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

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, su­per­hy­drophobic 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.

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ORCID for P.A.S. Reed: orcid.org/0000-0002-2258-0347

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