A study on corrosion and deactivation mechanism of Pt/Nb anodes in sodium chlorate containing solution using EIS
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- 作者：M. Noori ; K. Jafarzadeh ; kjafarzadeh@gmail.com" class="auth_mail" title="E-mail the corresponding author ; A. Kashi ; G.H. Shirafkan
- 关键词：Platinum anode ; Electrodeposition ; Sodium perchlorate ; Accelerated life test ; EIS
- 刊名：Journal of Electroanalytical Chemistry
- 出版年：2016
- 出版时间：1 July 2016
- 年：2016
- 卷：772
- 期：Complete
- 页码：27-37
- 全文大小：3257 K
文摘
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The electrochemical production of sodium perchlorate is one of the main applications of Pt/Nb or Pt/Ti anode.
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The corrosive solution can diffuse through the cracks and cause a passive layer to form on the substrate and the platinum coating to dissolve.
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Low magnitude of Rf and high magnitude of Cf implicates low thickness of the passive layer (Nb2O5) on the substrate.
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The passivation of substrate is the main reason behind the Pt/Nb anode deactivation.