硼化硫代磷酸酯胺盐的极压抗磨性能研究

Extreme Pressure and Antiwear Behavior of Boronized Amine Salt of Thiophosphate as a Gear Oil Additive

以硫化物、磷化物、氮化物以及硼化物为原料合成了多功能润滑油添加剂———硼化硫代磷酸酯胺盐,对比考察了所合成的添加剂同几种常见商品添加剂的极压抗磨特性,探讨了在添加剂分子中引入B元素对其热氧化稳定性及腐蚀性能的影响,初步考察了硼化硫代磷酸酯胺盐在无灰液压油和齿轮油中的应用性能.结果表明:引入B元素可以显著改善S P N类多功能润滑油添加剂的热氧化稳定性和腐蚀性能;含有S、P、N和B等多种活性元素的合成添加剂在无灰液压油及齿轮油中具有广阔应用前景.

A series of S-P type additives were synthesized in an attempt to find alternates as commercial multifunctional additive zinc dialkyldithiophosphates. The emphasis was placed on the synthesis of a multifunctional additive containing tribologically active elements S, P, N, and B, which was based on the boronization of the synthetic amine salt of thiophosphate. The extreme pressure and antiwear abilities of the synthetic additives were comparatively investigated using various commercial P-S type additives as the references, while the thermal stability and corrosion behavior of the synthetic compounds examined by means of thermogravimetric analysis and Cu strip corrosion test. It was found that the boronized amine salt of the thiophosphate as an additive in SAE90 oil showed much better extreme pressure and antiwear ability than the other two synthetic additives. It had better thermal stability and corrosion-resistance as well, which made it a promising candidate as a novel multifunctional ashless additive in gear oils and hydraulic oils.