Evaluation of molybdate ester as a synergist for arylamine antioxidant in lubricants |
| |
| Authors: | Jian-Qiang Hu Xian-Yong Wei Jun-Bing Yao Li Han Zhi-Min Zong |
| |
| Affiliation: | aSchool of Chemical Engineering, China University of Mining and Technology, Xuzhou 221008, China;bDepartment of Aviation oil, Xuzhou Air Force College, Xuzhou 221000, China;cBeijing Aviation Oil Research Institute, Beijing 100086, China |
| |
| Abstract: | An oil-soluble additive molybdate ester (ME) was synthesized. The antioxidation properties of p,p′-dioctyldiphenylamine (DODPA)- and ME-containing poly-α-olefin (PO)-derived lubricants were evaluated by differential scanning calorimetry (DSC) to measure and hot oil oxidation (HOO) tests. DSC test measures incipient oxidation temperature (IOT) and oxidation induction time (OIT) of the lubricant at high temperatures and the oxidation stability of oil viscosity increase is measured by HOO test. DSC test shows that IOT and OIT of DODPA-containing PO were improved significantly by ME addition. HOO test indicates that when combining with DODPA antioxidants, ME can also effectively reduce the increase in viscosity of the mineral oil 150 SN. These results suggest that the ME shows a good oxidative synergism with DODPA antioxidant. In addition, the changes occurring to DODPA in 150 SN oxidation with and without ME were observed by GC/MS analysis. The proposed mechanism of the inhibition involves a synergy between ME and DODPA. |
| |
| Keywords: | Molybdate ester Additive Antioxidation Synergism Differential scanning calorimetry (DSC) Mass and chromatography (GC/MS) |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
