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合成了十二烷硫基硼酸镧,利用四球试验机和摩擦磨损试验机评价了其抗磨减摩性能;采用x-射线光电子能谱仪(XPS)分析了磨斑表面主要元素的组成和价态,用扫描电子显微镜(SEM)分析了磨斑表面形貌。试验结果表明:在基础油HVI500中加入2％的十二烷硫基硼酸镧时,油的最大无卡咬负荷P_B值比基础油增大约60％,不同负荷下的摩擦系数也比基础油在400N的低。十二烷硫基硼酸镧具有良好的抗磨减摩性能,其作用机理是添加剂在摩擦过程中发生分解反应,生成的B_2O_3和La_2O_3起抗磨减摩作
The lanthanum dodecylthioborate was synthesized and its antiwear and antifriction properties were evaluated by a four ball tester and a friction and wear tester. The composition and the valence of the major elements on the surface of the spot were analyzed by x-ray photoelectron spectroscopy (XPS) State, with a scanning electron microscope (SEM) analysis of the wear surface morphology. The experimental results show that when adding 2% lanthanum dodecylthioborate into base oil HVI500, the maximum no-card bite load (P_B) of oil increases by 60% compared with that of base oil, and the friction coefficient under different loads is higher than that of base oil 400N low. Lanthanum dodecylthioborate has a good antiwear and antifriction properties. The mechanism of action is that the additive decomposes during the friction process, and the generated B2O3 and La2O3 are antiwear and antifriction