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将二烷基二硫代磷酸锌(ZDDP)和二烷基二硫代氨基甲酸钼(MoDTC)分别加入聚ɑ-烯烃(PAO)、PAO与分散剂、PAO与酯类油3种试样中,进行四球机抗磨试验,考察ZDDP和MoDTC对不同试样的感受性。将ZDDP和MoDTC两种添加剂进行复配试验,并通过扫描电镜观察磨斑形貌。试验结果表明:酯类油能够很好地提高PAO基础油的抗磨性能,其质量分数为5%~10%时即可达到较好的抗磨性能;PAO与分散剂试样中,增大ZDDP的加入量不能有效地降低磨斑直径,增大MoDTC的加入量可降低磨斑直径;PAO与酯类油试样中,随着ZDDP加入量的增加,磨斑直径减小,ZDDP的抗磨效果优于MoDTC;两种添加剂复配后与单剂相比无明显的增效作用。磨斑形貌分析结果表明:加入MoDTC的基础油试验测得的磨斑表面平整,对摩擦表面修复作用更佳,同时添加ZDDP与MoDTC的基础油,试验测得的表面磨痕不规则,两剂具有竞争关系。 相似文献
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为了考察清净剂对含二烷基二硫代磷酸锌(ZDDP)和二硫代氨基甲酸钼(MoDTC)组合抗磨减摩剂的基础油的影响,将高碱值合成磺酸钙(T106D)、高碱值合成磺酸镁(T107)、高碱值硫化烷基酚钙(T115B)作为清净剂分别按一种或几种添加到含ZDDP/MoDTC的基础油中,对油样进行曲轴箱模拟试验和四球机抗磨试验,并采用高倍扫描电镜(SEM)对油样试验件的钢球表面形貌进行表征。结果表明:曲轴箱模拟试验时间越长,清净剂对基础油的成焦抑制差异越明显,同时添加3种清净剂时ZDDP/MoDTC复配基础油具有最好的清净性,其中含有T107的基础油具有更低的成焦倾向;曲轴箱模拟试验后的油品进行四球机抗磨试验表明,3种清净剂对ZDDP/MoDTC复配基础油抗磨性能影响较小,引起抗磨性能变化的主要原因是MoDTC经高温后的稳定性下降;SEM对钢球表面形貌表征结果表明,清净剂会减弱ZDDP/MoDTC复配基础油对钢球试验件摩擦副表面的润滑修复作用。 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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有机钼添加剂与ZnDDP的抗磨协同性及其作用机理研究 总被引:1,自引:0,他引:1
采用四球机评价了二烷基二硫代磷酸钼(MoDDP)、二烷基二硫代氨基甲酸钼(MoDTC)和非活性有机钼等3种有机钼化合物的抗磨性能,及其与二烷基二硫代磷酸锌(ZnDDP)的抗磨协同效应。结果表明:这3种化合物都具有良好的抗磨性能,尤以MoDDP为最佳;并且与ZnDDP在石蜡基基础油中展现出良好的抗磨协同效应,尤其是MoDTC和非活性有机钼。 相似文献
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利用曲轴箱模拟试验对润滑油添加剂二烷基二硫代氨基甲酸钼(MoDTC)抗氧化性进行考察,采用红外光谱(FT-IR)及能谱分析仪(EDS)对氧化油样和铝板沉积物进行了表征。利用四球摩擦磨损试验机考察了曲轴箱试验前后油样摩擦学性能,采用扫描电镜(SEM)、EDS分析了磨损表面形貌及元素组成。结果表明:添加剂MoDTC在中低温环境下具有良好的抗氧化性能,可有效提高油品氧化安定性;高温环境下,含添加剂油样的抗氧化性能随添加量增加呈现先降低后增大的变化趋势;铝板沉积物量随MoDTC添加量增大呈先增加后减少的趋势,元素分析结果表明,MoDTC分解产物是铝板沉积物的重要组成部分;试验条件下,氧化降低了MoDTC添加剂的减摩性能和极压性能,对抗磨性则有明显提高。 相似文献
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二烷基二硫代磷酸镧的制备及性能研究 总被引:7,自引:1,他引:6
研制了二烷基二硫代磷酸镧(LaDDP),并在四球机上评定了其摩擦磨损性能;采用扫描电镜和能谱分析了钢球表面的磨斑形貌和元素组成。结果表明,二烷基二硫代磷酸镧具有良好的抗磨减摩性能,磨斑表面含有硫、磷、镧等抗磨成分。 相似文献
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润滑油纳米铜添加剂与硫代磷酸复酯胺盐复配体系的摩擦磨损性能 总被引:4,自引:0,他引:4
利用四球试验机研究了润滑油纳米铜添加剂与硫代磷酸复酯胺盐复配体系的摩擦学性能。结果表明,两种添加剂在一定添加量范围内都可以改善基础油的抗磨性能。在试验范围内,润滑油纳米铜添加剂与硫代磷酸复酯胺盐复配体系具有一定的摩擦学协同效果,且两者的添加量各为0.3%和1.0%时,复配体系抗磨减摩协同效果最佳。采用表面分析技术对最佳复配润滑体系钢球磨斑表面的形貌和表面膜的元素组成进行了分析,推断其摩擦表面是由金属Cu形成的沉积膜和S、P等元素形成的化学反应膜共同组成的复合表面膜,使复配润滑体系呈现良好的抗磨减摩协同效果。 相似文献
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采用矿物油和合成油调配成半合成发动机油基础油,通过表面化学修饰和吸附修饰表面改性超细二硫化钨颗粒,使其作为固体润滑添加剂稳定悬浮于基础油中,并加入一定量的功能添加剂,研制了一种二硫化钨发动机油。经过摩擦学性能实验以及与国内外发动机油进行对比研究后,发现该发动机油的油膜强度分别是国外发动机油和国内发动机油的1.06和1.38倍,烧结载荷分别是它们的1.75和2.33倍,并且在392N、1450r/min、30min条件下长时间作用时,摩擦副的摩擦系数随时间的增长而减少,磨斑直径减小,磨斑表面光滑,没有明显的犁沟出现。表明二硫化钨发动机油具有优良的抗磨、减摩和极压性能。 相似文献
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Shuai-Liang Yang Li-Chao Huang Qing-Qing Luo Chen-Xi Zhang Guan-Jun Zhang 《Petroleum Chemistry》2017,57(8):722-727
