硫代磷酸酯在不同基础油中减摩抗磨性能的研究

摘要

In this report, friction-reducing and anti-wear properties of four kinds of thiophosphate in different base oils were investigated us-ing infrared (IR), CETR UMT-3 Multi-Specimen Test System, Scanning electron microscope (SEM). The results show that friction-reducing property of thiophosphate was much better in Yubase 6 and PAO base oils. Anti-wear property of thiophosphate in Yubase 6 is superior to that in PAO and PAG. The adsorption behavior of thiophosphate on stainless steel surface in hexane and ethanol was investigated using a Quartz Crystal Microbalance with Dissipation monitoring (QCM-D). The adsorption film of thiophosphate in hexane was much more stable. It's not easy to desorb for thiophosphate in hexane. Thus, friction-reducing and anti-wear properties of thiophosphate in mineral oil was better.%通过扫描电镜(SEM)和摩擦试验机(UMT-3)等测试手段,详细考察了四种硫代磷酸酯添加剂在不同基础油中的减摩抗磨性能.基础油分别是三类加氢矿物油Yubase 6,聚α烯烃(PAO)和聚亚烷基二醇(PAG).研究结果表明:硫代磷酸酯添加剂在矿物油和PAO中表现出更好的减摩性能;硫代磷酸酯在矿物油中的抗磨性能要优于PAO和PAG.采用正庚烷和乙醇分别模拟非极性油和极性油,通过耗散型石英单晶微天平(QCM-D)考察了硫代磷酸酯在不锈钢表面的吸附行为,发现硫代磷酸酯在正庚烷体系中形成的吸附膜更加稳定可靠,不易脱附,因此硫代磷酸酯在矿物油中的减摩抗磨性能更佳.