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Capacity of selected ionic liquids as alternative EP/AW additive
Author(s) -
Schneider Ameneh,
Brenner Josef,
Tomastik Christian,
Franek Friedrich
Publication year - 2010
Publication title -
lubrication science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.632
H-Index - 36
eISSN - 1557-6833
pISSN - 0954-0075
DOI - 10.1002/ls.120
Subject(s) - ionic liquid , tribology , x ray photoelectron spectroscopy , materials science , base oil , ionic bonding , chemical engineering , chemistry , composite material , ion , organic chemistry , engineering , scanning electron microscope , catalysis
In this paper, it is shown that specific ionic liquids have great potential to be used as additives for tribological applications. The results promise a high load carrying capacity; especially for the cation 3‐Octhylthiazolium and long term stability up to temperatures of 120°C is given. However, only extreme pressures/anti‐wear properties are examined in detail with the selected test method. Friction modifier (FM) effectiveness cannot easily be demonstrated, because of the good performance of the selected base stock. Nevertheless, ionic liquids in general did not change the FM characteristic of the base oil in a negative way. A promising potential for ionic liquids to replace a majority of additives in tribological systems is given. Methods used are Schwing‐Reib‐Verschleiß test according to DIN ASTM D 5706, and Four Ball Tests according to DIN 51360. Mechanisms related to additives in lubricants are investigated by X‐ray photoelectron spectroscopy. Copyright © 2010 John Wiley & Sons, Ltd.