Testing the Degradation of Lubricants Using Normalized Time-Resolved Fluorescence Spectral Subtraction

2004-01-2021

06/08/2004

Event
2004 SAE Fuels & Lubricants Meeting & Exhibition
Authors Abstract
Content
A new method of Normalized Time-Resolved Fluorescence Spectral Subtraction (NTRFSS) was used to determine the degradation of lubricating oils. The method relied on measuring the laser-induced time-resolved fluorescence (TRF) spectra of the degraded oils at successive narrow time-gates within the temporal span of the laser pulse and subtracting them from the corresponding spectra of their neat samples. Contour maps were then constructed from the resulting TRF spectral subtraction to act as accurate indicators of the degradation conditions of the oils. Tests were conducted on an automobile lubricant at different degradation stages and also on a gas turbine lubricant. The results showed that the shapes of the NTRFSS contours were very sensitive to the degradation condition and also to the type of the lubricant used. The method is totally non-destructive and provides an enhancement over our recently introduced technique1 in terms of the distinguishing ability between degraded oils.
Meta TagsDetails
DOI
https://doi.org/10.4271/2004-01-2021
Pages
7
Citation
Hegazi, E., "Testing the Degradation of Lubricants Using Normalized Time-Resolved Fluorescence Spectral Subtraction," SAE Technical Paper 2004-01-2021, 2004, https://doi.org/10.4271/2004-01-2021.
Additional Details
Publisher
Published
Jun 8, 2004
Product Code
2004-01-2021
Content Type
Technical Paper
Language
English