Antiwear (AW) films, generated from a mineral base oil containing zinc dialkyl dithiophosphate (ZDDP) additive, were extensively studied. These films were formed at various conditions such as different temperatures, various loads and rubbing times. The surface morphology of these films was investigated using atomic force microscopy (AFM) and the surface roughness of these films has been calculated from the images. X-ray absorption near edge structure (XANES) spectroscopy has been used to characterize the chemistry of these films. The intensity of phosphorus K-edge was also used to monitor the thickness of these films. Phosphorus L-edge spectra show that these films have slightly variable chemical natures. 31P Nuclear magnetic resonance (31P NMR) was used to study the ZDDP components in the residue oils. The spectra show that the primary and secondary ZDDP decompose quite differently at the various conditions. Tribological characteristics of these AW films were probed by measuring the coefficients of friction and the wear scar width of the counter faces.
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ASME/STLE 2007 International Joint Tribology Conference
October 22–24, 2007
San Diego, California, USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4810-8
PROCEEDINGS PAPER
Studies on ZDDP Anti-Wear Films Formed Under the Different Conditions by XANES Spectroscopy, Atomic Force Microscopy and 31P NMR
Yue-Rong Li,
Yue-Rong Li
The University of Western Ontario, London, ON, Canada
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Gavin Pereira,
Gavin Pereira
The University of Western Ontario, London, ON, Canada
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Masoud Kasrai,
Masoud Kasrai
The University of Western Ontario, London, ON, Canada
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Peter R. Norton
Peter R. Norton
The University of Western Ontario, London, ON, Canada
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Yue-Rong Li
The University of Western Ontario, London, ON, Canada
Gavin Pereira
The University of Western Ontario, London, ON, Canada
Masoud Kasrai
The University of Western Ontario, London, ON, Canada
Peter R. Norton
The University of Western Ontario, London, ON, Canada
Paper No:
IJTC2007-44218, pp. 93-95; 3 pages
Published Online:
March 23, 2009
Citation
Li, Y, Pereira, G, Kasrai, M, & Norton, PR. "Studies on ZDDP Anti-Wear Films Formed Under the Different Conditions by XANES Spectroscopy, Atomic Force Microscopy and 31P NMR." Proceedings of the ASME/STLE 2007 International Joint Tribology Conference. ASME/STLE 2007 International Joint Tribology Conference, Parts A and B. San Diego, California, USA. October 22–24, 2007. pp. 93-95. ASME. https://doi.org/10.1115/IJTC2007-44218
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