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考察高碱性磺酸盐对磺酸钙复合润滑脂的影响：物理化学、流变学及摩擦学性能的增强

Investigating the effect of overbased sulfonates on calcium sulfonate complex grease: enhancements in physicochemical, rheological, and tribological properties.

作者信息

Zheng Ming, Ren Guanlin, Wang Siyuan, Li Yulong, Xing Mingcai

机构信息

Hunan University, State Key Laboratory of Advanced Design and Manufacture for Vehicle Body Changsha 410082 PR China

Institute for Applied Materials-Reliability and Microstructure IAM-ZM, MicroTribology Center μTC, Karlsruhe Institute of Technology KIT Straße Am Forum 7 Karlsruhe 76131 Germany.

出版信息

RSC Adv. 2024 Oct 18;14(45):32992-33006. doi: 10.1039/d4ra04307c. eCollection 2024 Oct 17.

DOI:10.1039/d4ra04307c
PMID:39429927
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11488185/
Abstract

Overbased sulfonate plays a crucial role in calcium sulfonate complex grease, significantly impacting the grease's performance characteristics. Herein, the calcium sulfonate complex grease was formulated using overbased calcium sulfonate (T106D) and overbased magnesium sulfonate (T107) in ratios of 1 : 2, 1 : 1, and 2 : 1, labeled as CMSCG (1 : 2), CMSCG (1 : 1), and CMSCG (2 : 1), respectively. This study examined the effects of overbased sulfonates on the physicochemical, anti-corrosion, rheological, and tribological properties of the grease. Results showed that CMSCG (1 : 2) exhibited superior physicochemical properties, with the highest dropping point (354 °C), the lowest penetration (161 (0.1 mm)), and the least oil separation (1.25%). Exposure to a salt spray environment significantly altered the grease's rheological properties. The combination of T106D and T107 enhanced the corrosion resistance of the grease, attributed to the formation of a corrosion inhibition layer. Incorporating T107 increased both the yield stress and hysteresis area of the calcium sulfonate complex grease. The CMSCG (1 : 2), CMSCG (1 : 1), and MSCG showed the high thixotropic ring area, indicating the poor thixotropy. The calcium sulfonate complex grease formulated with T107 showed the highest yield stress (558 Pa). The friction mechanism revealed that MSCG showed the optimal friction reduction properties, and CMSCG (1 : 1) demonstrated the optimal wear resistance, which are attributed to the synergistic effects of tribo-chemical films composed of CaO, CaCO, FeSO, MgCO, and iron oxide.

摘要

高碱性磺酸盐在磺酸钙复合润滑脂中起着关键作用，对润滑脂的性能特性有显著影响。在此，使用比例为1∶2、1∶1和2∶1的高碱性磺酸钙（T106D）和高碱性磺酸镁（T107）配制磺酸钙复合润滑脂，分别标记为CMSCG（1∶2）、CMSCG（1∶1）和CMSCG（2∶1）。本研究考察了高碱性磺酸盐对润滑脂的物理化学、防腐、流变和摩擦学性能的影响。结果表明，CMSCG（1∶2）表现出优异的物理化学性能，滴点最高（354℃），针入度最低（161（0.1mm）），析油最少（1.25%）。暴露于盐雾环境会显著改变润滑脂的流变性能。T106D和T107的组合增强了润滑脂的耐腐蚀性，这归因于形成了缓蚀层。加入T107增加了磺酸钙复合润滑脂的屈服应力和滞后面积。CMSCG（1∶2）、CMSCG（1∶1）和MSCG的触变环面积较大，表明触变性较差。用T107配制的磺酸钙复合润滑脂屈服应力最高（558Pa）。摩擦机理表明，MSCG表现出最佳的减摩性能，CMSCG（1∶1）表现出最佳的耐磨性能，这归因于由CaO、CaCO、FeSO、MgCO和氧化铁组成的摩擦化学膜的协同作用。

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