Intergranular corrosion and pitting corrosion resistances of Ni-Cr-Mo-Cu-Mx alloys

Ni-Cr-Mo-Cu-Mx nickel-base corrosion-resistant alloys were prepared by adding Ti and Fe with a manual electro-arc furnace.Intergranular corrosion and pitting corrosion resistances of these alloys were investigated by chemical erosion and electrochemical corrosion techniques(polarization curve methods and cyclic voltammetry).The results showed that the intergranular corrosion resistance of the alloys added Ti increased and the pitting corrosion resistance decreased.Fe addition deteriorated the intergranular corrosion resistance of Ni-Cr-Mo-Cu alloys but improved the pitting corrosion resistance.The electrochemical behaviors and characteristics of intergranular corrosion and pitting corrosion coincided with the results of chemical erosion.