Characterization of the passive layer on ferrite and austenite phases of super duplex stainless steel
Rahimi E, Kosari A, Hosseinpour S, Davoodi A, Zandbergen H, Mol JM (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 496
Article Number: 143634
DOI: 10.1016/j.apsusc.2019.143634
Abstract
In this study, we report on a combined microscopic, analytical and electrochemical characterization of the nanoscopic passive layer on a tungsten‑molybdenum-containing super duplex stainless steel. We used scanning transmission electron microscopy/energy dispersive X-ray spectroscopy, scanning Kelvin probe force microscopy, scanning tunneling spectroscopy, and Mott–Schottky electrochemical impedance spectroscopy analysis to correlate the local chemical composition and electronic properties of passive layers on austenite and ferrite phases. The passive layer on the ferrite phase contains a higher amount of Mo, W, and Cr, which accommodates a higher nobility of ferrite and a higher local energy of the band gap compared to those on the austenite. The two aforementioned phases exhibit a different composition and semi-conductive properties of their passive layers leading to dissimilar local corrosion susceptibility. These findings are of pivotal importance in further studies of austenite and ferrite phase resolved corrosion resistance of duplex stainless steel demanding a dedicated alloying strategy.
Authors with CRIS profile
Involved external institutions
Ferdowsi University of Mashhad
Iran, Islamic Republic of (IR)
Delft University of Technology (TU Delft)
Netherlands (NL)
Kavli Institute of Nanoscience Delft
Netherlands (NL)
Iran, Islamic Republic of (IR)
Delft University of Technology (TU Delft)
Netherlands (NL)
Kavli Institute of Nanoscience Delft
Netherlands (NL)
How to cite
APA:
Rahimi, E., Kosari, A., Hosseinpour, S., Davoodi, A., Zandbergen, H., & Mol, J.M. (2019). Characterization of the passive layer on ferrite and austenite phases of super duplex stainless steel. Applied Surface Science, 496. https://dx.doi.org/10.1016/j.apsusc.2019.143634
MLA:
Rahimi, E., et al. "Characterization of the passive layer on ferrite and austenite phases of super duplex stainless steel." Applied Surface Science 496 (2019).
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