A lubricant composition comprising an oil of lubricating viscosity and 0.01 to 5 percent by weight of a substantially sulfur-free alkyl phosphate amine salt, where at least 30 mole percent of the phosphorus atoms are in an alkyl pyrophosphate salt structure, exhibits good antiwear performance, even in the presence of corrosion inhibitor additives. In the phosphate amine salt, at least 80 mole percent of the alkyl groups are typically secondary alkyl groups of 3 to 12 carbon atoms.
一种润滑剂组合物由具有润滑粘度的油和 0.01%至 5%(按重量计)基本上不含
硫的烷基
磷酸胺盐(其中至少 30 摩尔%的
磷原子处于
焦磷酸烷基盐结构中)组成,即使在有缓蚀添加剂的情况下,也能表现出良好的抗磨损性能。在
磷酸胺盐中,至少 80 摩尔%的烷基通常为 3 至 12 个碳原子的仲烷基。