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Revealing How Alkali Cations Affect the Surface Reactivity of Stainless Steel in Alkaline Aqueous Environments
[Image: see text] Stainless steel is a ubiquitous structural material and one that finds extensive use in core-internal components in nuclear power plants. Stainless steel features superior corrosion resistance (e.g., as compared to ordinary steel) due to the formation of passivating iron and/or chr...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2018
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6644133/ https://www.ncbi.nlm.nih.gov/pubmed/31458146 http://dx.doi.org/10.1021/acsomega.8b02227 |
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author | Giron, Rachel Guia P. Chen, Xin La Plante, Erika Callagon Gussev, Maxim N. Leonard, Keith J. Sant, Gaurav |
author_facet | Giron, Rachel Guia P. Chen, Xin La Plante, Erika Callagon Gussev, Maxim N. Leonard, Keith J. Sant, Gaurav |
author_sort | Giron, Rachel Guia P. |
collection | PubMed |
description | [Image: see text] Stainless steel is a ubiquitous structural material and one that finds extensive use in core-internal components in nuclear power plants. Stainless steel features superior corrosion resistance (e.g., as compared to ordinary steel) due to the formation of passivating iron and/or chromium oxides on its surfaces. However, the breakdown of such passivating oxide films, e.g., due to localized deformation and slip line formation following exposure to radiation, or aggressive ions renders stainless steel susceptible to corrosion-related degradation. Herein, the effects of alkali cations (i.e., K(+), Li(+)) and the interactions between the passivated steel surface and the solution are examined using 304L stainless steel. Scanning electrochemical microscopy and atomic force microscopy are used to examine the inert-to-reactive transition of the steel surface both in the native state and in the presence of applied potentials. Careful analysis of interaction forces, in solution, within ≤10 nm of the steel surface, reveals that the interaction between the hydrated alkali cations and the substrate affects the structure of the electrical double layer (EDL). As a result, a higher surface reactivity is indicated in the presence of Li(+) relative to K(+) due to the effects of the former species in disrupting the EDL. These findings provide new insights into the role of the water chemistry not only on affecting metallic corrosion but also in other applications, such as batteries and electrochemical devices. |
format | Online Article Text |
id | pubmed-6644133 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-66441332019-08-27 Revealing How Alkali Cations Affect the Surface Reactivity of Stainless Steel in Alkaline Aqueous Environments Giron, Rachel Guia P. Chen, Xin La Plante, Erika Callagon Gussev, Maxim N. Leonard, Keith J. Sant, Gaurav ACS Omega [Image: see text] Stainless steel is a ubiquitous structural material and one that finds extensive use in core-internal components in nuclear power plants. Stainless steel features superior corrosion resistance (e.g., as compared to ordinary steel) due to the formation of passivating iron and/or chromium oxides on its surfaces. However, the breakdown of such passivating oxide films, e.g., due to localized deformation and slip line formation following exposure to radiation, or aggressive ions renders stainless steel susceptible to corrosion-related degradation. Herein, the effects of alkali cations (i.e., K(+), Li(+)) and the interactions between the passivated steel surface and the solution are examined using 304L stainless steel. Scanning electrochemical microscopy and atomic force microscopy are used to examine the inert-to-reactive transition of the steel surface both in the native state and in the presence of applied potentials. Careful analysis of interaction forces, in solution, within ≤10 nm of the steel surface, reveals that the interaction between the hydrated alkali cations and the substrate affects the structure of the electrical double layer (EDL). As a result, a higher surface reactivity is indicated in the presence of Li(+) relative to K(+) due to the effects of the former species in disrupting the EDL. These findings provide new insights into the role of the water chemistry not only on affecting metallic corrosion but also in other applications, such as batteries and electrochemical devices. American Chemical Society 2018-11-01 /pmc/articles/PMC6644133/ /pubmed/31458146 http://dx.doi.org/10.1021/acsomega.8b02227 Text en Copyright © 2018 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Giron, Rachel Guia P. Chen, Xin La Plante, Erika Callagon Gussev, Maxim N. Leonard, Keith J. Sant, Gaurav Revealing How Alkali Cations Affect the Surface Reactivity of Stainless Steel in Alkaline Aqueous Environments |
title | Revealing How Alkali Cations Affect the Surface Reactivity
of Stainless Steel in Alkaline Aqueous Environments |
title_full | Revealing How Alkali Cations Affect the Surface Reactivity
of Stainless Steel in Alkaline Aqueous Environments |
title_fullStr | Revealing How Alkali Cations Affect the Surface Reactivity
of Stainless Steel in Alkaline Aqueous Environments |
title_full_unstemmed | Revealing How Alkali Cations Affect the Surface Reactivity
of Stainless Steel in Alkaline Aqueous Environments |
title_short | Revealing How Alkali Cations Affect the Surface Reactivity
of Stainless Steel in Alkaline Aqueous Environments |
title_sort | revealing how alkali cations affect the surface reactivity
of stainless steel in alkaline aqueous environments |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6644133/ https://www.ncbi.nlm.nih.gov/pubmed/31458146 http://dx.doi.org/10.1021/acsomega.8b02227 |
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