硫化烯烃在镍基电刷镀层表面的作用机理

利用球－盘式摩擦磨损试验机，研究了润滑油极压抗磨添加剂硫化烯烃在Ｎｉ－Ｐ电刷镀层和Ｎｉ－Ｃｕ－Ｐ电刷镀层表面的作用效果，并且利用Ｘ射线光电子能谱仪和俄歇电子能谱仪分析了各摩擦表面边界润滑膜的成分和结构，进而分析讨论了添加剂硫化烯烃在这２种镀层摩擦表面的作用机理．结果表明，在基础油液体石蜡中添加适量的硫化烯烃润滑时，Ｎｉ－Ｐ镀层的承载能力显著提高，Ｎｉ－Ｐ镀层和Ｎｉ－Ｃｕ－Ｐ镀层的磨损率都明显降低．硫化烯烃在镀层摩擦表面反应生成的ＮｉＳ膜具有良好的极压、抗磨和一定的减摩作用

Lubricating Mechanism of Sulfurized Olefin on Ni Base Brush Plating Layers

The addition of various extreme pressure and antiwear additives in lubricating oil is an important and effective way to reduce friction and wear.Sulfurized olefin (SO) is used widely as an extreme pressure additive.The effectiveness of SO is attributed to the chemical reaction with iron to form an iron sulfide film.Brush plating is a special kind of electroplating.The Ni P and Ni Cu P brush plating layers show very good properties of anti scuffing,anti wear and reducing friction.But the lubricating behavior and mechanism of SO on Ni P and Ni Cu P plating layers are less studied so far.The tribological behavior of SO on Ni P and Ni Cu P brush plating layers was studied systematically on a ball on disc testing machine,and that of SO on 45 # steel was also studied for the sake of contrast.The composition of boundary lubrication films on disc worn surface was analysed using X ray photoelectron spectroscopy and Auger electron spectroscopy methods.Then the lubricating mechanism of SO on Ni P and Ni Cu P brush plating layers was discussed.It was found that the load carrying capacity of Ni P brush plating layer was increased obviously and the wear rates of Ni P and Ni Cu P brush plating layers were decreased very much with the addition of sulfurized olefin in lubricating oil.The chemical reaction film of NiS formed by the reaction of SO with the two brush plating layers on their wear surface possessed very good properties of anti scuffing and antiwear and a definite effect on reducing friction.