二聚酸盐的合成及在水性基础液中的摩擦学及防腐防锈性能

Synthesis of Dimer Acid Salt and Its Tribological,Rust-inhibiting and Anti-corrosion Performances in Water-based Fluid

采用二聚脂肪酸和二乙醇胺合成一种二聚酸二乙醇胺盐,在四球摩擦磨损试验机上考察其在水性基础液中的摩擦学性能,用X射线光电子能谱仪(XPS)分析试验后钢球磨斑表面典型元素的化学状态。结果表明:该添加剂在水性基础液中具有优良的承载能力和抗磨减摩性能以及良好的液相防锈和抑制铜片腐蚀的性能;在摩擦过程中,磨斑表面形成了含氮的吸附膜和含Fe2O3的化学反应膜,二者协同作用使添加剂在摩擦过程中具有良好的抗磨减摩性能。

A dimer acid diethanolamine salt was synthetised by dimer fatty acid and diethanolamine. The tribological properties of the salt in water-based fluid were evaluated with a four-ball machine. The typical elements on the worn surfaces of steel ball were analyzed by X-ray photoelectron spectroscopy （XPS）. The results indicate that the synthetised additive possesses good load-carrying properties, antiwear and friction reducing abilities as well as good rust-inhibiting and anti-corrosion performances in water-based fluid. An adsorption film containing nitrogen and a chemical reaction film containing chemical species of Fe2O3 are formed on the steel ball surfaces lubricated with dimer acid additive during the friction process. The cooperation action of these films contributes to the imnrovement of tribological properties of the lubricant.