硫系和磷系添加剂对菜籽油摩擦学性能的影响

采用四球摩擦磨损试验机考察了硫系添加剂T321、磷系添加剂P120和T321-P120复配添加剂对菜籽油抗磨和极压性能的影响．结果表明：T321单剂、P120单剂和T321-P120复配添加剂均能够有效地提高菜籽油的抗磨和承载能力；T321-P120复配添加剂能够有效地改善菜籽油的减摩性能；T321和P120具有协同减摩、抗磨和极压作用，当二者的配比适当时，相应油样的综合摩擦学性能最佳．

Effect of S-and P-Type Additives on Tribological Behavior of Rapeseed Oil

The effect of S-type additive T321 and P-type additive P120 on the EP and AW abilities of rapeseed oil was investigated on a four-ball machine, and the synergistic effect between the two additives was also examined on the same friction and wear tester. Thus the p_B and p_D values of the rapeseed oils with or without the additive were determined according to the standard methods, while the corresponding wear scar diameters of the steel balls were measured on an eye-sight microscope. The wear scar of the steel ball was observed on a scanning electron microscope. It was found that both the T321 and P120 additives were able to greatly increase the load-carrying and extreme pressure and antiwear properties of the rapeseed oil. Specifically, the complex additive made of T321 and P120 with a proper composition was most effective to improve the comprehensive tribological behavior of the base stock, which was attributed to the synergistic effect between the two additives.