润滑油
聚脲
基础油
润滑
材料科学
摩擦学
腐蚀
复合材料
锂(药物)
矿物油
吸附
氧化物
化学工程
冶金
化学
有机化学
聚氨酯
扫描电子显微镜
医学
内分泌学
工程类
作者
Guanlin Ren,Pengfei Zhang,Xiangyuan Ye,Wen Li,Xiaoqiang Fan,Minhao Zhu
出处
期刊:Friction
[Springer Nature]
日期:2019-12-13
卷期号:9 (1): 75-91
被引量:29
标识
DOI:10.1007/s40544-019-0325-z
摘要
Abstract 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 Fe 2 O 3 , FeO(OH), and nitrogen oxide.
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