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Lubricants 2013, 1(2), 48-60; doi:10.3390/lubricants1020048

Interaction between Lubricants Containing Phosphate Ester Additives and Stainless Steels

Department of Chemistry, University of Dayton, 300 College Park, Dayton, OH 45469-2357, USA
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Received: 6 April 2013 / Revised: 16 April 2013 / Accepted: 25 April 2013 / Published: 17 May 2013
(This article belongs to the Special Issue Additives for Lubricants)
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Abstract

One way to improve fuel efficiency in today’s jet aircraft engines is to create an environment for higher operating temperatures and speeds. New and improved lubricants and bearing materials must be developed to remain stable in these elevated operating temperatures. Three lubricants, with varying amounts of tricresyl phosphate added as an anti-wear/extreme pressure additive were tested on two different stainless steels at varying temperatures ranging from 300 °C to 350 °C in vacuum. Significant decomposition of the lubricant base-stocks and the phosphate ester additive did occur in most of the trials resulting in the formation of carboxylic acids and phenols. In these cases a film containing phosphorus was deposited onto the stainless steel substrate.
Keywords: 440C Stainless Steel; phosphate ester; surface deposition; synthetic lubricant; decomposition 440C Stainless Steel; phosphate ester; surface deposition; synthetic lubricant; decomposition
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Johnson, D.W.; Bachus, M.; Hils, J.E. Interaction between Lubricants Containing Phosphate Ester Additives and Stainless Steels. Lubricants 2013, 1, 48-60.

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