航空润滑油氧化安定性评定指标相互关联性研究

采用腐蚀与氧化安定性试验方法评定航空润滑油的氧化安定性,探索该方法中评定指标的相互关联性。结果表明,腐蚀与氧化安定性试验中航空润滑油总酸值变化、粘度变化率、沉积物生成量的变化趋势三者之间存在一定的相关性,总酸值变化和粘度变化率的变化趋势在一定程度上反映并可预测沉积物生成量的变化趋势;腐蚀与氧化安定性的评定指标之间没有必然的对应性,无法根据某一指标来预测其它指标。差示扫描量热(DSC)双峰法放热峰面积比值变化趋势尚不能较好地预测沉积物生成量的变化趋势。

STUDY ON THE CORRELATIONS OF THE EVALUATION INDEXES IN OXIDATION STABILITY TEST OF TURBINE ENGINE LUBRICANT

The oxidation stability of turbine engine lubricant is evaluated by corrosion and oxidation stability test method. In this paper the correlations of some evaluation indexes including total acid number, viscosity varied rate and the amount of deposits formed are discussed. Test results showed that the variation trends of total acid number and viscosity varied rate could reflect and predict the changing trend of deposits in some extent, yet without positive or quantitative correlations could be used to predict one another. Besides, using DSC two-peak method to predict the formation trend of deposits in oxidation stability test is not mature right now.