The Deterioration Mechanism of Diester Aero Lubricating Oil at High Temperature

Abstract EN

The deterioration of aero lubricating oil at high temperatures was accelerated by using a specific device simulating the operating conditions of engines, where the deterioration mechanism was obtained.

Structures of the deteriorated lubricating oils were analyzed by gas chromatograph/mass spectrometer.

From the results, it can be concluded that deterioration of aero lubricating oil at high temperatures was composed of thermal pyrolysis, oxidation, and polymerization, with the generation of a variety of products, such as alcohols, aldehydes, acids, and esters, which caused the deterioration of physicochemical properties of the aero lubricating oil.