采用改进后的四球摩擦磨损试验机,研究了电磁场对含丁辛基二硫代磷酸锌盐(T202)和含双辛基二硫代磷酸锌盐(T203)的150SN基础油润滑性能的影响,结合扫描电子显微镜和X射线光电子能谱仪的分析结果,初步探讨了电磁场的作用机理.结果表明:在有、无电磁场的作用下,T202和T203添加剂都能增强基础油的润滑性能,其最佳的质量分数分别为1.0%~1.5%和1.5%~2.0%;在电磁场作用下,两种含二烷基二硫代磷酸锌(ZDDP)基础油中钢球的磨斑直径均比无电磁场时的小,且磨斑表面的犁沟较浅,擦伤程度较轻微;电磁场通过促进钢球表面摩擦化学反应膜的生成和摩擦副表面的改性(Zn-Fe合金的生成),提高了两种含ZDDP基础油的润滑性能.
The influence of eletromagnetic field on lubricating properties of 150SN base oils with T202 or T203 with were studied on a modified four-ball friction and wear tester, the mechanism of eletromagnetic field were discussed based on the analysis results of scanning electron microscope and X-ray photoelectron spectroscopy.The results indicate that T202 and T203 could both improve lubricating properties of the base oils with or without eletromagnetic field, which got the best lubricating properties when the mass fractions of additive T202 and T203 were 1.0%-1.5% and 1.5%-2.0%, respectively.The wear scar diameters of steel balls in two base oils containing ZDDPs with eletromagnetic field were smaller than that of steel balls without eletromagnetic field, which also presented the shallower furrow and slighter scratch on the surface of the wear scars.The lubricating properties of base oils containing ZDDPs under electromagnetic field were improved, which attributed to that the electromagnetic field promoted the formation of friction chemical reaction film and the modification on surface of friction pairs (Zn-Fe alloy formation).
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