A new kind of N-containing heterocyclic borate ester (MTMDB) as lubricant additive was synthesized and characterized. The tribological behaviors of MTMDB and ZDDP in 100N base oil were evaluated through four-ball machine. The surface morphology of the worn surface lubricated by MTMDB was investigated by scanning electron microscope (SEM) and the tribological mechanisms were analyzed by energy dispersive spectrometer (EDS). The results show that the synthesized additive exhibits high hydrolytic stability, good anti-wear property and excellent extreme pressure performance. When 2.5% MTMDB was added into the 100N base oil, the smallest wear scar diameter (WSD) 0.48 mm is obtained. Furthermore, S and B elements were detected on the surface of the abraded steel. This can be confirmed that MTMDB has adsorbed and reacted with the steel surface during the rubbing process and generates a protective film. 相似文献
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Tungsten film (W film) is deposited by using the ion beam assisted deposition (IBAD) on the 316L substrate surfacein this experiment. The micro structure and nano-hardness of the film are investigated by scanning electron microscopy(SEM) and nano-indentation tester. The tribological behavior of W film under lubrication by oil with ZDDP and MoDTCis evaluated by a SRV test machine. The tribo-film formed on the worn surfaces is investigated by X-ray photoelectronspectroscopy (XPS) to find out the tribological mechanisms between the W film and the two additional additives. The resultshows that the W film lubricated by ZDDP and MoDTC-blended base oil has synergistic effects on the friction reductionproperty, while the anti-wear property is mainly caused by the hard surface of W film. 相似文献
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利用高频往复试验机研究了被微量水污染的含清净剂油品的抗磨减摩性能变化及其作用机理。结果表明:试验选用的5种清净剂均能增强润滑油基础油的抗磨减摩性;碱值高的清净剂C对基础油的润滑性改善效果最好,摩擦因数仅为0.10;但是水对分别添加清净剂A,B,E的油品抗磨性能影响较小,对分别添加清净剂C和D的油品抗磨性能影响较大;当油品中清净剂C加入量(w)为2.0%、水加入量(w)分别为0.1%和0.3%时,往复试验钢球的平均磨斑直径分别增至410.0 μm和416.0 μm,油品抗磨性明显变差。含有相同有机酸基质类型的清净剂,过剩碱性组分的水溶性越强,相应油品测试时钢球的磨斑直径越大;含有相同金属类型,不同有机酸基质清净剂的油品试验时的摩擦因数和钢球磨斑形貌变化趋势不同。 相似文献
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《Egyptian Journal of Petroleum》2022,31(3):71-76
The goal of this study was to study the anti-wear properties of grease formulated from waste engine oil (WEO) when additives are added. There were two types of grease formulated namely sodium and fumed silica (FS) greases. The greases were formulated using a weight percentage ratio with and without the addition of additives before the attributes of consistency, FTIR (Fourier transform infrared spectroscopy), and anti-wear analysis were conducted. Results showed that the addition of additives did not affect the properties of the formulated grease except for that of sodium grease as demonstrated by the FTIR result. Sodium grease produced a spectrum with a peak in the region < 600 cm?1 when analyzed using FTIR. The corrosiveness of the grease toward the copper strip was also low, as determined by class 1 corrosiveness. The addition of additives resulted in no improvement in the anti-wear properties of the grease as the coefficient of friction (COF) was low for the grease without additives than for the grease with additives. However, the addition of additives can reduce the wear scar diameter of the greases. Based on the findings of this investigation, it was found that the addition of additives did not alter the properties of the greases or improve the anti-wear properties of the greases except for the wear scar diameter. 相似文献