硫化异丁烯润滑机理的研究

Study of the Lubrication Mechanism of Olefin Sulfide

利用程序微量四球法 ,采用硫化异丁烯作为添加剂 ,在不同条件下进行摩擦磨损试验 ;采用凝胶色谱和等离子发射光谱对摩擦产物进行定性分析 ,并采用X射线光电子能谱对钢球磨斑表面进行分析 .结果表明 :在较低载荷下无摩擦聚合物生成 ,抗磨作用归因于硫化异丁烯在摩擦副接触表面上形成的化学吸附膜和少量的摩擦化学无机反应膜 ;在中等载荷条件下 ,摩擦过程中生成的具有大分子量的摩擦聚合物起主要抗磨作用 ;在苛刻试验条件下 ,虽然有摩擦聚合物生成 ,但其无抗磨减摩作用 。

Micro sample four-ball friction and wear tests were conducted to evaluate the action mechanism of olefin sulfide (SO) as an additive in liquid paraffin. The residue lubricating oil was analyzed qualitatively by means of gel permeation chromatography (GPC) and inductively coupled plasma (ICP) atomic emission spectrometry. An X-ray photoelectron spectrometer (XPS) was used to investigate the tribochemical reaction of SO with the steel pair. As the results, no friction polymer is detected by GPC in the residue lubricating oil at a relatively low load of 98N, and the friction-reducing and antiwear capacity in this case is mainly attributed to the chemisorbing of SO onto the metal surface. Under medium load of 196N to 294N, the formation of friction polymer of high molecular weight is confirmed by GPC spectra of the residue lubricating oil, and the friction-reducing and antiwear capacity in this case is attributed to the friction-induced polymer. Under a relatively high load of 392N, the friction polymer experiences degradation and less Fe is detected in the residue lubricating oil, while the inorganic boundary film composed of FeS and FeSO 4 contributes to improve the friction-reducing and antiwear behavior in this case.