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合成了1种不含硫磷的新型稀土化合物,该化合物在液体石蜡中具有较好的溶解性.热重分析(TGA)表明该化合物热稳定性较好.采用四球摩擦磨损试验机考察了其作为添加剂在液体石蜡中的减摩抗磨性能,结果表明当添加剂的含量为3.0%(w/w)时,与商业化的ZDDP相比具有更好的减摩抗磨效果.当与一定量的有机配体进行复配后,其性能可得到进一步提升.采用X射线光电子能谱(XPS)对磨斑表面进行了分析,结果发现La以羧酸镧和单质镧的形成存在,表明添加剂与金属表面发生了摩擦化学反应.俄歇电子能谱(AES)对元素的深度分布情况表明La向金属基体发生了渗透.含有羧酸镧的吸附膜和含有单质镧、羧酸亚铁的反应膜共同构成了高性能的边界润滑膜.
A novel sulfur-free phosphorus-containing rare earth compound was synthesized, which has good solubility in liquid paraffin, and TGA shows that the compound has good thermal stability. The four-ball friction and wear tester was used to investigate its thermal stability. The results of friction and wear resistance of the additive in liquid paraffin show that the additive has a better anti-friction and anti-wear effect than the commercial ZDDP when the content of the additive is 3.0% (w / w) Of the organic ligand complex, its performance can be further enhanced.X-ray photoelectron spectroscopy (XPS) analysis of the surface of the spot, the results found that La lanthanum and elemental lanthanum formation exists, indicating that additives and Friction and chemical reaction took place on the metal surface.The depth distribution of the elements by Auger electron spectroscopy (AES) showed that La was infiltrated into the metal matrix.The adsorption film containing lanthanum carboxylate and the reaction film containing elemental lanthanum and ferrous carboxylate Together constitute a high-performance boundary lubrication film.