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1. Fe-Ni-Al alloys with different compositions were studied for their corrosion behavior as inert anodes in the production of pure aluminum.

2. The corrosion layer on the anode contains fluorine salt that corrodes the oxide film, and the inner layer is Ni-enriched while the outer layer is enriched with Fe and O due to the preferential oxidation of Fe.

3. The electrolytically deposited oxide films on Fe-Ni-Al alloys contain protective oxides, making them highly corrosion-resistant. The alloy with 3.9 wt.% Al has a relatively negative passivation potential and can form a protective film as anode.

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