An electrodeposited Ni-P-WS2 coating with combined super-hydrophobicity and self-lubricating properties

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. B...

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Bibliographic Details
Published inElectrochimica acta Vol. 245; pp. 872 - 882
Main Authors He, Y., Sun, W.T., Wang, S.C., Reed, P.A.S., Walsh, F.C.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 10.08.2017
Elsevier BV
Subjects
Coated electrodes
Contact angle
dual-scale
electrodepositon
Friction
Hydrophobic surfaces
Hydrophobicity
Lubricants & lubrication
Lubricating properties
Lubrication
Ni-P
Properties (attributes)
Self lubrication
super-hydrophobicity
Surface finishing
super-hydrophobicity
electrodepositon
Ni-P
self-lubrication
dual-scale
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Summary: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.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2017.05.166