The Antiwear Effectiveness of Micellar Zinc Phosphates and Copper Oxide Through Friction-Induced Cross-Linking
Pawlak, Zenon, Kosse, Vladis, Oloyede, Adekunle, Rauckyte, Teresa, Kopkowski, Andrzej, Hargreaves, Douglas J., Pai, Raghuvir B., & Macintosh, David (2006) The Antiwear Effectiveness of Micellar Zinc Phosphates and Copper Oxide Through Friction-Induced Cross-Linking. In Hargreaves, Douglas J., Kosse, V., & Tan, A. (Eds.) Austrib 06 - International Tribology Conference, 3 - 6 December 2006, Brisbane.
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Abstract
Effectiveness of micellar copper oxide and zinc
phosphates as antiwear additives in mineral
oil has been investigated as a function of their
disintegration in tribochemical processes. The
use of copper tribofilm coating can provide
reasonable very low wear and friction
coefficient. The mechanism of wear reduction
by micellar copper oxide is based on the
formation of metallic copper durable film on
the rubbing steel surface during following
tribochemical reaction: Cu2+ + 2etribo ->
Cu0. This phenomen is named selective
transfer. As an effect of the given above
reaction, decrease in the concentration of
copper and of the other metals, e.g., iron, in
oil formulation is observed. Other process
responsible for formation of metallic copper is
proposed: 2Fe+2 (or Fe0) + 3CuO +
2H2O -> Fe2O3 + 3 Cu0 + 4H+.
Zinc phosphates as micellar [Zn(PO3)2] hardcore
reverse micelles (RMs) are directly
introduced in the sliding contact and undergo
physicochemical changes during the film
build-up. Consequently, tribochemical
reaction with zinc phosphate RMs and iron
oxide, through friction-induced cross-linking
processes, takes place: [Zn(PO3)2l(RMs) +
2FeO -> Fe2Zn(PO4)2
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| ID Code: | 10908 |
|---|---|
| Item Type: | Conference Paper |
| Additional URLs: | |
| Keywords: | Friction induced cross linking, lubrication |
| Subjects: | Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Mechanical Engineering not elsewhere classified (091399) |
| Divisions: | Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering |
| Copyright Owner: | Copyright 2006 (please consult author) |
| Deposited On: | 27 Nov 2007 |
| Last Modified: | 29 Feb 2012 23:22 |
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