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Influence of temperature on the electrochemical and passivation behavior of 2507 super duplex stainless steel in simulated desulfurized flue gas condensates

  • Zhongyu Cui
  • , Liwei Wang*
  • , Hongtao Ni
  • , Wenkui Hao
  • , Cheng Man
  • , Shuangshuai Chen
  • , Xin Wang
  • , Zhiyong Liu
  • , Xiaogang Li
  • *Corresponding author for this work
  • Ocean University of China
  • Qingdao University
  • Global Energy Interconnection Research Institute Co. Ltd., Beijing
  • University of Science and Technology Beijing

Research output: Contribution to journalArticlepeer-review

Abstract

Influence of temperature on the electrochemical and passivation behavior of 2507 super duplex stainless steel in the simulated desulfurized flue gas condensates in thermal power plant chimney are investigated. Cathodic reactions are enhanced with temperature, accompanying with the involvement of oxygen reduction when the temperature is raised to 60 °C or higher. The unchanged semiconductor type, enrichment of Cr and thickening of the passive film are observed as the temperature increases. The temperature-induced variations of film structure and doping concentrations are responsible for the degradation of protective ability of the passive film.

Original languageEnglish
Pages (from-to)31-48
Number of pages18
JournalCorrosion Science
Volume118
DOIs
StatePublished - 1 Apr 2017
Externally publishedYes

Keywords

  • A: stainless steel
  • B: EIS
  • B: XPS
  • C: acid corrosion
  • C: passivity

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