Tribological evaluation of α, -diimidazoliumalkylene hexafluorophosphate ionic liquid and benzotriazole as additive |
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Authors: | Bo Yu Feng Zhou Chongjun Pang Bo Wang Yongmin Liang Weimin Liu |
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Affiliation: | aState Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China;bGraduate School, Chinese Academy of Sciences, Beijing 100039, PR China |
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Abstract: | Ionic liquids of α, -diimidazoliumalkylene hexafluorophosphate were synthesized. The tribological properties of the synthetic ionic liquid and the ionic liquid contained additive for contacts of steel/steel were investigated by Optimol SRV oscillating friction and wear tester under ambient conditions. The synthetic ionic liquid presented low friction coefficients and small wear volumes, especially under higher temperatures. The ionic liquid doped with benzotriazole (BTA) showed excellent anti-wear ability. The worn surfaces and chemical nature of the boundary films generated on the metal surfaces were analyzed by scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). SEM results showed slight abrasion on the worn surfaces and XPS results indicated the formation of FeF2, FeF3, Fe3O4, and FePO4 by the tribochemical reactions of ionic liquid with iron during the sliding process. |
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Keywords: | Ionic liquid Lubricant Additive Corrosion Wear |
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