Application of bipolar electrochemistry to assess the ambient temperature corrosion resistance of solution annealed type 2205 duplex stainless steel

Yiqi Zhou, Dirk Engelberg

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Abstract

The corrosion resistance of solution annealing heat-treated type 2205 duplex stainless steel microstructures was assessed with a bipolar electrochemistry technique. Chemical element partitioning in both crystallographic phases was correlated to simulations of critical pitting temperatures. The as-received microstructure had the highest pit nucleation resistance, with high-temperature solution annealing treatment revealing reduced pit growth rates. Pit nucleation occurred either within the ferrite phase or at ferrite-austenite interfaces, with the resulting pit shape affected by the microstructure characteristics. The results of this study are discussed in the framework of microstructure design for enhanced corrosion resistance in duplex stainless steels.
Original languageEnglish
Article number125183
Number of pages10
JournalMaterials Chemistry and Physics
Volume275
DOIs
Publication statusPublished - 1 Jan 2022

Keywords

  • Bipolar electrochemistry
  • Corrosion
  • Duplex stainless steel
  • Pitting
  • Solution annealing

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