In this study, lithium complex grease (LCG) and polyurea grease (PUG) were synthesized using mineral oil (500SN) and polyalphaolefin (PAO40) as base oil, adsorbed onto lithium complex soap and polyurea as thickeners, respectively. The effects of grease formulation (thickener and base oil with different amounts (80, 85, and 90 wt%) on the corrosion resistance and lubrication function were investigated in detail. The results have verified that the as-prepared greases have good anti-corrosion ability, ascribed to good salt-spray resistance and sealing function. Furthermore, the increase in the amount of base oil reduces the friction of the contact interface to some extent, whereas the wear resistance of these greases is not consistent with the friction reduction, because the thickener has a significant influence on the tribological property of greases, especially load-carrying capacity. PUG displays better physicochemical performance and lubrication function than LCG under the same conditions, mainly depending on the component/structure of polyurea thickener. The polyurea grease with 90 wt% PAO displays the best wear resistance owing to the synergistic lubrication of grease-film and tribochemical film, composed of Fe₂O₃, FeO(OH), and nitrogen oxide.

在这项研究中，以矿物油（500SN）和聚α-烯烃（PAO40）为基础油合成了锂复合脂（LCG）和聚脲脂（PUG），分别吸附在锂复合皂和聚脲上作为增稠剂。详细研究了润滑脂配方（增稠剂和基础油的含量分别为80、85和90 wt％）对耐蚀性和润滑功能的影响，结果证明所制备的润滑脂具有良好的防腐性能良好的耐盐雾性和密封性能；此外，基础油量的增加在一定程度上降低了接触界面的摩擦，而这些润滑脂的耐磨性与降低摩擦并不一致，因为增稠剂对润滑脂的摩擦学性能（特别是承载能力）有重大影响。在相同条件下，PUG表现出比LCG更好的理化性能和润滑功能，这主要取决于聚脲增稠剂的成分/结构。PAO含量为90％的聚脲润滑脂由于润滑脂膜和摩擦化学膜（由Fe组成）的协同润滑而显示出最佳的耐磨性₂ O ₃，FeO（OH）和氮氧化物。