Improving the tribological and corrosive properties of MoS2-based coatings by dual-doping and multilayer construction

• DOI: 10.1016/j.apsusc.2017.12.167
• Publication Date: 2017-12-20T04:47:31Z
• Authors: Kedong Shang; Shaoxian Zheng; Siming Ren; Jibin Pu; Dongqing He; Shuan Liu
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract The pure MoS2 coating always performs high friction coefficient and short service life when used in high humidity or after long-time storage in humid atmospheric environment. In this study, the MoS2/Pb-Ti composite and MoS2/Pb-Ti multilayer coatings are deposited to improve the corrosion resistance in 3.5 wt% NaCl solution and tribological performance in high humidity condition. The electrochemical impedance spectra and salt spray test shown that the MoS2/Pb-Ti composite and multilayer coatings can inhibit the permeation of oxygen and other corrosive elements, thus resulting a high corrosion resistance. Furthermore, compared with pure MoS2 coating, the tribological performance of the MoS2/Pb-Ti composite and multilayer coatings is also improved significantly owing to the high mechanical properties and compact structure. Moreover, the heterogenous interfaces in MoS2/Pb-Ti multilayer coating play an important role to improve the corrosion resistance and tribological performance of coatings. Overall, the dual-doping and multilayer construction are promising approaches to design the MoS2 coatings as the environmentally adaptive lubricants.