THERMAL STABILITY OF EIGHT HIGH-TEMPERATURE PROPRIETARY FLUIDS.

Abstract

Eight commercial hydraulic fluids recommended for use at high temperature were evaluated for thermal stability in the presence of four metals. Different chemical types of base fluids used in the products included disiloxane, ester, chlorophenyl polysiloxane and polyphenyl ether compounds as well as deep-dewaxed, super-refined mineral oil. After exposure under nitrogen at 650F. for 16 hours, the fluids were examined for changes in color, viscosity, pour point and neutralization number in addition to weight loss, insoluble residue formation and degree of metal attack. The polyphenyl ether showed very little change in measured fluid properties and very little metal attack. With regard to pour point and viscositytemperature properites, the polysiloxanes and disiloxanes all showed low pour points and excellent viscositytemperature characteristics. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 27, 1964
Accession Number
AD0610558

Entities

People

  • R. Lemar

Tags

DTIC Thesaurus Topics

  • Body Weight
  • Fluids
  • High Temperature
  • Hydraulic Fluids
  • Laser Dyes
  • Neutralization
  • Nitrogen
  • Thermal Stability
  • Viscosity

Readers

  • Metallurgy
  • Organic Chemistry
  • Thermal Physics or Thermal Science.