrosion inhibition behavior of four benzimidazole derivatives and benzotriazole on copper surface", Anti-Corrosion Methods and Materials, Vol. 67 No. 6, pp. 565-574. https://doi.org/10.1108/ACMM-12-2019-2235

Publisher

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Emerald Publishing Limited

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