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Tribofilms Generated From ZDDP and DDP on Steel Surfaces: Part 1 — Growth, Wear and Morphology

[+] Author Affiliations
Z. Zhang, M. Kasrai, G. M. Bancroft

University of Western Ontario, London, ON, Canada

E. S. Yamaguchi

Chevron Oronite Company LLC, Richmond, CA

Paper No. WTC2005-63246, pp. 617-618; 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 growth and morphology of tribofilms, generated from zinc dialkyldithiophosphate (ZDDP) and an ashless dialkyldithiophosphate (DDP) over a wide range of rubbing times (10 seconds to 10 hours) and concentrations (0.1 to 5 wt % ZDDP), have been examined using atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and X-ray absorption near edge structure (XANES) spectroscopy at the O, P and S K-edges, and the P, S, and Fe L-edges. The physical aspects of the growth and morphology of the tribofilms will be presented here (Part I) and the chemistry of the films will be discussed in (Part II).

Copyright © 2005 by ASME



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