Heat Treated NiP–SiC Composite Coatings: Elaboration and Tribocorrosion Behaviour in NaCl Solution

摘要

Tribocorrosion behaviour of heat-treated NiPudand NiP–SiC composite coatings was investigated in aud0.6 M NaCl solution. The tribocorrosion tests were performedudin a linear sliding tribometer with an electrochemicaludcell interface. It was analyzed the influence ofudSiC particles dispersion in the NiP matrix on current density developed, on coefficient of friction and on wearudvolume loss. The results showed that NiP–SiC compositeudcoatings had a lower wear volume loss compared to NiPudcoatings. However, the incorporation of SiC particles intoudthe metallic matrix affects the current density developed byudthe system during the tribocorrosion test. It was verifiedudthat not only the volume of co-deposited particles (SiCudvol.%) but also the number of SiC particles per coatingudarea unit (and consequently the SiC particles size) haveudmade influence on the tribocorrosion behaviour of NiP–SiCudcomposite coatings.