Corrosion resistance of the ZnCr2O4 spinel in NaF-KF-AlF3 bath

Zhiyuan Li; Zhongqi Shi; Zhejian Zhang; Rongdi Liu; Ying Liu; Jing Li; Guanjun Qiao

doi:10.1016/j.corsci.2017.11.020

Corrosion resistance of the ZnCr₂O₄ spinel in NaF-KF-AlF₃ bath

Zhiyuan Li
, Zhongqi Shi
, Zhejian Zhang
, Rongdi Liu
, Ying Liu
, Jing Li
, Guanjun Qiao

School of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

ZnCr₂O₄ was evaluated as a new sidewall material in the electrolysis of NaF_19.69-KF_25.84-(AlF₃)_54.47 bath at 800 °C by both static and dynamic corrosion tests. The results showed that the composition and microstructure of ZnCr₂O₄ were stable after the tests, and the ZnCr₂O₄ possessed excellent corrosion resistance with the corrosion rate <0.028 cm/a, which was significantly lower than that of a common inert material NiFe₂O₄ (1.2 cm/a). The outstanding corrosion resistance of ZnCr₂O₄ can not only owe to the low electronegativity of Zn and Cr elements in the spinel structure, but also because of its thermodynamically stability under the chemical corrosion and reduction environments.

Original language	English
Pages (from-to)	199-207
Number of pages	9
Journal	Corrosion Science
Volume	131
DOIs	https://doi.org/10.1016/j.corsci.2017.11.020
State	Published - Feb 2018

Keywords

Ceramic
Hot corrosion
ICP-OES
SEM
XRD

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10.1016/j.corsci.2017.11.020

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title = "Corrosion resistance of the ZnCr2O4 spinel in NaF-KF-AlF3 bath",

abstract = "ZnCr2O4 was evaluated as a new sidewall material in the electrolysis of NaF19.69-KF25.84-(AlF3)54.47 bath at 800 °C by both static and dynamic corrosion tests. The results showed that the composition and microstructure of ZnCr2O4 were stable after the tests, and the ZnCr2O4 possessed excellent corrosion resistance with the corrosion rate <0.028 cm/a, which was significantly lower than that of a common inert material NiFe2O4 (1.2 cm/a). The outstanding corrosion resistance of ZnCr2O4 can not only owe to the low electronegativity of Zn and Cr elements in the spinel structure, but also because of its thermodynamically stability under the chemical corrosion and reduction environments.",

keywords = "Ceramic, Hot corrosion, ICP-OES, SEM, XRD",

author = "Zhiyuan Li and Zhongqi Shi and Zhejian Zhang and Rongdi Liu and Ying Liu and Jing Li and Guanjun Qiao",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

year = "2018",

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doi = "10.1016/j.corsci.2017.11.020",

language = "英语",

volume = "131",

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journal = "Corrosion Science",

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T1 - Corrosion resistance of the ZnCr2O4 spinel in NaF-KF-AlF3 bath

AU - Li, Zhiyuan

AU - Shi, Zhongqi

AU - Zhang, Zhejian

AU - Liu, Rongdi

AU - Liu, Ying

AU - Li, Jing

AU - Qiao, Guanjun

PY - 2018/2

Y1 - 2018/2

N2 - ZnCr2O4 was evaluated as a new sidewall material in the electrolysis of NaF19.69-KF25.84-(AlF3)54.47 bath at 800 °C by both static and dynamic corrosion tests. The results showed that the composition and microstructure of ZnCr2O4 were stable after the tests, and the ZnCr2O4 possessed excellent corrosion resistance with the corrosion rate <0.028 cm/a, which was significantly lower than that of a common inert material NiFe2O4 (1.2 cm/a). The outstanding corrosion resistance of ZnCr2O4 can not only owe to the low electronegativity of Zn and Cr elements in the spinel structure, but also because of its thermodynamically stability under the chemical corrosion and reduction environments.

AB - ZnCr2O4 was evaluated as a new sidewall material in the electrolysis of NaF19.69-KF25.84-(AlF3)54.47 bath at 800 °C by both static and dynamic corrosion tests. The results showed that the composition and microstructure of ZnCr2O4 were stable after the tests, and the ZnCr2O4 possessed excellent corrosion resistance with the corrosion rate <0.028 cm/a, which was significantly lower than that of a common inert material NiFe2O4 (1.2 cm/a). The outstanding corrosion resistance of ZnCr2O4 can not only owe to the low electronegativity of Zn and Cr elements in the spinel structure, but also because of its thermodynamically stability under the chemical corrosion and reduction environments.

KW - Ceramic

KW - Hot corrosion

KW - ICP-OES

KW - SEM

KW - XRD

UR - https://www.scopus.com/pages/publications/85035118554

U2 - 10.1016/j.corsci.2017.11.020

DO - 10.1016/j.corsci.2017.11.020

M3 - 文章

AN - SCOPUS:85035118554

SN - 0010-938X

VL - 131

SP - 199

EP - 207

JO - Corrosion Science

JF - Corrosion Science

ER -

Corrosion resistance of the ZnCr₂O₄ spinel in NaF-KF-AlF₃ bath

Abstract

Keywords

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