On-line and off-line techniques for monitoring the thermal and oxidative degradations of aircraft turbine engine oils - Part I: Laboratory evaluations
- Univ. of Dayton Research Inst., Dayton, OH (United States)
This paper presents the results of research to evaluate the feasibility of voltammetric techniques for development into on-line and off-line techniques capable of monitoring the thermal and oxidative degrations of aircraft turbine engine oils. The off-line techniques require less than one milliliter of sample, less than one minute to perform, and very little expertise. The off-line techniques measure the percent of the remaining antioxidant and the conductivity of the oil sample. The on-line techniques require less than 15 seconds to perform, can be performed in static or flowing conditions and can function at operating temperatures up to 300{degrees} C. The on-line techniques measure the electroactivity and the conductivity of the heated oil. The results of this research indicate that both oxidative and thermal degradations of used oils must be monitored to determine the operating conditions of aircraft turbine engines. Oxidative degradation is monitored by determining the percent of remaining antioxidant (off-line) and electroactivity (on-line) of the used oil. Thermal degradation is monitored by determining the conductivity (off-line or on-line) of the used oil. Combined oxidative and thermal degradation evaluations of used oils can be used to predict oil change intervals for normally operating equipment and to detect abnormally operating engines prior to malfunction. 9 refs., 4 figs., 2 tabs.
- OSTI ID:
- 283303
- Journal Information:
- Lubrication Engineering, Vol. 51, Issue 11; Other Information: PBD: Nov 1995
- Country of Publication:
- United States
- Language:
- English
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