Study on the Protection Technology Against Aluminized Surface of Anode Stub for Aluminum Electrolysis

In order to improve the protective performance of the surfaceSurface of anode stubAnode stub for aluminum electrolysisAluminum electrolysis, an Fe-Al alloyAl alloys layer was prepared on the surfaceSurface of Q235BQ235B by pack aluminizingAluminizing. The microstructureMicrostructure, high-temperature oxidation resistance, microhardnessMicrohardness, wear resistance, and mechanical propertiesMechanical properties of aluminized layer were analyzed by scanning electron microscope, oxidation test, and abrasive wear test. The results showed that when Q235BQ235B was aluminized at 850 ℃ × 4 h, the maximum depth of aluminized layer reached 500 μm, the maximum hardnessHardness of aluminized layer reached 750 HV, and the wear resistance was 17 times than that of Q235BQ235B material. Under high temperature, a dense and uniform aluminaAlumina film layer on the surfaceSurface was generated in-situIn-Situ, which improved the oxidation resistance of Q235BQ235B material by more than 95 times, while the tensile strength and yieldYield strength remained unchanged after aluminizingAluminizing.