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Tribological properties of zirconium phosphate-quinoline compound as an additive in lithium grease

Wenxing Niu (Research Institute of Special Chemicals, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Shanxi, China)
Lei Liu (Research Institute of Special Chemicals, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Shanxi, China)
Hong Xu (Research Institute of Special Chemicals, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Shanxi, China)
Jinxiang Dong (Research Institute of Special Chemicals, College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Shanxi, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 13 August 2018

Issue publication date: 13 November 2018

138

Abstract

Purpose

The purpose of this paper is to study the tribological properties of (C9H8N)4(H2O)4[Zr8P12O40(OH)8F8] (designated as ZrPOF-Q1) used as an additive in lithium grease.

Design/methodology/approach

The tribological properties of ZrPOF-Q1 as an additive in the lithium grease were evaluated with a four-ball tester. To understand the lubrication mechanism, post-test characterization of the contact tracks was performed via three-dimensional (3D) optical profiler, scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS).

Findings

The results reveal that ZrPOF-Q1 exhibits good performance in anti-wear, friction-reducing and load-carrying capacity. The action mechanism is estimated through analysis of the worn surface with SEM, EDS and 3D. The results indicate that ZrPOF-Q1 can adhere on the substrate, protecting the rubbed surfaces from a direct contact, even under high load for a long-time test. ZrPOF-Q1 can adhere on the substrate, protecting the rubbed surfaces from a direct contact, even under high load for a long-time test.

Originality/value

This work illustrates that ZrPOF-Q1 as an additive can improve lubricating performance. These tribological properties make ZrPOF-Q1 a promising candidate for lubricant additive.

Keywords

Acknowledgements

This work was supported by the Key Program of National Natural Science Foundation of China (grant No. 21436008), the General Program of National Natural Science Foundation of China (grant No. 51372162) and the Program for San Jin Scholars of Shanxi Province of China (2013).

Citation

Niu, W., Liu, L., Xu, H. and Dong, J. (2018), "Tribological properties of zirconium phosphate-quinoline compound as an additive in lithium grease", Industrial Lubrication and Tribology, Vol. 70 No. 8, pp. 1487-1493. https://doi.org/10.1108/ILT-08-2017-0232

Publisher

:

Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited

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