A heterocyclic derivative of (2 sulphurone benzothiazole) 3 methyl dodecanoate was synthesized. Its tribological performance when added to liquid paraffin was evaluated on a four ball tester and a ring on block machin...A heterocyclic derivative of (2 sulphurone benzothiazole) 3 methyl dodecanoate was synthesized. Its tribological performance when added to liquid paraffin was evaluated on a four ball tester and a ring on block machine. Results indicate that compared with the base oil the wear resistance and load carrying capacities of the oil with novel additive are improved, and the friction coefficient is decreased. There is an optimal content of the novel compound, at which the corresponding oil gives the highest maximum non seizure load. Above the content, the load carrying capacity of the oil is not increased but decreased. The nature of the film formed on the rubbed surface was investigated by X ray photoelectron spectroscopy (XPS) analysis, and the action mechanism of the novel compound was discussed. [展开更多
An oil soluble rare earth compound, samarium isooctoxyborate, was synthesized and used as an antiwear and extreme pressure additive for lubricating oils. Its tribological performances were evaluated with a four ball m...An oil soluble rare earth compound, samarium isooctoxyborate, was synthesized and used as an antiwear and extreme pressure additive for lubricating oils. Its tribological performances were evaluated with a four ball machine and a ring on block rig. In addition, surface analyses with Auger electron spectroscopy and X ray photoelectron spectroscopy were also conducted to study the surface film formed by the additive under boundary lubrication conditions. The test results show that the additive exhibits good friction reducing ability, good antiwear property and excellent extreme pressure performance. Surface analyses further disclose the coexistence of organic film, oxidation film and permeating film on the rubbing surface, which contributed to improve the tribological properties of the base oil.展开更多
文摘A heterocyclic derivative of (2 sulphurone benzothiazole) 3 methyl dodecanoate was synthesized. Its tribological performance when added to liquid paraffin was evaluated on a four ball tester and a ring on block machine. Results indicate that compared with the base oil the wear resistance and load carrying capacities of the oil with novel additive are improved, and the friction coefficient is decreased. There is an optimal content of the novel compound, at which the corresponding oil gives the highest maximum non seizure load. Above the content, the load carrying capacity of the oil is not increased but decreased. The nature of the film formed on the rubbed surface was investigated by X ray photoelectron spectroscopy (XPS) analysis, and the action mechanism of the novel compound was discussed. [
文摘An oil soluble rare earth compound, samarium isooctoxyborate, was synthesized and used as an antiwear and extreme pressure additive for lubricating oils. Its tribological performances were evaluated with a four ball machine and a ring on block rig. In addition, surface analyses with Auger electron spectroscopy and X ray photoelectron spectroscopy were also conducted to study the surface film formed by the additive under boundary lubrication conditions. The test results show that the additive exhibits good friction reducing ability, good antiwear property and excellent extreme pressure performance. Surface analyses further disclose the coexistence of organic film, oxidation film and permeating film on the rubbing surface, which contributed to improve the tribological properties of the base oil.
