Corrosion Behavior of Cu-20Co-20Cr-20Ni Alloy in 0.5 mol·L-1 NaCl Neutral Solutions
Nanomaterials have gained significant attention due to their unique properties,leading to extensive research in this field.Nano-sized and conventionally sized powders were prepared through mechanical alloying(MA)and powder metallurgy(PM)techniques in experiments.By controlling factors such as temperature and pressure,both sizes of Cu-20Co-20Cr-20Ni powders were consolidated into bulk alloys using a vacuum hot-press sintering furnace.The corrosion behavior of these alloys and the impact of nanocrystallization were studied using electrochemical tests in 0.5 mol·L-1 neutral NaCl solution.The results indicated that when Cu-20Co-20Cr-20Ni alloy was exposed to a 0.5 mol·L-1 NaCl corrosive solution,the nanosized Cu-20Co-20Cr-20Ni alloy exhibited a positive shift in its self-corrosion potential compared to the corresponding conventional-sized alloy.Furthermore,the charge transfer resistance increased,and the corrosion current density decreased for the nanosized alloy.Therefore,it can be concluded that grain refinement can enhance the corrosion resistance properties of Cu-20Co-20Cr-20Ni alloy.
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