Please use this identifier to cite or link to this item: doi:10.22028/D291-27884
Title: Influence of Water on Tribolayer Growth When Lubricating Steel with a Fluorinated Phosphonium Dicyanamide Ionic Liquid
Author(s): Urtis, Luigi A.
Arcifa, Andrea
Zhang, Peng
Du, Junxiao
Fantauzzi, Marzia
Rauber, Daniel
Hempelmann, Rolf
Kraus, Tobias
Rossi, Antonella
Spencer, Nicholas D.
Language: English
Title: Lubricants
Volume: 7
Issue: 3
Publisher/Platform: MDPI
Year of Publication: 2019
Free key words: Ionic liquids
lubrication small-area X-ray photoelectron spectroscopy
DDC notations: 540 Chemistry
600 Technology
660 Chemical engineering
Publikation type: Journal Article
Abstract: This work aims to elucidate the role of environmental humidity on the tribological behavior of steel surfaces lubricated with an ionic liquid comprised of a fluorinated phosphonium cation—tributyl-3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluoro-octyl-phosphonium—and a dicyanamide anion (i.e. N(CN)2 −). Ball-on-disk tribotests were carried out at room temperature and at various levels of relative humidity (RH). Water was found to be required to promote the formation of a tribofilm over the contact area. The reaction layer exhibited a patchy morphology, which resembles that observed formed with conventional antiwear additives such as ZnDTP. A surface-chemical analysis of the tribofilm indicated that the tribofilm is composed of fluorides, oxides, and phosphates, pointing to a stress-induced degradation of the ions and corrosion of the sliding counterparts, which is enabled by the presence of water at the sliding interface.
DOI of the first publication: 10.3390/lubricants7030027
Link to this record: urn:nbn:de:bsz:291--ds-278843
ISSN: 2075-4442
Date of registration: 9-Nov-2020
Description of the related object: Supplementary Materials
Related object: 7/3/27/s1
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Chemie
Professorship: NT - Prof. Dr. Christopher Kay
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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