Nano-phases and corrosion resistance of C+Mo dual implanted steel

The corrosion resistance of C + Mo dual-implanted H13 steel was studied usi ng multisweep cyclic voltammetry. The phase formation conditions for corros ion resistance and its effects were researched. The super-saturation solid station solution of Mo+ and C+ atoms was formed in Mo + C dual implanted st eel. Precipitate phase with nanometer size Fe2Mo, FeMo, MoC, Fe5C3 and Fe7C 3 were formed in dual implanted layer. The passivation layer consisted of t hese nanometer phases. The corrosion resistance of the dual implanted layer was better than that of single Mo implantation. J(P) of the Mo implanted s ample is 0.55 times that of H13 steel. The corrosion resistance of the dual implantation was enhanced when ion dose increased. When the Mo ion dose wa s 6 x 10(17)/cm(2) in the dual implantation, J(P) of the dual implanted sam ple was only 0.11 times that in H13 steel. What is important is that pittin g corrosion properties of dual implanted steel were improved obviously.