Enhancing Corrosion Resistance in 2507 Super Duplex Stainless Steel: The Impact of Artificial Aging on Microstructure and Phase Stability

Bouzid Maamache; Naima Ouali; Brahim Belkessa; Mohamed Trari; Ramdhane Kouba; Billel Cheniti

doi:10.4028/p-m8iIIO

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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 159Enhancing Corrosion Resistance in 2507 Super...

Enhancing Corrosion Resistance in 2507 Super Duplex Stainless Steel: The Impact of Artificial Aging on Microstructure and Phase Stability

Abstract:

This study examines the corrosion behavior of 2507 super duplex stainless steel (SDSS) subjected to artificial aging at various temperatures. Using optical microscopy, SEM, EDS, and XRD, we characterized the microstructural and phase changes. Electrochemical tests, including Tafel polarization and EIS, assessed corrosion resistance in 3.5 wt. % NaCl solution. Results show that aging at 1200°C enhances corrosion resistance, attributed to the dissolution of secondary phases and an increase in ferrite content. The optimized microstructure achieved at this temperature displayed the lowest corrosion current density and highest polarization resistance, offering insights for improving SDSS durability in corrosive environments.

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Periodical:

Advances in Science and Technology (Volume 159)

Pages:

55-61

DOI:

https://doi.org/10.4028/p-m8iIIO

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Online since:

January 2025

Authors:

Bouzid Maamache*, Naima Ouali, Brahim Belkessa, Mohamed Trari, Ramdhane Kouba, Billel Cheniti

Keywords:

2507 SDSS, Aging, Corrosion Resistance, Microstructure, Phase Transformation

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