Comparison of an oil-miscible ionic liquid and ZDDP as a lubricant anti-wear additive

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• 作者：Jun Qu ; Huimin Luo ; Miaofang Chi ; Cheng Ma ; Peter J. Blau ; Sheng Dai ; Michael B. Viola
• 关键词：Oil-soluble ionic liquid ; Lubricant additives ; Tribo-film ; ZDDP
• 刊名：Tribology International
• 出版年：March, 2014
• 年：2014
• 卷：71
• 期：Complete
• 页码：88-97
• 全文大小：7480 K

文摘

This paper reports the anti-scuffing/anti-wear behavior and mechanism of an oil-miscible ionic liquid (IL), trihexyltetradecylphosphonium bis(2-ethylhexyl)phosphate, in a base oil at 1.0 wt% concentration under both room and elevated temperatures. Results are benchmarked against those for a conventional anti-wear additive, zinc dialkyl-dithiophosphate (ZDDP). Reciprocating sliding, boundary lubrication tests were conducted using a piston ring segment against a cylinder liner piece cut from actual automotive engine components. Although the IL and ZDDP worked equally well to prevent scuffing and reduce wear in the room-temperature tests, the IL significantly outperformed ZDDP in the 100 掳C tests. The top surfaces and cross sections of the worn surfaces were characterized to reveal the morphology, thickness, nanostructure, and chemical composition of the IL-induced tribo-films.