An electrodeposited Ni-P-WS2 coating with combined super-hydrophobicity and self-lubricating properties. (10th August 2017)

• Record Type: Journal Article
• Authors: He, Y.; Sun, W.T.; Wang, S.C.; Reed, P.A.S.; Walsh, F.C.
• Is Part Of: Electrochimica acta. Volume 245(2017)
• Page Start: 872
• Page End: 882
• Publication Date: 2017-08-10
• Subjects: dual-scale -- electrodepositon -- Ni-P -- self-lubrication -- super-hydrophobicity; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.05.166
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Self-lubrication and super-hydrophobicity are sought-after qualities in industrial surface finishing but such properties are rarely combined in a single coating. The present studies have produced a low-friction, superhydrophic Ni-P-WS2 coating by a versatile one-pot, single-step electrodeposition. By adjusting the particle and surfactant concentrations, a hierarchical surface, consisting of micron-sized protrusion arrays and submicron-sized bumps on the top and exhibiting a high water contact angle of 157 deg was achieved. Furthermore, mechanical and friction properties are characterized, revealing that sufficient WS2 embedded in the Ni-P coatings enables a reduced friction coefficient of 0.17 by the formation of a self-lubricating tribofilm.