The Intrinsic Relationship Between Color Variation and Performances of
the Deteriorated Aviation Lubrication Oil
- Jun Ma,
- Shaojun Ruan,
- Jianqiang Hu,
- Yuanbao Sun,
- Yiwei Fei,
- Xufeng Jiang,
- Shibao Dong,
- Teng Chen,
- Nan Wu
Abstract
Dose the blackened lubrication oil needs to be replaced for flying
safety? Since there is very limited room for inaccurate assessment of
oil quality due to strict flying safety standards, much aviation
lubrication oil is disposed in advance long before their service life.
More important, aircrafts still face the fatal challenges from
unpredictable lubrication oil deterioration. Color change is surely a
significant signal to diagnose the quality of lubrication oils. Based on
the colorimeter, the color numbers of the testing lubrication oils are
measured in this paper to identify the color variation degree of the
oxidized lubrication oils. Then the molecular structures of the oxidized
lubrication oils are investigated to find the intrinsic relationship
between the oxidation products and color numbers. Based on key
performances of the oxidized oil samples, the oil quality is
undoubtfully deteriorated which is coincident with the variation of
color number. The color numbers of the used aviation lubrication oils
could provide an alternative way to readily and quickly measure the
decline degree and residual lifetime.