Accession Number : ADA132226

Title :   Storage of Synthetic Turbine Lubricants under Adverse Conditions.

Descriptive Note : Final rept. Jun 79-Oct 80,


Personal Author(s) : Smith,Hoover A ; Schumacher,M A

PDF Url : ADA132226

Report Date : Apr 1983

Pagination or Media Count : 60

Abstract : The stability of six turbine lubricants consisting of four MIL-L-7808 fluids, one MIL-L-23699 fluid, and one MIL-L-7808 fluids containing a corrosion inhibitor with all being stored under adverse conditions were investigated. Conditions of storage consisted of both sealed containers and open containers exposed to free water of high humidity for periods up to 16 months. Effects of microorganisms were also investigated. Lubricant was periodically examined for changes in appearance, odor, total acid number values, Complete Oil Breakdown Rate Analyzer (COBRA) values and microscopic examination for microbiological activity. This study has shown that the two parameters most effecting long-term storage of turbine lubricants are temperature and free water or high humidity. As the storage temperature increases, the rate of lubricant hydrolysis rapidly increases with hydrolysis being the major mechanism for lubricant degradation under these conditions. One MIL-L-7808 fluid showed superior stability in comparison to the other fluids but not of sufficient degree to provide 16 months storage under high moisture conditions at 100 deg F. Microbiological activity did not effect the rate of lubricant degradation significantly.

Descriptors :   *Storage, *Lubricants, *Oils, Turbines, Adverse conditions, Hydrolysis, Stability, Degradation, High humidity, Moisture, Synthetic fuels, Containers, Sealed systems

Subject Categories : Fuels
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE