Characterizations of nanocrystalline Co and Co/MWCNT coatings produced by different electrodeposition techniques

► Nanocrystalline Co and Co/MWCNTs are produced by DC and PRC electrodepositions. ► PRC is better than DC electrodeposition to improve the structure and properties of the coatings. ► The incorporation of MWCNTs improves the hardness and wear resistance of the coatings. ► The functionalization treatment improves the codeposition of MWCNTs with Co ions. ► The coatings with functionalized MWCNTs have better structures and properties.