Disclosed is a lubricating oil composition for low-friction sliding materials, which is used in a sliding mechanism where a DLC film containing hydrogen in an amount of from 5 atom% to 50 atom% is formed on at least one sliding surface. The lubricating oil composition contains, in the lubricant base oil therein and based on the total amount of the composition, (A) an organic zinc dithiophosphate in an amount of from 0.005% by mass to 0.12% by mass in terms of the phosphorus concentration therein, (B) an amine-based friction-reducing agent in an amount of from 0.05% by mass to 5.0% by mass, and (C) an alkaline earth metal salicylate-based detergent and/or an alkaline earth metal sulfonate-based detergent in an amount of from 0.05% by mass to 0.5% by mass in terms of the alkaline earth metal concentration therein, wherein the component (A) contains, based on the total amount of the composition, a zinc primary dialkyldithiophosphate in an amount of from 0.005% by mass to 0.05% by mass in terms of the phosphorus concentration therein.
本发明公开了一种用于低摩擦滑动材料的润滑油组合物,该组合物用于在至少一个滑动表面上形成含
氢量为 5 原子%至 50 原子%的 DLC 膜的滑动机构中。该润滑油组合物在其中的润滑油
基础油中,根据组合物的总量,含有 (A) 有机
二硫代磷酸锌,以其中的
磷浓度计,含量为 0.005% (质量百分比)至 0.12% (质量百分比);(B) 基于胺的减摩剂,含量为 0.05% (质量百分比)至 5.(C) 碱土
金属
水杨酸酯类洗涤剂和/或碱土
金属
磺酸盐类洗涤剂,以其中碱土
金属的浓度计,其用量为 0.05% (质量) 至 0.5% (质量),其中组分 (A) 含有以组合物总量计,以其中
磷的浓度计,其用量为 0.005% (质量) 至 0.05% (质量)的伯基
二烷基二硫代磷酸锌。