Effect of Cerium on Anodic Behavior of Aluminum Conductor Alloy AlV0.1 in NaCl Solution Environment

The electrochemical behavior of cerium-modified aluminum conductive alloy AlV0.1 in an aqueous NaCl solution was studied by the potentiostatic method at a potential scan rate of 2 mV/sec. The time dependence of the change in the free corrosion potential of the original AlV0.1 alloy and alloys with the addition of cerium show that they shift to the region of positive values. It was found that an increase in the cerium concentration shifts the free corrosion potential, repassivation potential and pitting potential in the positive direction of the ordinate axis. With an increase in the chloride ion concentration in the NaCl solution, a shift in the electrochemical potentials of cerium-doped aluminum conductive alloy AlV0.1 to the negative region was observed. An increase in the chloride ion concentration promotes an increase in the corrosion rate, regardless of the alloy composition. It is shown that the cerium additive reduces the corrosion rate of the aluminum conductive alloy AlV0.1 by 13% in a NaCl solution.

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