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特定结构的润滑添加剂脂肪酸羟胺皂不仅具有较好的油性,还有较好的抗磨作用。用四球试验、扫描电子显微镜(SEM)、俄歇能谱(AES)等手段研究了不同脂肪酸的羟胺皂在水体系下的摩擦学性能,提出了“物理吸附-混合胶束-混合团聚”减摩抗磨机理。试验结果表明,脂肪酸羟胺皂形成润滑膜的强度随着直链碳数的增加而增强,随脂肪酸的烯键数目的增加而增强;源自疏水有机碳链的空间位阻对油膜强度的影响较小,而来自亲水基团的空间位阻则影响显著。AES分析结果表明,147N和294N负载下的四球磨痕上的氧化层的确是因摩擦而产生,不论是氧化铁层厚度比还是上面的有机物层的厚度比均为2:1。
Specific structure of the lubricant additives fatty acid hydroxylamine soap not only has better oily, as well as better anti-wear effect. The tribological properties of hydroxylamine soap with different fatty acids in water system were studied by four-ball test, scanning electron microscopy (SEM) and Auger energy dispersive spectroscopy (AES) "Anti-friction and anti-wear mechanism. The experimental results show that the strength of the lubricating film formed by the hydroxylamine soap of fatty acid increases with the increase of linear carbon number and increases with the increase of the number of ethylenic bonds of fatty acid. The steric hindrance derived from the hydrophobic organic carbon chain has an effect on the film strength Small, whereas steric hindrance from hydrophilic groups has a significant effect. AES analysis shows that the oxide layer on the four-ball wear marks under 147N and 294N is indeed caused by friction, and the ratio of the thickness of the iron oxide layer to the thickness of the organic layer above is 2: 1.