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A comparison of phosphorus and fluorine containing IL lubricants for steel on aluminium
journal contribution
posted on 2012-06-14, 00:00 authored by Anthony SomersAnthony Somers, S Biddulph, Patrick HowlettPatrick Howlett, J Sun, D MacFarlane, Maria ForsythMaria ForsythIonic liquids have been shown to be highly effective lubricants for a steel on aluminium system. This work shows that the chemistry of the anion and cation are critical in achieving maximum wear protection. The performance of the ILs containing a diphenylphosphate (DPP) anion all showed low wear, as did some of the tris(pentafluoroethyl)trifluorophosphate (FAP) and bis(trifluoromethanesulfonyl)amide (NTf2) anion containing ILs. However, in the case of the FAP and NTf2 based systems, a cation dependence was observed, with relatively poor wear resistance obtained in the case of an imidazolium FAP and two pyrrolidinium NTf2 salts, probably due to tribocorrosion caused by the fluorine reaction with the aluminium substrate. The systems exhibiting poor performance generally had a lower viscosity, which also impacts on their tribological properties. Those ILs that exhibited low wear were shown to have formed protective tribofilms on the aluminium alloy surface.
History
Journal
Physical chemistry chemical physicsVolume
14Issue
22Pagination
8224 - 8231Publisher
R S C PublicationsLocation
Cambridge, EnglandISSN
1463-9076eISSN
1463-9084Language
engPublication classification
C1 Refereed article in a scholarly journalUsage metrics
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