Recent advances in the use of benzimidazoles as corrosion inhibitors

Maria Marinescu

doi:10.1186/s13065-019-0655-y

Recent advances in the use of benzimidazoles as corrosion inhibitors

BMC Chem. 2019 Dec 23;13(1):136. doi: 10.1186/s13065-019-0655-y. eCollection 2019 Dec.

Author

Maria Marinescu¹

Affiliation

¹ Department of Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90-92 Şoseaua Panduri, sector 5, 050663 Bucharest, Romania.

Abstract

Background: Benzimidazole, a key heterocycle in therapeutic chemistry, and its derivatives, are recently mentioned in the literature as corrosion inhibitors for steels (CS, MS), pure metals (Fe, Al, Cu, Zn) and alloys. Benzimidazoles are good corrosion inhibitors for extremely aggressive, corrosive acidic media such as 1 M HCl, 1 M HNO₃, 1.5 M H₂SO₄, basic media, 0.1 M NaOH or salt solutions. Benzimidazole derivatives act as mixed type inhibitors, exhibiting stronger inhibitive effect on the cathodic reaction than on the anodic one.

Conclusion: These review highlights recent research in the field of benzimidazole compounds that their role as corrosion inhibitors, the structure of the compounds, electrochemical studies, the experimental conditions, the proposed mechanisms as well as the quantum theoretical studies that predict the structure of the compounds with inhibition properties.

Keywords: Corrosion science; Electrochemical impedance spectroscopy; Inhibition efficiency; Nanomaterials; Organic synthesis.

Publication types

Review