Published February 2018 | Version v1
Journal article Metadata-only

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

Creators

  • 1. Zhengzhou Non-ferrous Metals Research Institute Co. Ltd of CHALCO, Zhengzhou 450011 (China)
  • 2. State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049 (China)
  • 3. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013 (China)

Description

Highlights: • ZnCr2O4 spinel processes excellent corrosion resistance in the NaF-KF-AlF3 electrolysis system. • The corrosion rate of ZnCr2O4 is calculated to be less than 0.028 cm/a. • The reason for the excellent corrosion resistance of the ZnCr2O4 is revealed. - 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 2O4 (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.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.corsci.2017.11.020

Additional details

Identifiers

DOI
10.1016/j.corsci.2017.11.020;
PII
S0010938X17315263;

Publishing Information

Journal Title
Corrosion Science
Journal Volume
131
Journal Page Range
p. 199-207
ISSN
0010-938X
CODEN
CRRSAA

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
50047281
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ALUMINIUM FLUORIDES; CHROMATES; CORROSION RESISTANCE; ELECTROLYSIS; ELECTRONEGATIVITY; EMISSION SPECTROSCOPY; ENVIRONMENT; MICROSTRUCTURE; POTASSIUM FLUORIDES; SCANNING ELECTRON MICROSCOPY; SODIUM FLUORIDES; SPINELS; STABILITY; X-RAY DIFFRACTION; ZIRCONIUM COMPOUNDS
Descriptors DEC
ALKALI METAL COMPOUNDS; ALUMINIUM COMPOUNDS; ALUMINIUM HALIDES; CHROMIUM COMPOUNDS; COHERENT SCATTERING; DIFFRACTION; ELECTRON MICROSCOPY; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; LYSIS; MICROSCOPY; MINERALS; OXIDE MINERALS; OXYGEN COMPOUNDS; POTASSIUM COMPOUNDS; POTASSIUM HALIDES; SCATTERING; SODIUM COMPOUNDS; SODIUM HALIDES; SPECTROSCOPY; TRANSITION ELEMENT COMPOUNDS

Optional Information

Copyright
Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.