New insights into the effects of surface nanocrystallization on the oxidation of 321 austenitic stainless steel in a humid oxygen environment at 1000 degrees C

Pour-Ali S, Kiani-Rashid AR, Babakhani A, Norouzi M, Virtanen S (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Corrosion Science Elsevier

Book Volume: 147

Pages Range: 231-245

DOI: 10.1016/j.corsci.2018.11.024

Abstract

Oxidation behaviour of surface nanocrystallized 321 austenitic stainless steel (SN-321ASS) and its conventional polycrystalline counterpart (CP-321ASS) in O-2 + 10% H2O at 1000 degrees C was comparatively investigated. Uniform dense distribution of high diffusivity paths on the SN-321ASS greatly enhances the Cr and Mn diffusion throughout the oxidation front. Consequently: (i) formation of a thicker Cr-rich inner oxide layer on the SN-321ASS leads to a superior oxidation resistance, (ii) formation of Mn-rich spinel oxide as a uniform intermediate layer interrupts the easy access of oxygen and/or water to the Cr-rich inner oxide layer, thereby reducing the Cr-vaporization.

Authors with CRIS profile

Sannakaisa Virtanen Professur für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)

Involved external institutions

Ferdowsi University of Mashhad IR Iran, Islamic Republic of (IR) Huazhong University of Science & Technology CN China (CN)

How to cite

APA:

Pour-Ali, S., Kiani-Rashid, A.-R., Babakhani, A., Norouzi, M., & Virtanen, S. (2019). New insights into the effects of surface nanocrystallization on the oxidation of 321 austenitic stainless steel in a humid oxygen environment at 1000 degrees C. Corrosion Science, 147, 231-245. https://doi.org/10.1016/j.corsci.2018.11.024

MLA:

Pour-Ali, Sadegh, et al. "New insights into the effects of surface nanocrystallization on the oxidation of 321 austenitic stainless steel in a humid oxygen environment at 1000 degrees C." Corrosion Science 147 (2019): 231-245.

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