Tribocorrosion Performance of WC-12Co HVOF-Sprayed Coatings Reinforced with Carbon Nanotubes

WC-12Co HVOF-sprayed coatings (~400 µm in thickness) reinforced with multiwalled carbon nanotubes (MWCNTs), were deposited on a steel substrate. The aim of this work is to provide and analyze data from HVOF sprayed coatings, concerning the influence addition MWCNTs their tribocorrosion performance, 3.5% NaCl electrolyte. Electrochemical (current density corrosion potential potentiodynamic polarization curves) wear (coefficients friction, coating volume losses constants) are reported for without (labeled WCCNT WCAS-RECEIVED, respectively), considering synergistic effects coupling. Scanning electron microscopy (SEM) profilometry used explain both mechanisms that account each coating’s performance environment. During tests, similar constants, order approximately 10−12 m3/Nm, found all samples, an increase ~20% due presence. However, MWCNTs, remarkable icorr, representing almost 3 times icorr WCAS-RECEIVED coating, was determined. above results illustrate complex occur when these tested under conditions, which give rise concurrent interacting phenomena, involving electrochemical mechanical responses.