Тип публикации: статья из журнала
Год издания: 2022
Идентификатор DOI: 10.1016/S1003-6326(22)65800-X
Ключевые слова: aluminium electrolysis, corrosion, cu−al alloys, inert anodes, oxygen-evolving electrodes, potassium cryolite
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 witПоказать полностьюh 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. © 2022 The Nonferrous Metals Society of China
Журнал: Transactions of Nonferrous Metals Society of China (English Edition)
Выпуск журнала: Vol. 32, Is. 1
Номера страниц: 354-363
ISSN журнала: 10036326
Издатель: Nonferrous Metals Society of China