Effect of NiO addition on the high-temperature oxidation and corrosion behaviors of Fe–Ni alloy as inert anode material for aluminum electrolysis

Yang, Wenjie; Wang, Yan; Zhai, Hongfei; Fan, Jiangkun

doi:10.1007/s10853-019-04250-9

Cited by 6 publications

(2 citation statements)

References 18 publications

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“…The Fe content of NiO phase in zone P is less than that of other zones. The decrease of Fe element contents of both NiFe 2 O 4 and NiO phases in the corrosion zone indicates that Fe is preferentially corroded, which is like NiFe 2 O 4 -10NiO ceramic and 15(Cu-20Ni)/NiFe 2 O 4 -10NiO cermet anode [ 4 ]. The decrease of Fe element content of the uncorroded NiFe 2 O 4 proves to be a reaction between Fe element and NiO [ 20 ].…”

Section: Resultsmentioning

confidence: 99%

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Electrolytic Corrosion Behavior of 20 Cu-20 Ni-54 NiFe2O4-6 NiO Cermet with Interpenetrating Structure at 880 °C and 960 °C

Yuqiang

Xiong

et al. 2022

Materials

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Here, 20 Cu-20 Ni-54 NiFe2O4-6 NiO (wt%) cermets were prepared via the powder metallurgy process, and the electrolytic corrosion behavior of the cermets at 880 °C and 960 °C was studied through the microstructure analysis by SEM and EDS. Results show that the ceramic phase is seriously affected by chemical corrosion at 880 °C electrolysis, and it is difficult to form a dense ceramic surface layer. A dense ceramic surface layer is formed on the bottom of the anode electrolyzed at 960 °C, and the dense layer thickens with the extension of the electrolysis time. The formation of the dense surface layer is mainly caused by the oxidation of Ni. The oxidation rate of the metallic phase and the corrosion rate of the ceramic phase have an important effect on the formation of the dense layer. In the corrosion process of NiFe2O4 phase, preferential corrosion of Fe element occurs first, and then NiO phase is precipitated from NiFe2O4 phase. After the NiO is dissolved and corroded, the NiFe2O4 grains collapse and the ceramic phase peels off from the anode.

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Section: Resultsmentioning

confidence: 99%

“…The main candidate materials for inert anode are NiFe 2 O 4 -based cermet, Cu alloy, and Ni alloy [ 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. On 10 May 2018, Alcoa and Rio Tinto announced world’s first carbon-free aluminum smelting process, and planned for sale beginning in 2024 [ 10 ].…”

Section: Introductionmentioning

confidence: 99%