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Singh, H., Xiong, Y., Rani, E. et al. Unveiling nano-scaled chemical inhomogeneity impacts on corrosion of Ce-modified 2507 super-duplex stainless steels. npj Mater Degrad 6, 54 (2022). https://doi.org/10.1038/s41529-022-00263-z

Unveiling nano-scaled chemical inhomogeneity impacts on corrosion of Ce-modified 2507 super-duplex stainless steels

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Author: Singh, Harishchandra1; Xiong, Yi2,3; Rani, Ekta1;
Organizations: 1Nano and Molecular Systems Research Unit, University of Oulu, 90014 Oulu, Finland
2School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023 Henan, China
3Collaborative Innovation Center of Nonferrous Metals, Henan University of Science and Technology, Luoyang 471023 Henan, China
4MAX IV Laboratory, Lund University, P.O. Box 118, 22100 Lund, Sweden
5Canadian Light Source, 44 Innovation Blvd, Saskatoon, Saskatchewan S7N 2V3, Canada
6Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
7Materials and Mechanical Engineering, Centre for Advanced Steels Research, University of Oulu, 90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 3.6 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2023050541221
Language: English
Published: Springer Nature, 2022
Publish Date: 2023-05-05
Description:

Abstract

The widely used stainless steels and their deformed variants are anticorrosive in ambient conditions due to passivation layers composed of chromium oxides. Conventionally, corrosion and erosion of the steels are attributed to the breakdown of such layers but seldomly to the origin that depends on surface heterogeneity at the microscopic level. In this work, the nanometer-scaled chemical heterogeneity at the surface unveiled via spectro-microscopy and chemometric analysis unexpectedly dominates the breakdown and corrosion behavior of the cold-rolled Ce-modified 2507 super-duplex stainless steels (SDSS) over its hot-deformed counterpart. Though relatively uniformly covered by a native Cr2O3 layer revealed by X-ray photoemission electron microscopy, the cold-rolled SDSS behaved poorly in passivity because of locally distributed Fe3+ rich nano-islands over the Fe/Cr oxide layer. This atomic-level knowledge provides a deep understanding of corrosion of stainless steel and is expected to benefit corrosion controls of similar high-alloyed metals.

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Series: npj materials degradation
ISSN: 2397-2106
ISSN-E: 2397-2106
ISSN-L: 2397-2106
Volume: 6
Issue: 1
Article number: 54
DOI: 10.1038/s41529-022-00263-z
OADOI: https://oadoi.org/10.1038/s41529-022-00263-z
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Corrosion
Imaging techniques
Metals and alloys
Article
Funding: The Academy of Finland (grant #311934) and National Natural Science Foundation of China (grant numbers U1804146 and 52111530068) are acknowledged for the financial supports.
Dataset Reference: The online version contains supplementary material.
Copyright information: © The Author(s) 2022. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
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