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Advances in Tribology
Volume 2012, Article ID 926870, 7 pages
Research Article

Surface Chemistry of Aluminium Alloy Slid against Steel Lubricated by Organic Friction Modifier in Hydrocarbon Oil

Department of Chemistry and Bioengineering, Faculty of Engineering, Iwate University, Moriola 020-8551, Japan

Received 26 June 2011; Revised 26 September 2011; Accepted 20 October 2011

Academic Editor: Satish V. Kailas

Copyright © 2012 Ichiro Minami and Ayumi Sugibuchi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The lubrication mechanism of aluminium alloy slid against steel was investigated from the standpoint of surface chemistry. Low friction and low wear were observed using glycerol mono-olate in a hydrocarbon as lubricant. Increase in the silicon content in the aluminium alloy during rubbing was observed by surface analyses using (1) Auger electron spectroscopy, (2) scanning electron microscopy along with energy dispersive X-ray spectroscopy, and (3) X-ray photoelectron spectroscopy. Mild removal of the passive state (aluminium oxide) from the uppermost surface by the additive during the running-in process was proposed as the lubrication mechanism. The importance of additive chemistry that improves the running-in process was pointed out.