Abstract
The effect of anodic polarization on a pre-formed oxide scale of Ni-11Fe-10Cu alloy was investigated in Na2CO3-K2CO3 melt at 750 °C. The pre-formed oxide scale rearranged under anodic polarization and enabled the alloy as an inert anode for oxygen evolution. The anodic polarization has a positive effect on repairing defects in the original oxide scale, i.e., repair-enhancement effect, which can enhance the protectivity of an alloy substrate and eliminate further corrosion and oxidation. This study demonstrates an effective way to prepare a protective oxide scale, and reveals the rearrangement of pre-formed oxide scale under anodic polarization.
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