Corrosion behaviour of spark plasma sintered Ti-6Al-4V with Nano-TiN addition in different media

Abstract

The Potentiodynamic polarization and chronoamperometry tests were employed to investigate the corrosion performance of sintered Ti-6Al-4V reinforced with nanosize titanium nitride in NaCl, HCl and H2SO4 solutions. Scanning electron microscopy (SEM) was used to study the surface morphology of the corroded samples after the chronoamperometry tests. The corrosion behaviour of the titanium matrix composite shows that TiN can provide an effective protection for Ti-6Al-4V alloy in sodium chloride, hydrochloric and sulphuric acids. Ti-6Al-4V reinforced with 4 vol% TiN displayed superior corrosion performance as compared to the sintered Ti-6Al-4V.