THE EFFECT OF LUBRICANT ADDITIVES ON THE DURABILITY OF PLATINUN OXIDISING CATALYSTS

The presence of a metal such as calcium or zinc in a lubricant appears to inhibit the poisoning effect of phosphorus on platinum oxidising catalysts. This is a general conclusion from rig, engine and vehicle tests on lubricants with different additive components. Among the test results reported, a lubricant blend with 2.5% by weight ZDDP (0.22% wt Zn) and another blend with 1.25% wt ZDDP plus enough phosphorous containing ashless anti-oxidant to double the phosphorous content of the lubricant both gave satisfactory performance in terms of catalyst degradation. /GMRL/

  • Corporate Authors:

    Society of Automotive Engineers

    400 Commonwealth Drive
    Warrendale, PA  USA  15096
  • Authors:
    • Fitzerald, W
    • Wilson, JKD
  • Publication Date: 1975-2

Media Info

  • Pagination: 10 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00098959
  • Record Type: Publication
  • Report/Paper Numbers: SAE #750447
  • Files: TRIS
  • Created Date: Oct 18 1975 12:00AM