Gravimetric Determination of Sediment in Turbine Engine Lubricating Oils.
Technical rept. Mar 74-Oct 74,
AIR FORCE AERO PROPULSION LAB WRIGHT-PATTERSON AFB OHIO
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This program was conducted to establish the usefulness of gravimetric filtration for the quantitative determination of the total combustible and noncombustible sediment present in aircraft turbine engine lubricating oils. Both MIL-L-7808 and MIL-L-23699 lubricants were investigated. These lubricants were filtered through various pore size cellulose and silver membrane filters. The amount of sediment was determined by weight difference. Non-combustible sediment was determined by igniting the test filter in a muffle furnace and weighing the amount of sediment remaining after ignition. Overall results of this work show that current synthetic lubricating fluids contain less than 10 mgm1 of total sediment. Total sediment values of both MIL-L-23699 and MIL-L-7808 oils were found to be uniformly low in most instances. However, some MIL-L-7808 formulations were non-filterable at room temperature. When these oils were heated to 140 F, they easily passed through a silver membrane filter. A test procedure for the gravimetric measurement of particulate contamination in turbine engine lubricating oils is proposed. Author
- Organic Chemistry
- Jet and Gas Turbine Engines