The corrosion behavior of intermetallic compounds Ni3(Si,Ti) and Ni3(Si,Ti)Â +Â 2Mo in acidic solutions

► The intergranular attack was observed for Ni3(Si,Ti) in acidic solutions. ► Ni3(Si,Ti) + 2Mo had the preferential dissolution of L12 compared to L12 + Niss phase in acidic solutions. ► Ni3(Si,Ti) + 2Mo had the lowest corrosion resistance in acidic solutions. ► The intermetallic compounds were difficult to form a stable film in the H2SO4 solution as well as in the HCl solution.