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1.
An update on
inert anodes for aluminium electrolysis / A. S. Yasinskiy, S. K. Padamata, P. V. Polyakov, A. V. Shabanov> // Non-Ferrous Met. - 2020. -
Vol. 48
,
Is. 1
. - P. 15-23,
DOI
10.17580/nfm.2020.01.03. - Cited References: 62. - The work is performed as a part of the state assignment for the science of Siberian Federal University, project number FSRZ-2020-0013. Use of equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center “Krasnoyarsk Science Center SB RAS” is acknowledged . - ISSN 2072-0807
Кл.слова (ненормированные):
Inert anodes
--
aluminium electrolysis
--
CO2 emission
--
metallic anode
--
cermet anode
--
ceramic anode
--
oxygenevolving electrode
--
fluoride melt
--
corrosion
--
oxidation
--
low-temperature electrolyte
--
Hall-Heroult cell
Аннотация:
This update includes the literature related to the inert anodes which were published in the past decade. The metallic anodes are widely regarded as promising candidates to replace the carbon anodes due to its attractive properties like good electrical conductivity, easy to manufacture and high resistance to high thermal shocks. The metals have been tested in pure state and alloy (binary, ternary) form. The oxide scale formed on the anode surface acts as a barrier between the electrolyte and the anode, which protects the anode from being dissolved. The layer of molten fluorides is formed between the scale and the metal anode after a certain time of polarization, and the oxide scale acts as a bipolar electrode. Metal like Cu is reduced at the internal side of the scale. This paper elaborates the effects of various parameters on the performance of the anode. Cu-based alloys (Cu – Ni – Fe and Cu – Al) have shown promising results and could perform well in low-temperature electrolytes. It has been well established that the Cu content in Cu – Ni – Fe and Cu – Al alloys plays a major role in the metal dissolution as the CuO/Cu2O scales formed on the outer layer act as a sacrificial one. The
corrosion
rate of an anode can be reduced by decreasing the operating temperature, which is possible by using the KF – AlF3 melts. The use of suspensions can increase the purity of the produced metal by stop-ping the anode products to come in contact with cathode metal. Many industries including RUSAL and ELYSIS are still conducting a considerable amount of research to develop an inert anode and are expecting to have a carbon-free cell in the nearest future.
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Держатели документа:
Laboratory of Physics and Chemistry of Metallurgical Processes and Materials, Siberian Federal University, Krasnoyarsk, Russian Federation
Laboratory of Molecular Spectroscopy, Krasnoyarsk Science Center SB RAS, Krasnoyarsk, Russian Federation
Доп.точки доступа:
Yasinskiy, A. S.; Padamata, S. K.; Polyakov, P. V.; Shabanov, A. V.; Шабанов, Александр Васильевич
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2.
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, A.; Shabanov, A. V.; Шабанов, Александр Васильевич; Bermeshev, T.; Yang, Y. J.; Wang, Z. W.; Cao, D.; Polyakov, P.; State Assignment for the Science of Siberian Federal University, Russia [FSRZ-2020-0013]
}
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3.
Combined porous-monolithic TiNi
materials surface-modified with electron beam for new-generation rib endoprostheses / A. V. Shabalina, S. G. Anikeev, S. A. Kulinich [et al.]> // J. Funct. Biomater. - 2023. -
Vol. 14
,
Is. 5
. - Ст. 277,
DOI
10.3390/jfb14050277. - Cited References: 57. - The study was supported by the Russian Science Foundation (grant no. 19-79-10045). https://rscf.ru/project/19-79-10045/ . - ISSN 2079-4983
Кл.слова (ненормированные):
TiNi
--
rib endoprostheses
--
porous coating
--
powder metallurgy
--
high-current pulsed electron beam
--
structure
--
surface modification
--
electrochemical
corrosion
--
biocompatibility
Аннотация:
TiNi alloys are very widely used materials in implant fabrication. When applied in rib replacement, they are required to be manufactured as combined porous-monolithic structures, ideally with a thin, porous part well-adhered to its monolithic substrate. Additionally, good biocompatibility, high
corrosion
resistance and mechanical durability are also highly demanded. So far, all these parameters have not been achieved in one material, which is why an active search in the field is still underway. In the present study, we prepared new porous-monolithic TiNi materials by sintering a TiNi powder (0–100 μm) on monolithic TiNi plates, followed by surface modification with a high-current pulsed electron beam. The obtained materials were evaluated by a set of surface and phase analysis methods, after which their
corrosion
resistance and biocompatibility (hemolysis, cytotoxicity, and cell viability) were evaluated. Finally, cell growth tests were conducted. In comparison with flat TiNi monoliths, the newly developed materials were found to have better
corrosion
resistance, also demonstrating good biocompatibility and potential for cell growth on their surface. Thus, the newly developed porous-on-monolith TiNi materials with different surface porosity and morphology showed promise as potential new-generation implants for use in rib endoprostheses.
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Держатели документа:
Laboratory of Medical Materials Science, Tomsk State University, 634050 Tomsk, Russia
Institute of Physics, Kazan Federal University, 420008 Kazan, Russia
Research Institute of Science and Technology, Tokai University, Hiratsuka 259-1292, Kanagawa, Japan
Research School of High-Energy Physics, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia
Tomsk Scientific Center, Siberian Branch of Russian Academy of Sciences, 634055 Tomsk, Russia
Kirensky Institute of Physics, Federal Research Center, KSC Siberian Branch Russian Academy of Science, 660036 Krasnoyarsk, Russia
School of Engineering Physics and Radio Electronics, Siberian Federal University, 660041 Krasnoyarsk, Russia
Department of Morphology and Physiology of the Medical Institute, Surgut State University, 628403 Surgut, Russia
Доп.точки доступа:
Shabalina, A. V.; Anikeev, S. G.; Kulinich, S. A.; Artyukhova, N. V.; Vlasov, V. A.; Kaftaranova, M. I.; Hodorenko, V. N.; Yakovlev, E. V.; Pesterev, E. A.; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Volochaev, M. N.; Волочаев, Михаил Николаевич; Pakholkina, S.; Mamazakirov, O.; Stolyarov, V. V.; Mokshin, A. V.; Gunther, V. E.
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