Correlation Between the Pitting Potential Evolution and σ Phase Precipitation Kinetics in the 2205 Duplex Stainless Steel

The aim of this work is to correlate the pitting potential ( E pit ) evolution with the kinetics of σ phase precipitation in the 2205 duplex stainless steel aged at 850 °C after solution treatment at 1150 °C. The potentiodynamic polarization curves indicate a reduction of the pitting corrosion resis...

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Bibliographic Details
Published in:Journal of materials engineering and performance 2018-08, Vol.27 (8), p.3911-3919
Main Authors: Djama, Mustapha, Saidi, Djaffar, Kadri, Abdelaziz, Kherrouba, Nabil, Mehdi, Brahim, Mathieu, Stéphane, Schweitzer, Thierry, Brahim, Idir
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemical Sciences
Chemistry and Materials Science
Corrosion and Coatings
Engineering Design
Materials Science
Quality Control
Reliability
Safety and Risk
Tribology
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Summary:The aim of this work is to correlate the pitting potential ( E pit ) evolution with the kinetics of σ phase precipitation in the 2205 duplex stainless steel aged at 850 °C after solution treatment at 1150 °C. The potentiodynamic polarization curves indicate a reduction of the pitting corrosion resistance with the aging time, which is revealed by a decrease in the E pit values from 0.65 to 0.40 V SCE . Thus, E pit values are used to determine the kinetics parameters of the σ phase precipitation. The experimental transformed fraction agrees well with the one calculated by using the modified Kolmogorov–Johnson–Mehl–Avrami equation with an impingement parameter c  = 0.6.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-018-3482-8