International Science Index


Phosphorus Reduction in Plain and Fully Formulated Oils Using Fluorinated Additives

Abstract:The reduction of phosphorus and sulfur in engine oil are the main topics of this paper. Very reproducible boundary lubrication tests were conducted as part of Design of Experiment software (DOE) to study the behavior of fluorinated catalyst iron fluoride (FeF3), and polutetrafluoroethylene or Teflon (PTFE) in developing environmentally friendly (reduced P and S) anti-wear additives for future engine oil formulations. Multi-component Chevron fully formulated oil (GF3) and Chevron plain oil were used with the addition of PTFE and catalyst to characterize and analyze their performance. Lower phosphorus blends were the goal of the model solution. Experiments indicated that new sub-micron FeF3 catalyst played an important role in preventing breakdown of the tribofilm.
[1] Elsenbaumer, R. L., Aswath, P. B., Nehme, G. (2003), "High Performance Lubricants and Coatings by Catalyzed PTFE Modification of the Metal Surfaces", University of Texas at Arlington and Platinum Research Cooperation in European Coating Conference: Smart Coatings II Berlin Germany: Vincentz Verlag KG. pp. 1-10.
[2] Nehme, G. N. (2010), "Interaction of Fluorinated catalyst with plain ZDDP oil and commercial oil using 2 rpm cycles testing and DOE analysis under extreme boundary lubrication", STLE 2010- 41044, STLE/ASME International joint Tribology Conference, STLE, San Francisco, California.
[3] Nehme, G. N., and Dib, M. (2010), "Optimization of Mechanism of Boundary Lubrication in Fully Formulated Commercial Engine Oil Using Design of Experiment", Tribology Transactions, 54, 2, pp.208- 226.
[4] Nehme, G. (2011), "The Tribological Performance of Plain and Fully Formulated Commercial Engine Oil under 2 Different Rotational Speeds and Extreme Pressure Contact Using Design of Experiment", Tribology Transactions 54,4, pp. 568-588.
[5] B.A. Khorramian, G.R. Iyer, S. Kodali, P. Natarajan, R. Tupil, “Review of antiwear additives for crankcase oils”, Wear, 169 (1), (1993), 87-95.
[6] Nehme, G. N. (2011), "Interactions of fluorinated catalyst and polutetrafluoroethylene in two different plain zinc dialkyldithiophosphate oils and one fully formulated oil using design of experiment", Lubrication Science, 23, 4, pp.181-201.
[7] Nehme, G. N. (2011), "Fluorinated FeF3 catalyst interactions in three different oil formulations using design of experiment optimization and chemistry characterization of tribofilms", Lubrication Science, 23, 4, June 2011, Pages: 153-179.
[8] Nehme, G. N., Dib, M. (2011), "Fluorinated mix in plain ZDDP oil and commercial oil using design of experiment analysis of all interactions and fundamental study of fluorinated mix in plain ZDDP oils under 2 different r/min test cycles and extreme boundary lubrication", Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 225, 4, pp. 193-211.
[9] Nehme, G. N. (2012), "The Effect of FeF3/TiF3 catalysts on the Thermal and Tribological performance of Plain Oil ZDDP under Extreme Pressure Loading", Wear, 278-279, pp. 9-17.
[10] Oliver W.C., and Pharr, G.M. (1992), "An improved technique for determining hardness and elastic modulus using load displacement sensing indentation experiments", J. Mater. Res. 7, pp. 1564-1583.
[11] P.A. Willermet, D.P. Dailey, R.O. Carter III, P.J. Schmitz and W. Zhu. “Mechanism of formation of antiwear films from zinc dialkyldithiophosphate” Tribology International, 28(3), (1995), pp. 177- 87.
[12] J-M Martin, C. Grossiord, T. LeMogne and J. Igarashi, “Transfer films and friction under boundary lubrication”, Wear, 245 (2000), pp. 107- 115.
[13] G.C. Smith and J.C. Bell, “Multi-technique surface analytical studies of automotive anti-wear films” Appl. Surface Science, 144-145 (1999), p. 222-7.