Energy Dispersive X-Ray Fluorescence (EDXRF) in Non-Destructive Testing of Oil Samples

Abstract

A rapid non-destructive, multi-elemental and ultra-sensitive analytical technique of engine oil analysis is described. Using" an x-ray excitation source and Si(Li) detector for the1 measurements, the deterioration of an internal combustion engine) is evaluated from results of concentration levels of Ti, Ca, Mn, Cr, Fe, Cu, Zn, Pb and Br. Analysis of these elements from samples of new and used engine oil from a commercial brand showed significant increases in the levels of Fe(164%), Br(5022%) and Pb (65000%) after an engine had run a distance of 1103 km. No major increases were noticed for the other elements. The changes are due to the wear and tear of engine parts and subsequent contamination of the engine oil. The increase of Pb and Br is due to the leakage of exhaust fuel gases from the combustion chambers which indicate the need for new piston rings, for this particular motor car engine.