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Antioxidant behavior and tribological performance of a novel multifunctional additive in complex lithium grease

Mianran Chao (School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, China, and)
Ming Jin (School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, China, and)
Peiwei Gong (School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, China, and)
Duyi Shen (School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, China, and)
Lili Zhu (Key Laboratory of Extraordinary Bond Engineering and Advance Materials Technology (EBEAM) of Chongqing, Yangtze Normal University, Chongqing, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 11 October 2021

Issue publication date: 28 October 2021

172

Abstract

Purpose

This paper aims to contrastively investigate the antioxidant behavior and tribological performance of a novel multifunctional additive (PBT) and dialkyldithiophosphate (ZDDP) in complex lithium grease (CLG).

Design/methodology/approach

PBT was successfully synthesized through esterification reaction. The antioxidant behavior of PBT and ZDDP was investigated by thermal analysis, and meanwhile, their tribological performance was evaluated by Optimol SRV-IV oscillating reciprocating friction and wear tester (SRV-IV test) and MRS-1J four-ball tester (Four-ball test). Furthermore, their anticorrosion ability was determined by copper strip corrosion test.

Findings

Four-ball tests showed that the extreme pressure property of PBT was a little inferior to that of ZDDP. Besides, all the other results demonstrated that PBT showed more superior antioxidation stability, friction-reduction and antiwear ability, as well as anticorrosion performance than ZDDP.

Originality/value

This work provides a study of hindered phenol derivative as a multifunctional additive in lubricant grease, which can contribute to the development of substitution of ZDDP.

Keywords

Acknowledgements

This work is supported by National Natural Science Foundation of China (51805295, 21802084, 51905304) and Natural Science Foundation of Shandong Province (ZR2019BB021).

Citation

Chao, M., Jin, M., Gong, P., Shen, D. and Zhu, L. (2021), "Antioxidant behavior and tribological performance of a novel multifunctional additive in complex lithium grease", Industrial Lubrication and Tribology, Vol. 73 No. 8, pp. 1122-1128. https://doi.org/10.1108/ILT-10-2020-0380

Publisher

:

Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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