A comparison of phosphorus and fluorine containing IL lubricants for steel on aluminium

Physical Chemistry Chemical Physics : PCCP
Anthony E SomersMaria Forsyth

Abstract

Ionic 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 (NTf(2)) anion containing ILs. However, in the case of the FAP and NTf(2) based systems, a cation dependence was observed, with relatively poor wear resistance obtained in the case of an imidazolium FAP and two pyrrolidinium NTf(2) 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.

References

Sep 21, 2002·Chemical Communications : Chem Comm·C YeL Yu
Feb 17, 2006·Nature·Martyn J EarleJason A Widegren
Feb 11, 2010·Physical Chemistry Chemical Physics : PCCP·Douglas R MacFarlaneMaria Forsyth
Feb 11, 2010·Physical Chemistry Chemical Physics : PCCP·Frank EndresSherif Zein El Abedin
Feb 11, 2010·Physical Chemistry Chemical Physics : PCCP·M BrettholleF Endres
May 4, 2010·ACS Applied Materials & Interfaces·Jim EfthimiadisMaria Forsyth

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Citations

Jun 28, 2016·ACS Applied Materials & Interfaces·Tulia EspinosaMaría-Dolores Bermúdez
Dec 30, 2016·Chemical Reviews·Shiguo ZhangYouquan Deng
Jan 9, 2015·Physical Chemistry Chemical Physics : PCCP·David A BeattiePatryk Wąsik
Jul 6, 2014·Physical Chemistry Chemical Physics : PCCP·James SweeneyRob Atkin
Nov 3, 2020·Chemical Society Reviews·Meirong CaiFeng Zhou
Apr 4, 2021·Materials·Bodhi R ManuAhalapitiya H Jayatissa
Apr 24, 2015·ACS Applied Materials & Interfaces·Ana Eva JiménezMaría-Dolores Bermúdez

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