共查询到20条相似文献,搜索用时 62 毫秒
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合成了润滑油添加剂二丁基二硫代氨基甲酸铋(BiDDC)和二辛基二硫代磷酸铋(BiDDP)。利用四球试验机研究了这两种添加剂在矿物基础油中的极压、抗磨和减摩性能,并与同类金属添加剂进行了比较。结果表明,有机铋添加剂的抗磨减摩性能一般,但具有较好的极压性能,尤其是BiDDC添加剂在最大无卡咬负荷、烧结负荷和综合磨损值上都明显优于BiDDCP和同类金属添加剂。另外,铜片腐蚀试验结果表明该添加剂对金属的腐蚀性较弱。 相似文献
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制备了一种新型无硫磷含氮杂环润滑添加剂月桂酸-N-(喹唑啉-4-酮)甲酯,通过元素分析、FT-IR、13C-NMR对其结构进行了表征,在万能摩擦磨损模拟试验机和环块模拟试验机上评价了其在液体石蜡中的摩擦磨损性能,还考察了其热稳定性能,并采用扫描电子显微镜和光学显微镜观察分析摩擦副磨损表面形貌.结果表明,所制备的月桂酸-N-(喹唑啉-4-酮)甲酯添加剂热稳定性良好,能提高液体石蜡的承载能力,降低工况的磨损和减小摩擦系数,有效提高基础油抗磨减摩性能. 相似文献
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采用不同黏度的基础油制备的复合锂基润滑脂中,加入极压抗磨添加剂,采用四球试验机,改变钢球之间转速,评价润滑脂的抗磨性能,并采用扫描电子显微镜(SEM),分析钢球磨斑的形貌及元素含量.通过对钢球表面温度、磨斑直径、磨斑形貌和磨斑元素组成及含量的分析和比较,考察了基础油的黏度和钢球转速对加入固体和液体添加剂的润滑脂抗磨性能的影响. 相似文献
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制备了一种新型无硫磷的喹唑啉酮胺润滑油添加剂。通过热重试验(TG)和油溶性试验考察了该剂的热稳定性及在液体石蜡基础油中的溶解性,又通过四球试验、抗腐蚀试验和防锈试验考察了其对液体石蜡极压、抗磨、减摩、抗腐蚀和防锈性能的影响。结果表明,该添加剂具有良好的油溶性能和热稳定性能,外推起始热分解温度达240℃;可以明显提高液体石蜡的极压性能,降低磨斑直径和摩擦系数,当添加量为0.5%时,便能将液体石蜡的烧结负荷(PD)由1235 N提高至1568 N;具有优异的抗腐蚀和防锈性能,当添加量为1.0%时,防锈时间>168 h,超过了专属防锈剂T746,因此可以作为多效润滑油添加剂使用。 相似文献
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采用菜籽油与亚磷酸二正丁酯为原料通过自由基加成反应制备了环境友好植物油基润滑油添加剂(PRO)。利用四球试验与SRV微动摩擦磨损试验对比了PRO与磷酸三甲酚酯(TCP)在饱和多元醇酯基础油(3970)中的减摩、抗磨以及极压性能。结果表明,PRO在不同的载荷、浓度、温度等条件下的摩擦学性能均明显优于TCP。PRO优异的摩擦学特性主要得益于其在摩擦过程与金属表面发生摩擦化学反应,生成含有Fe2O3,Fe3O4,FeP与FePO4的边界润滑薄膜,从而起到极压、抗磨的作用。 相似文献
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通过摩擦试验,研究了稀土添加剂对油溶性羧酸铜与二烷基二硫代磷酸锌(T202)极压性能的影响,结果表明:油溶性羧酸铜对T202的极压性能有显著影响,T202与较高剂量铜剂复合皇最大无卡咬负荷明显降低;稀土添加剂与铜剂、T202以适当比例复合,有利于板压性能提高。 相似文献
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ShiPeijing QiaoYulin XuBinshi MaShining 《中国炼油与石油化工》2003,(4):57-62
A new kind of friction-reducing and repairing additive containing nano-scale copper and rare earth compounds were prepared by means of synthesis and compounding methods. The performance of the said additive was investigated by engine bench test, and was compared to the performance of similar domestic and imported additives. The deterioration of lube oils containing additives over different time intervals was studied by means of plasma spectrometry and mass spectrometry, and the effect of additive package on engine power was also studied. Test results have revealed that the synthetic additive package can provide good anti-wear performance to the tribo-pairs. In particular, after 300 hour application of the said additive package the connection rod shaft and copper sleeve showed ““zero wear““ to achieve the in situ dynamic repairing of tribo-pairs. Application of the said synthetic additive can effectively improve the engine power performance and extend the engine service life. 相似文献
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The Friction-Reducing, Antiwear and Antioxidation Properties of an Organo-Molybdenum Lube Additive without Sulfur and Phosphorus 总被引:4,自引:2,他引:2
The engine oil specifications of ILSAC GF - 4 ( implemented 2004 ) and GF - 5 ( expected 2010 ) have in common three important OEM needs: (1) improved fuel economy and its retention, (2) emissions system compatibility (related to phosphorus and sulfur content), and (3) improved oil robustness for extended oil life capability (e. g., reduced high temperature deposits and engine sludge, improved oxidative stability, and better valve train wear protec- tion). For emission systems compatibility, there is a trend towards lower phosphorus and sulfur content in engine oils while maintaining high anti - oxidation and anti - wear performances. In this paper, the friction - reducing, antiwear and antioxidant properties of a sulfurfree and phosphorusfree molybdate ester compound as lubricant additive are discussed. The investigation showed that the molybdate ester enables good frictionreducing ability of the lubricant, and maintains low friction coefficients even after period of severe oil oxidation, which indicates the potential for excellent fuel economy retention in passenger car vehicles. For other organomolybdenum additives, the investigation showed their frictionreducing ability decreased greatly after oxidation of the oil, although the performance appeared to be very good with the fresh oil before aging. In addition, the molybdate ester demonstrated a synergistic effect in anti - wear protection with zinc dialkyl dithiophosphate (ZDDP), a well- known commonly used additive in engine oils; this suggests that excellent wear protection is possible for an engine oil with reduced sulfur and phosphorus content. Moreover, the molybdate ester is also a strong synergist with arylamine antioxidants, which can retard its depletion in oxidized oil, extend its oxidative induction time, and reduce its high temperature deposit - forming tendency. Thus, this type of sulfur - free and phosphorus - free organo- molybdenum lubricant additive truly provides multifunctional performances, reducing friction, wear, and oxidation of an engine oil when combined with other suitable additives. Due to its phosphorus - free, sulfur- free and multifunctional properties, the molybdate ester compound can be extremely useful in formulat- ing modem engine oils with low phosphorus and sulfur content. 相似文献