ZHAO Hongbin1,2*, PENG Wenlong2, LIU Rende3, ZHANG Zhigang2, DENG Biyun2, WANG Lishen1, TAN Yuanqiang2
(1. College of Chemistry and Environmental Engineering, Dongguan University of Technology, Dongguan, Guangdong 523808, China 2. College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, China 3. Shanghai Baosteel Industry Inspection Company, Shanghai 201900, China)
Abstract: Three novel butoxy dithiocarbonate acetic esters were synthesized and their molecular structures were determined by H1-NMR,13C-NMR, IR, UV-Vis and elemental analysis. The thermal stability of the target products were also invested by thermogravimetric apparatus (TGA). The tribological behaviors of the novel compounds as lubricating additives in liquid paraffin were evaluated on a four-ball friction and wear tester, The worn steel surfaces were analyzed by means of optical microscope, scanning electron microscope (SEM) and X-ray photoelectron spectrometer (XPS). The results showed that the three novel additives in the liquid paraffin exhibited excellent anti-wear, load-carrying capacities in base stock, which was better than that of ZDDP. The analytical results of the worn steel surface indicated the occurrance of tribochemical reaction and the excellent performance of novel additives due to the formation of a boundary film. The film was composed of ferror oxide, ferrous oxide and organic compound containing sulfur.
Key words: lubricating additive; tribolgogical performance; tribochemical reaction
E-mail: zhaohbhanlf@163.com
Tribology, Vol. 31, Issue 5, 2011, 515~520
