内燃机油中添加剂元素含量水平及来源分析

采用波长色散X射线荧光光谱法对来自美国、德国和日本等9个产地，SM，SN，CI和CH等级别的98个内燃机油中P，S和Cl等11个元素的含量进行了定量检测，并根据油品中Zn/P，S/Mo和Ca/Mg元素之间的比例关系，对内燃机油中的元素来源、添加剂组成及配比进行了研究。结果表明：内燃机油的中锌、磷、钙、硫、镁和钼含量分别在0.09%～0.17%，0.07%～0.15%，0.13%～0.43%，0.20%～0.47%，0.04%～0.15%和0.01%～0.05%之间;其中，Ca，S，P和Zn是内燃机油中的常见主要元素，Mg和Mo元素存在于高级别的内燃机油中，而铌、钨、钛和钠则存在于个别内燃机油中。

Concentration Levels and Sources Analysis of Additives Element in Engine Oil

The present article adopts wavelength-dispersive X-ray fluorescence spectrometry to measure elements of P, S and Cl in 98 engine oil samples from America, Germany and Japan and including SM, SN, CI and CH API grade. Proportional relationship of Zn/P, S/Mo and Ca/Mg illustrated the correlation between experimental data and additive contents. The experiment indicates that the concentration levels of Zn, P, Ca, S, Mg and Mo were 0.09%~0.17%，0.07%~0.15%，0.13%~0.43%，0.20%~0.47%，0.04%~0.15% and 0.01%~0.05% respectively, among which the Ca，S，P and Zn were the main elements of engine oil, Mg and Mo exist in high quality level engine oil, while Nb, W, Ti and Na were present in individual engine oil.