Mercaptobenzothiazole functionalized ionic liquids as additive in lithium complex grease: rheological and tribological performances
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 14 November 2023
Issue publication date: 22 November 2023
Abstract
Purpose
This study aims to probe the applicability of 2-mercaptobenzothiazole (MBT) functionalized ionic liquids (ILs) as additives in lithium complex grease (LCG) by researching the corrosion inhibiting, rheological and tribological performances.
Design/methodology/approach
Electrochemical tests such as electrochemical impedance spectroscopy and potentiodynamic polarization curves were used on Gamry electrochemical workstation to research the corrosion inhibition properties of ILs in 1.0 M HCl corrosive solution. The rheological properties of different grease samples were tested on a rheometer. The tribological properties were investigated on SRV-V oscillating reciprocating friction and wear tester. Scanning electron microscope, X-ray spectrometer and X-ray photoelectron spectrometer were used to characterize the lubricating mechanism.
Findings
The 2-MBT functionalized ILs have excellent corrosion inhibition properties. When used as additives in LCG, they both exhibited enhancing effects on thermostability, colloid stability and structural recoverability, and furthermore, outstanding friction-reducing and antiwear properties were also obtained. Surface analysis indicated that the superior lubricating performances of 2-MBT functionalized ILs were mainly ascribed to the formation of tribochemical products on wear tracks, including organic compounds with C–O bond, Fe2O3 and FeS2.
Originality/value
The 2-MBT-based ILs synthesized in this study were multifunctional additives with excellent corrosion inhibiting and tribological properties, which would have a very broad application prospect in lubricating grease industry.
Keywords
Acknowledgements
This work was supported by the National Natural Science Foundation of China (51975559 and 21902080) and Inner Mongolia Natural Science Foundation (2021MS02029).
Declarations of competing interests: The authors declare no competing interests.
Since submission of this article, the following authors have updated their affiliations: Yi Li and Songwei Zhang are at the Qingdao Center of Resource Chemistry and New Materials, Qingdao, China.
Citation
Yang, H., Ye, C., Li, Y. and Zhang, S. (2023), "Mercaptobenzothiazole functionalized ionic liquids as additive in lithium complex grease: rheological and tribological performances", Industrial Lubrication and Tribology, Vol. 75 No. 10, pp. 1161-1169. https://doi.org/10.1108/ILT-04-2023-0108
Publisher
:Emerald Publishing Limited
Copyright © 2023, Emerald Publishing Limited