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This paper investigated the corrosion behaviors of Ti3AlC2 at 700 ℃ in molten KOH with various mass ratios. If the mass ratio of KOH:Ti3AlC2≤2, Ti3AlC2 can resist KOH hot corrosion in 2 h. Ti3AlC2 suffered serious corrosion attack if the mass ratio≥3. The main compositions of corroded samples were amorphous graphite and potassium titanates (K2nTiO2). If the samples were washed by acid and dried, potassium titanates could decompose to K2O and amorphous rutile. Based on the experimental results, a corrosion mechanism of Ti3AlC2 in molten KOH was proposed.


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Corrosion behavior of Ti3AlC2 in molten KOH at 700 °C

Show Author's information Dandan SUNAiguo ZHOU*( )Zhengyang LILibo WANG
Cultivating Base for Key Laboratory of Environment-friendly Inorganic Materials in University of Henan Province, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China

Abstract

This paper investigated the corrosion behaviors of Ti3AlC2 at 700 ℃ in molten KOH with various mass ratios. If the mass ratio of KOH:Ti3AlC2≤2, Ti3AlC2 can resist KOH hot corrosion in 2 h. Ti3AlC2 suffered serious corrosion attack if the mass ratio≥3. The main compositions of corroded samples were amorphous graphite and potassium titanates (K2nTiO2). If the samples were washed by acid and dried, potassium titanates could decompose to K2O and amorphous rutile. Based on the experimental results, a corrosion mechanism of Ti3AlC2 in molten KOH was proposed.

Keywords:

Ti3AlC2, Raman spectroscopy, alkaline corrosion, hot corrosion
Received: 07 April 2013 Revised: 23 July 2013 Accepted: 08 August 2013 Published: 04 December 2013 Issue date: December 2013
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Publication history

Received: 07 April 2013
Revised: 23 July 2013
Accepted: 08 August 2013
Published: 04 December 2013
Issue date: December 2013

Copyright

© The author(s) 2013

Acknowledgements

This work was supported by the National Nature Science Foundation of China (Grant Nos. 51002045, 51205111), Program for Innovative Research Team of Henan Polytechnic University (T2013-4), and Opening Project of Henan Key Discipline Open Laboratory of Mining Engineering Materials (MEM12-5).

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