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Research Article | Open Access

Improving the lubrication and anti-corrosion performance of polyurea grease via ingredient optimization

Guanlin REN1,†, Xiaowen SUN2,†, Wen LI1, Hao LI1, Lin ZHANG2, Xiaoqiang FAN2( ), Dongshan LI3, Minhao ZHU1,2
Tribology Research Institute, School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China

† These authors contributed equally to this work.

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Abstract

Thickener formulation plays a significant role in the performance characteristics of grease. The polyurea greases (PUGs) were synthesized using mineral oil (500SN) as the base oil, and by regulating the reaction of diphenylmethane diisocyanate (MDI) and different organic amines. The as-prepared PUGs from the reaction of MDI and cyclohexylamine/p-toluidine exhibit the optimum physicochemical and friction-wear properties, confirming that the regulation of thickener formulation can improve the performance characteristics of grease, including friction reduction, wear, corrosion resistance, and load-carrying capacity. The anti-corrosion and lubrication properties of as-prepared PUGs depend on good sealing functions and a boundary lubrication film (synergy of grease-film and tribo-chemical reaction film), as well as their chemical components and structure.

Keywords

thickenerpolyurea grease (PUG)corrosion resistancetribological properties

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Friction
Volume 9 Issue 5,
October 2021
Pages 1077-1097
DOI: 10.1007/s40544-020-0400-3
Cite this article:
REN G, SUN X, LI W, et al. Improving the lubrication and anti-corrosion performance of polyurea grease via ingredient optimization. Friction, 2021, 9(5): 1077-1097. https://doi.org/10.1007/s40544-020-0400-3

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Received: 13 January 2020
Revised: 28 March 2020
Accepted: 07 May 2020
Published: 05 November 2020
© The author(s) 2020

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