Accession Number : AD0286175

Title :   THE EFFECT OF OXIDATION ON GREASE LUBRICITY

Corporate Author : ROCK ISLAND ARSENAL ILL

Personal Author(s) : MURPHY,G.P.

Report Date : 13 JUN 1962

Pagination or Media Count : 1

Abstract : Commercial and experimental greases were subjected to oxidation by means of pressurized oxygen at elevated temperatures under both static and dynamic conditions. Measurements of penetration, neutralization nmber, saponification number, carbonyl oxygen and wear were made on the greases before and after oxidation. T e main results obtained from this study were: (1) an oxidioil type affect the oxidation stability and the amount of oxidative wear, (3) oxidation is accelerated by dynamic conditions, (4) the soap acts as a catalyst to both oxidation and oxidative wear, (5) nongaseous oxidation products formed are organic acids, esters, aldehydes, ketone and oil insoluble resinous materials, aed grease displays greater wear than the o iginal grease and th maximum wear increase occurs at the temperature at which the grease was oxidized, (2) both soap and oil type affect the oxidation stability and the amount of oxidative wear, (3) oxidation is accelerated by dynamic conditions, (4) the soap acts as a catalyst to both oxidation and oxidative wear, (5) nongaseous oxidation products formed are organic acids, esters, aldehydes, ketone and oil insoluble resinous materials, and (6) oxidative wear is caused by an alcohol soluble, readily neutralized material. (Author)

Descriptors :   *GREASES, *LUBRICANTS, *OXIDATION, DECOMPOSITION, DEGRADATION, HIGH TEMPERATURE, INFRARED SPECTROSCOPY, LITHIUM STEARATES, METALLIC SOAPS, MINERAL OILS, STABILITY, TEST METHODS

Distribution Statement : APPROVED FOR PUBLIC RELEASE