Microstructure and electrolysis behavior of self-healing Cu-Ni-Fe composite inert anodes for aluminum electrowinning

被引：0

作者：

Ying Liu ^{[1
,2
]}

Yongan Zhang ^{[1
]}

Wei Wang ^{[2
]}

Dongsheng Li ^{[2
]}

Junyi Ma ^{[2
]}

机构：

[1] State Key Laboratory of Non-Ferrous Metals and Processes, General Research Institute for Nonferrous Metals

[2] Zhengzhou Non-ferrous Metals Research Institute CoLtdof CHALCO

来源：

InternationalJournalofMineralsMetallurgyandMaterials | 2018年 / 25卷 / 10期

关键词：

aluminum electrolysis; inert anode; composites; aluminum electrowinning; corrosion;

D O I：

暂无

中图分类号：

TF821 [铝]; TB33 [复合材料];

学科分类号：

080603 ; 0805 ; 080502 ;

摘要：

The microstructure evolution and electrolysis behavior of(Cu52Ni30Fe18)–x Ni Fe2O4（x=40wt%,50wt%,60wt%,and 70wt%）composite inert anodes for aluminum electrowinning were studied.Ni Fe2O4 was synthesized by solid-state reaction at 950°C.The dense anode blocks were prepared by ball-milling followed by sintering under a N2 atmosphere.The phase evolution of the anodes after sintering was determined by scanning electron microscopy and energy-dispersive X-ray spectroscopy.The results indicate that a substitution reaction between Fe in the alloy phase and Ni in the oxide phase occurs during the sintering process.The samples were also examined as inert anodes for aluminum electrowinning in the low-temperature KF–NaF–AlF3 molten electrolyte for 24 h.The cell voltage during electrolysis and the corrosion scale on the anodes were analyzed.The results confirm that the scale has a self-repairing function because of the synergistic reaction between the alloy phase with Fe added and the oxide phase.The estimated wear rate of the(Cu52Ni30Fe18)–50Ni Fe2O4 composite anode is 2.02 cm·a-1.

引用

页码：1208 / 1216

页数：9

共 15 条

[1]

Corrosion of NiFe 2 O 4 –10NiO-based cermet inert anodes for aluminium electrolysis[J] . Han-bing HE,Yuan WANG,Jia-ju LONG,Zhao-hui CHEN.Transactions of Nonferrous Metals Society of China . 2013 (12)

[2]

Anodic behaviour of the Cu 82 Al 8 Ni 5 Fe 5 alloy in low-temperature aluminium electrolysis[J] . А.P. Khramov,V.А. Kovrov,Yu.P. Zaikov,V.M. Chumarev.Corrosion Science . 2013

[3]

Anodic behavior of mechanically alloyed Cu–Ni–Fe and Cu–Ni–Fe–O electrodes for aluminum electrolysis in low-temperature KF-AlF 3 electrolyte[J] . G. Goupil,S. Helle,B. Davis,D. Guay,L. Roué.Electrochimica Acta . 2013

[4]

Consolidation of mechanically alloyed Cu–Ni–Fe material by spark plasma sintering and evaluation as inert anode for aluminum electrolysis[J] . Gregory Goupil,Guillaume Bonnefont,Hassane Idrissi,Daniel Guay,Lionel Roué.Journal of Alloys and Compounds . 2013

[5]

Oxidation and corrosion of highly alloyed Cu–Fe–Ni as inert anode material for aluminum electrowinning in as-cast and homogenized conditions[J] . I. Gallino,M.E. Kassner,R. Busch.Corrosion Science . 2012

[6]

Microstructural Evolution of a Nickel Ferrite–Copper Alloy Cermet During Sintering and High‐Temperature Oxidation[J] . Yuqiang Tao,Zhiyou Li,Dou Zhang,Huiwen Xiong,Kechao Zhou.J. Am. Ceram. Soc. . 2012 (10)

[7] Phase evolution of 17(Cu-10Ni)-(NiFe2O4-10NiO) cermet inert anode during aluminum electrolysis [J].

Liu Jian-yuan ;

Li Zhi-you ;

Tao Yu-qiang ;

Zhang Dou ;

Zhou Ke-chao .

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2011, 21 (03) :566-572

[8]

Hot corrosion of a novel NiO/NiFe 2 O 4 composite coating thermally converted from the electroplated Ni–Fe alloy[J] . Li Ma,Kechao Zhou,Zhiyou Li,Qiuping Wei,Lei Zhang.Corrosion Science . 2011 (11)

[9]

Influence of the iron content in Cu–Ni based inert anodes on their corrosion resistance for aluminium electrolysis[J] . S. Helle,B. Brodu,B. Davis,D. Guay,L. Roué.Corrosion Science . 2011 (10)

[10] Physicochemical properties of KF-NaF-AlF3 molten electrolytes [J].

Apisarov, A. P. ;

Dedyukhin, A. E. ;

Red'kin, A. A. ;

Tkacheva, O. Yu ;

Zaikov, Yu P. .

RUSSIAN JOURNAL OF ELECTROCHEMISTRY, 2010, 46 (06) :633-639

← 1 2 →