Figure 1 The lab-designed aviation lubrication oil comparative oxidation
appliance
The color number of the oxidized oil samples could be measured by the
petroleum products chromometer
(SYD-0168,
Shanghai Jingxi Instruments Co. Ltd.) that follows the petroleum
products color number mensuration standard (SH/T 0168-1992).
Differential Scanning Calorimeter (DSC, PerkinElmer DSC 8000) is applied
to determine the
incipient
oxidation temperature (IOT) of the oxidized oil
samples.
The Gas Chromatography-Mass Spectrometry (GC-MS, PerkinElmer Clarus
680/SQ 8T) in this paper is applied to study the molecular structure of
the products in oxidized oil specimens. The total acid number is tested
according to GB/T 7304-2014 standard by automatic potentiometric
titrator (model: SQ-600), and the antiwear properties of the oxidized
oil samples are tested according to GB/T 3142 standard by four-ball
tester (made in Jinan, model: MRS-10G/P).