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Tribological studies of S‐N type triazinyl‐containing polysulfides as additives in biodegradable grease

Hongling Yi (School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China)
Kunyang Dang (School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China)
Xiangqiong Zeng (School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China)
Heyang Shao (School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China)
Tianhui Ren (School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 7 March 2008

415

Abstract

Purpose

This paper sets out to study tribological properties, anticorrosive performances and thermal stabilities of two novel S‐N type triazinyl‐containing polysulfides {Bis[2,4‐bis(diethylamino)‐s‐triazin‐6‐yl] polysulfide (BBET‐PS) and Bis[2,4‐bis(di‐n‐butylamino)‐s‐triazin‐6‐yl] polysulfide (BBBT‐PS)} as additives in biodegradable grease, and to estimate the tribochemical mechanism.

Design/methodology/approach

Extreme pressure (EP) and anti‐wear (AW) properties of two compounds at different addition concentration were evaluated using a four‐ball machine. Their wear scar was analyzed with X‐ray photoelectron spectroscopy (XPS) and a scanning electron microscope.

Findings

Two novel S‐N type triazinyl‐containing polysulfides possess excellent load‐carrying capacity, good AW and show good corrosion‐inhibiting performance. The thermal stability of BBB‐PS is better than that of BBE‐PS. According to the XPS results, the triazinyl‐containing polysulfides react with the metal to generate a surface protective film consisting of sulfate, FeS and absorbed compounds containing organic‐N.

Research limitations/implications

The antioxidant and biodegradability of the two novel compounds were not investigated.

Practical implications

Two effective EP and AW additives were synthesized, and maybe potentially industrial applied lubricating grease additives.

Originality/value

The achievement of this study is the synthesis of two triazinyl‐containing polysulfides, which can be effective additives to improve the tribological performance of biodegradable grease.

Keywords

Citation

Yi, H., Dang, K., Zeng, X., Shao, H. and Ren, T. (2008), "Tribological studies of S‐N type triazinyl‐containing polysulfides as additives in biodegradable grease", Industrial Lubrication and Tribology, Vol. 60 No. 2, pp. 79-85. https://doi.org/10.1108/00368790810858377

Publisher

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Emerald Group Publishing Limited

Copyright © 2008, Emerald Group Publishing Limited

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