Skip to Main content Skip to Navigation
Journal articles

On the Depassivation Mechanism of Lean Duplex Stainless Steels and the Influence of the Partitioning of the Alloying Elements

Abstract : The depassivation of UNS S32304, S32202, and S32101 lean duplex stainless steels (DSS) in 26 wt% sodium chloride (NaCl) was investigated by potentiodynamic polarization to understand the selective dissolution processes in localized corrosion phenomena. Results showed that the depassivation of the three grades proceeds in two stages. First, the austenite is the only phase depassivated within the range of no more than 0.3 pH units, providing a single corrosion peak on the polarization curves of the DSS. Subsequently, the ferrite is also depassivated and provides a second corrosion peak at a more cathodic potential. Results are discussed in terms of the partitioning of alloying elements.
Document type :
Journal articles
Complete list of metadatas

https://hal-emse.ccsd.cnrs.fr/emse-01157874
Contributor : Géraldine Fournier-Moulin <>
Submitted on : Thursday, May 28, 2015 - 5:14:02 PM
Last modification on : Wednesday, June 24, 2020 - 4:19:09 PM

Identifiers

Collections

Citation

Fiona Ruel, D. Tite, A. Gaugain, S. Saedlou, Krzysztof Wolski. On the Depassivation Mechanism of Lean Duplex Stainless Steels and the Influence of the Partitioning of the Alloying Elements. Corrosion, National Association of Corrosion Engineers, 2014, 70 (6), pp.636-642. ⟨10.5006/1173⟩. ⟨emse-01157874⟩

Share

Metrics

Record views

181