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Tribofilms Generated From ZDDP and DDP on Steel Surfaces: Part 2 — Chemistry

[+] Author Affiliations
Z. Zhang, M. Kasrai, G. M. Bancroft, X. Liu, M. E. Fleet

University of Western Ontario, London, ON, Canada

E. S. Yamaguchi

Chevron Oronite Company LLC, Richmond, CA

Paper No. WTC2005-63251, pp. 619-620; 2 pages
  • World Tribology Congress III
  • World Tribology Congress III, Volume 1
  • Washington, D.C., USA, September 12–16, 2005
  • Conference Sponsors: Tribology Division
  • ISBN: 0-7918-4201-0 | eISBN: 0-7918-3767-X
  • Copyright © 2005 by ASME


The chemical constitution of tribofilms, generated from zinc dialkyldithiophosphate (ZDDP) and ashless dialkyldithiophosphate (DDP), has been examined by X-ray Absorption Near Edge Structure (XANES) spectroscopy. The identification of spectral features and interpretation of the results for P, O, Fe, and S species are given, allowing an overall mechanism to be deduced. The role of Fe in these films was investigated in some detail using P L-edge, O K-edge and Fe L-edge XANES spectra.

Copyright © 2005 by ASME



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