NEOPENTYL POLYOL ESTERS FOR JET ENGINE LUBRICANTS-EFFECT OF TRICRESYL PHOSPHATE ON THERMAL STABILITY AND CORROSIVITY

Abstract

Chrome-alloy steel AMS-5504 and mild steel promote thermal decomposition of most neopentyl polyol ester base stocks and some Specification MIL-L-23699 lubricant formulations at 500F. Without metals, these esters are stable at this temperature. A few such polyol ester base stocks show a much lower sensitivity to steel at 500F; these exceptions are attributed to the effect of as yet unidentified components. Tricresyl phosphate (TCP) in 1 to 5 percent concentration effectively stabilizes metal-sensitive polyol esters by passivating the active metal surfaces. As in the case of the diester oils, the combination of TCP and water promotes ester hydrolysis and lead corrosivity; this hydrolytic degradation is inhibited by suitable aliphatic amines.

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Document Details

Document Type
Technical Report
Publication Date
Feb 15, 1968
Accession Number
AD0669432

Entities

People

  • H. Ravner
  • R. L. Cottington

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Body Weight
  • Carboxylic Acids
  • Chemical Synthesis
  • Chemistry
  • Coatings
  • Corrosion Resistance
  • Decomposition
  • Diffraction
  • Electron Diffraction
  • Films
  • Gas Turbines
  • Impurities
  • Jet Engines
  • Materials
  • Substrates
  • Turbines
  • Viscosity Index

Readers

  • Organic Chemistry
  • Surface Coatings Technology.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).