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Imidazolium ionic liquids (ILs) containing sterically hindered phenol and benzotriazole groups were synthesized and evaluated as combined antiwear (AW), antioxidation, and anticorrosion additive in poly(ethylene glycol) (PEG) for steel/steel contacts at room temperature and 100°C. The physical properties of the synthetic ILs and PEG with the additive were measured. The antioxidation and anticorrosion...
AISI 52100 steel was treated by means of plasma nitriding and exhibited remarkable friction stabilization when sliding against AISI 52100 steel under lubrication conditions with alkyl naphthalene, compared with heat quenched and untreated samples. In the presence of lubricant additives, ZnDDP and PN (amine salt of alkoxyl phosphate), the system displayed excellent friction steady-state and low friction...
A series of long-chain 1,3-dialkyl imidazolium ionic liquids (ILs) were synthesized and evaluated as lubricants for steel–steel contacts both at room temperature and 150°C. Relationship between the alkyl chain length and the tribological properties of the ILs was investigated in detail. The results indicated that the ILs bearing long alkyl side chains have excellent friction-reducing and anti-wear...
A series of asymmetrical tetraalkylphosphonium ionic liquids were synthesized and evaluated as a new kind of lubricant for the contacts of steel/Al using an Optimol SRV oscillating friction and wear tester in ambient condition. The phosphonium ionic liquid shows excellent tribological performance and is superior to the conventional ionic liquids 1-ethy-3-hexylimidazolium hexafluorophosphate (P206)...
Novel ionic liquid materials based on 1-alkyl-4-[5-(alkylsulfanyl)-1,3,4-oxadiazol-2-yl] pyridinium tetrafluoroborate derivatives were synthesized. Ultra-thin ionic liquid films were prepared on silicon wafers by means of spin-coating and their tribological properties were investigated. The wear life increases when the chain length decreases. Under low load, they show good tribological properties...
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