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Improving corrosion resistance of Cu-Al-based anodes in KF-AlF3-Al2O3 melts / S. K. Padamata, A. Yasinskiy, A. Shabanov [et al.] // Trans. Nonferrous Met. Soc. China. - 2022. - Vol. 32, Is. 1. - P. 354-363, DOI 10.1016/S1003-6326(22)65800-X. - Cited References: 24. - The work is performed as a part of the State Assignment for the Science of Siberian Federal University, Russia (No. FSRZ-2020-0013) . Use of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS" is acknowledged . - ISSN 1003-6326. - ISSN 2210-3384

РУБ Metallurgy & Metallurgical Engineering
Рубрики:
NI-FE
   ALUMINUM ELECTROLYSIS
   INERT ANODES
   NICKEL FERRITE
   BEHAVIOR
Кл.слова (ненормированные):
inert anodes -- potassium cryolite -- Cu-Al alloys -- corrosion -- aluminium electrolysis -- oxygen-evolving electrodes
Аннотация: The anodic behaviour of pre-oxidised and non-oxidised Cu−Al-based anodes (Cu−10Al and Cu−9.8Al−2Mn) in KF−AlF3−Al2O3 melts was studied through galvanostatic and potentiodynamic polarization techniques. The alloy compositions were oxidised for a short-term (8 h) at 700 °C, followed by galvanostatic polarization for 1 h at 800 °C with an applied current density of 0.4 A/cm2. The potentiodynamic curves were recorded with a sweep rate of 0.01 V/s. XRD analysis was conducted on frozen melt samples collected on the surface of the anode, and SEM observation was performed on the anode after the experiment to study the phases of the scales formed on the alloys. All the anode materials had a steady potential between 2.30 and 2.50 V(vs Al/AlF3). The corrosion rates of the anodes were calculated from the data acquired through potentiodynamic polarization. It was seen that pre-oxidised anodes possess a low corrosion rate compared to those without pre-oxidation treatment.

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Держатели документа:
Siberian Fed Univ, Lab Phys & Chem Met Proc & Mat, Krasnoyarsk, Russia.
Krasnoyarsk Sci Ctr SB RAS, Lab Mol Spect, Krasnoyarsk, Russia.
Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China.

Доп.точки доступа:
Padamata, Sai Krishna; Yasinskiy, Andrey; Shabanov, A. V.; Шабанов, Александр Васильевич; Bermeshev, Timofey; Yang, You-jian; Wang, Zhao-wen; Cao, Dao; Polyakov, Peter; State Assignment for the Science of Siberian Federal University, Russia [FSRZ-2020-0013]
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