Corrosion resistance of Ti-6Al-4V alloy with nitride coatings in Ringer's solution

► Nitride coatings were formed on Ti-6Al-4V alloy by thermodiffusion saturation. ► Nitrides improve corrosion resistance of alloy in Ringer's solution at 36 and 40 °С. ► Corrosion resistance increases with increase of TiN phase in nitride coating. ► Corrosion resistance is determined significantly by quality of nitride coating.