Proceedings of the 2nd International Conference on Electronic & Mechanical Engineering and Information Technology (EMEIT 2012)

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Effect of additive BaO on corrosion resistance of xNi/10NiO-NiFe2O4 cermet inert anodes for aluminium electrolysis

Authors
Hanbing HE, Hanning XIAO
Corresponding Author
Hanbing HE
Available Online September 2012.
DOI
10.2991/emeit.2012.303How to use a DOI?
Keywords
BaO, inert anode, aluminum electrolysis, corrosion resistance, wear rate
Abstract

xNi/10NiO-NiFe2O4 cermet and 1BaO-xNi/ (10NiO-NiFe2O4) cermet (x=5,10,17) inert anodes were prepared and their corrosion resistance to Na3AlF6-Al2O3 melts was studied in laboratory electrolysis. The results show that many pores are produced and electrolytes are infiltrated inside inert anodes during electrolysis based on SEM/EDS of anode. The contamination level of nickle, iron and barium in the electrolyte reach steady state after some irregular behaviour early in the tests according to XRF of electrolyte. And the wear rate of 5Ni/(10NiO-NiFe2O4), 10Ni/(10NiO-NiFe2O4), 17Ni/(10NiO-NiFe2O4), 1BaO-5Ni/(10NiO-NiFe2O4), 1BaO-10Ni/ (10NiO-NiFe2O4) and 1BaO-17Ni/ (10NiO-NiFe2O4) is 1.23 cm•year-1,1.42 cm•year-1,0.96 cm•year-1,3.21 cm•year-1,2.37 cm•year-1 and 3.94 cm•year-1, respectively. Thus, sintering agent BaO can effectively promote the densification of xNi/10NiO-NiFe2O4 cermet(x=5,10,17) inert anodes, but the addition of 1wt.% BaO(mass fraction) to xNi/10NiO-NiFe2O4 cermet(x=5,10,17) inert anodes has negative effect on corrosion resistance, perhaps because additive BaO exists in the grain boundary, which accelerates the corrosion of xNi/10NiO-NiFe2O4 cermet(x=5,10,17) inert anode.

Copyright
© 2012, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the 2nd International Conference on Electronic & Mechanical Engineering and Information Technology (EMEIT 2012)
Series
Advances in Intelligent Systems Research
Publication Date
September 2012
ISBN
978-90-78677-60-4
ISSN
1951-6851
DOI
10.2991/emeit.2012.303How to use a DOI?
Copyright
© 2012, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

risenwbib
TY  - CONF
AU  - Hanbing HE
AU  - Hanning XIAO
PY  - 2012/09
DA  - 2012/09
TI  - Effect of additive BaO on corrosion resistance of xNi/10NiO-NiFe2O4 cermet inert anodes for aluminium electrolysis
BT  - Proceedings of the 2nd International Conference on Electronic & Mechanical Engineering and Information Technology (EMEIT 2012)
PB  - Atlantis Press
SP  - 1369
EP  - 1372
SN  - 1951-6851
UR  - https://doi.org/10.2991/emeit.2012.303
DO  - 10.2991/emeit.2012.303
ID  - HE2012/09
ER  -