Improvement of Magnetic Field on Tribological Properties of Lubricating Oils with Zinc Butyloctyldithiophosphate  

作　　者：Jiang Zeqi Fang Jianhua Chen Boshui Wu Jiang Wang Jiu Zheng Zhe 

机构地区：[1]Department of Military Oil Application & Management Engineering, Logistical Engineering University

出　　处：《China Petroleum Processing & Petrochemical Technology》2016年第4期92-98,共7页中国炼油与石油化工（英文版）

基　　金：financial support provided by the National Natural Science Foundation of China(Project No.51375491);the Natural Science Foundation of Chongqing(Project No.CSTC,2014JCYJAA50021);the Innovation Fund of Logistical Engineering University(Project No.YZ13-43703)

摘　　要：Tribological properties of 150 SN mineral oil and the oils doped with different contents of zinc butyloctyldithiophosphate(T202) under magnetic field or non-magnetic field were evaluated on a four-ball tribotester by applying an external magnetic field around the friction region. Moreover, the morphology and the tribochemical characteristics of worn surfaces were examined by a scanning electron microscope(SEM) and an X-ray photoelectron spectrometer(XPS). Then the lubrication mechanisms were discussed. The tribological test results indicated that the wear scar diameters(WSDs) of steel balls lubricated by the T202-containing lubricating oils and the friction coefficients of the corresponding oil under magnetic field were smaller than those without magnetic affection. The worn surface lubricated with the T202-formulated oils in a magnetic field was smoother than that obtained under the normal condition. Furthermore, the results of XPS analysis indicated that tribochemical films on the surfaces lubricated with T202-doped oils were mainly composed of compounds such as FeSO_4, FeS and ZnS. The atomic concentrations of oxygen, sulfur, iron, zinc and phosphorus species identified in T202 under magnetic field were higher than those without magnetic impact. It can be inferred that the improved anti-wear and friction-reducing ability of T202-doped oils was attributed to the promoted tribochemical reactions and the modification of the worn surfaces induced by magnetic field.Tribological properties of 150 SN mineral oil and the oils doped with different contents of zinc butyloctyldithiophosphate（T202） under magnetic field or non-magnetic field were evaluated on a four-ball tribotester by applying an external magnetic field around the friction region. Moreover, the morphology and the tribochemical characteristics of worn surfaces were examined by a scanning electron microscope（SEM） and an X-ray photoelectron spectrometer（XPS）. Then the lubrication mechanisms were discussed. The tribological test results indicated that the wear scar diameters（WSDs） of steel balls lubricated by the T202-containing lubricating oils and the friction coefficients of the corresponding oil under magnetic field were smaller than those without magnetic affection. The worn surface lubricated with the T202-formulated oils in a magnetic field was smoother than that obtained under the normal condition. Furthermore, the results of XPS analysis indicated that tribochemical films on the surfaces lubricated with T202-doped oils were mainly composed of compounds such as FeSO_4, FeS and ZnS. The atomic concentrations of oxygen, sulfur, iron, zinc and phosphorus species identified in T202 under magnetic field were higher than those without magnetic impact. It can be inferred that the improved anti-wear and friction-reducing ability of T202-doped oils was attributed to the promoted tribochemical reactions and the modification of the worn surfaces induced by magnetic field.

关 键 词：magnetic field zinc butyloctyldithiophosphate improvement lubrication 

分 类 号：TE626.3[石油与天然气工程—油气加工工程] O313.5[理学—一般力学与力学基础]