环烷酸铋与金属减活剂在润滑脂中的协同作用研究

本研究中选择三种金属减活剂：苯并三氮唑类金属减活剂(T551)和噻二唑类金属减活剂(DMTD-8和DMTD-12)，分别与环烷酸铋进行复配，利用铜腐、滴点和锥入度等方法考察复配添加剂对复合锂基脂基本理化性能的影响规律；然后通过摩擦学试验和表面分析等方法深入研究分析复配的添加剂间协同/对抗作用、对复合锂基脂承载能力及减摩抗磨性能的影响规律与作用机理. 结果表明，环烷酸铋和三种金属减活剂的复配添加剂对复合锂基脂的基本理化性能影响较小，三种金属减活剂能够有效抑制环烷酸铋对铜片的腐蚀；环烷酸铋与苯并三氮唑类金属减活剂在极压性能和减摩抗磨性能上几乎没有协同作用，而与噻二唑类金属减活剂的协同作用明显，能够显著提升基础脂的承载能力和减摩抗磨性能，这种优异的协同效果归结于摩擦过程中生成的Fe2O3、Li2O、FeS2和Bi2S3等摩擦化学产物.In this study, three types of metal deactivators were selected: benzotriazole-based metal deactivator (T551) and thiadiazole-based metal deactivators (DMTD-8 and DMTD-12). They were compounded with bismuth naphthenate respectively. The effects of the compounded additives on the basic physicochemical properties of complex lithium grease were investigated via copper corrosion test, dropping point, cone penetration and other methods. Then, the synergistic/antagonistic effects between the compounded additives, as well as the influence rules and action mechanisms of the additives on the load-carrying capacity and friction-reducing and anti-wear performance of complex lithium grease were further studied and analyzed through tribological tests and surface analysis. The results show that the compounded additives of bismuth naphthenate and the three metal deactivators have little effect on the basic physicochemical properties of complex lithium grease. All three metal deactivators can effectively inhibit the corrosion of copper sheets caused by bismuth naphthenate. The compounding of bismuth naphthenate and benzotriazole-based metal deactivator shows almost no synergistic effect in extreme pressure performance, friction-reducing and anti-wear performance, while the compounding with thiadiazole-based metal deactivators exhibits significant synergistic effect, which can significantly improve the load-carrying capacity and friction-reducing and anti-wear performance of the base grease. This excellent synergistic effect is attributed to the tribochemical products such as Fe₂O₃, Li₂O, FeS₂ and Bi₂S₃ generated during the friction process.

搜集汇总

背景与挑战

背景概述

该数据集研究环烷酸铋与金属减活剂（包括苯并三氮唑类和噻二唑类）在复合锂基润滑脂中的协同作用，通过理化性能测试和摩擦学实验分析其影响。结果表明，复配添加剂对润滑脂基本性能影响较小，能有效抑制铜腐蚀，且环烷酸铋与噻二唑类金属减活剂在极压和减摩抗磨方面表现出显著协同效应，提升承载能力，机理涉及Fe2O3、Li2O、FeS2和Bi2S3等摩擦化学产物的生成。