1-Hexyl-3-Methylimidazolium Hexafluorophosphate as Oil Additive for the Lubrication of Steel-Steel Contacts and its Influence on the Running-In and Wear-In Periods

Abstract

The effectiveness of ionic liquids as lubricants or additives has been recently studied for several tribological pairs: steel-steel, aluminium-steel and steel-titanium [1–2]. Likewise other materials used as engineering surfaces like nanocrystalline nickel coating [3], phosphor bronze [4], PVD coatings [5] and many others, have also been lubricated with ionic liquids in recent years. Most of these research studies are typically focused on the utilization of ionic liquids as neat lubricants. However, in economic terms, the use of ionic liquids as oil additives is more convenient because of its high cost.