The effect of SiC nanoparticles addition on the electrochemical response of mechanically alloyed CoCrFeMnNi high entropy alloy

Polarization tests indicate both passivation properties and pitting susceptibility of A1H alloy. This has been confirmed by the corrosion potential (OCP) and the electrochemical impedance spectroscopy measurements (EIS) which revealed strong passivation process in the first 16 h of immersion in 0.1 M NaCl water solution. The addition of 5 wt% of SiC nanoparticles improves the mechanical properties (e.g. hardness, yield stress) simultaneously changing the surface electrochemical response by the time reducing (from 16 h to 4 h) of the corrosion resistance during immersion in chlorides.