Accession Number : ADA301987

Title :   Evaluation of Corrosiveness, Oxidation, and Wear Properties of Hydraulic and Recoil Fluids.

Descriptive Note : Interim rept. Jul 92-Jan 95,

Corporate Author : SOUTHWEST RESEARCH INST SAN ANTONIO TX TARDEC FUELS AND LUBRICANTS RESEARCH F ACILITY

Personal Author(s) : Lacey, P. I. ; Naegeli, D. W. ; Wright, B. R.

PDF Url : ADA301987

Report Date : NOV 1995

Pagination or Media Count : 88

Abstract : This document outlines a laboratory study to define the interrelated parameters of degradation and wear of contacts lubricated with various hydraulic fluids, with particular reference to chlorotrifluoroethylene (CTFE). The results rank the likely wear, corrosiveness, and oxidation properties of CTFE in comparison to currently used silicone-, polyalphaolefin-, and mineral oil-based fluids. articular attention was given to the metallurgy of critical components specific to the gun recoil brake mechanism. In general, the antiwear characteristics of the CTFE fluid were found to be similar to those of petroleum but marginally inferior to polyalphaolefin-based oils. However, CFTE produced severe corrosion of each of the major components in brass at temperatures above approximately 135 deg C. As a result, operation at very high temperatures is likely to cause unacceptable material removal from copper-based metallurgies. The report also details the results of tests performed to define the lubricating characteristics of a low viscosity polyalphaolefin-based single hydraulic fluid, intended to allow operation in low temperatures. The results indicate good boundary lubricating characteristics with the expected reduction in hydrodynamic lift. jg p3

Descriptors :   *CORROSION, *OXIDATION, *LUBRICATION, *WEAR RESISTANCE, *RECOIL MECHANISMS, *HYDRAULIC FLUIDS, TEST AND EVALUATION, LOW TEMPERATURE, REMOVAL, DEGRADATION, INTERACTIONS, MATERIALS, HIGH TEMPERATURE, COPPER, FLUIDS, OILS, LIFT, HYDRODYNAMICS, BRAKES, MINERALS, CRITICALITY(GENERAL), PETROLEUM PRODUCTS, METALLURGY, RANK ORDER STATISTICS, CHLORINE TRIFLUORIDE, ETHYLENES, BRASS, GUN COMPONENTS.

Subject Categories : Lubricants and Hydraulic Fluids
      Inorganic Chemistry
      Organic Chemistry
      Physical Chemistry
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE