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Electrochemical Descaling of Metal Oxides from Stainless Steel Using an Ionic Liquid–Acid Solution

[Image: see text] Oxide scales often formed on the surface of stainless steel, and it is of high interest to descale the surface oxide effectively and environment-friendly during steel smelting and engineering processing. It is generally done by treating the oxide layer under strong and harsh mixed...

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Autores principales: Lee, Jungeun, Kang, Yeji, Kim, Jin-Suk, Park, Jongdeuk, Lee, Jae-Joon, Kim, Byung-Kwon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7331208/
https://www.ncbi.nlm.nih.gov/pubmed/32637846
http://dx.doi.org/10.1021/acsomega.0c02163
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author Lee, Jungeun
Kang, Yeji
Kim, Jin-Suk
Park, Jongdeuk
Lee, Jae-Joon
Kim, Byung-Kwon
author_facet Lee, Jungeun
Kang, Yeji
Kim, Jin-Suk
Park, Jongdeuk
Lee, Jae-Joon
Kim, Byung-Kwon
author_sort Lee, Jungeun
collection PubMed
description [Image: see text] Oxide scales often formed on the surface of stainless steel, and it is of high interest to descale the surface oxide effectively and environment-friendly during steel smelting and engineering processing. It is generally done by treating the oxide layer under strong and harsh mixed acid (HNO(3) + HF) conditions or in a strong molten salt (NaOH + NaNO(3)) environment at high temperatures, while the generation of very harmful and environmentally hazardous gases, such as NO(x), is inevitable. A novel, simple, fast, and environment-friendly electrochemical method at ambient temperature is proposed in this research to remove the oxide scale from the stainless steel surface using an ionic liquid with a small amount of HCl. It was found that the optimized electrochemical anodization treatment in an ionic liquid environment could significantly improve the descaling efficiency at least 50 times faster than the simple passive and slow dissolution in a mixture of an ionic liquid and a concentrated acid.
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spelling pubmed-73312082020-07-06 Electrochemical Descaling of Metal Oxides from Stainless Steel Using an Ionic Liquid–Acid Solution Lee, Jungeun Kang, Yeji Kim, Jin-Suk Park, Jongdeuk Lee, Jae-Joon Kim, Byung-Kwon ACS Omega [Image: see text] Oxide scales often formed on the surface of stainless steel, and it is of high interest to descale the surface oxide effectively and environment-friendly during steel smelting and engineering processing. It is generally done by treating the oxide layer under strong and harsh mixed acid (HNO(3) + HF) conditions or in a strong molten salt (NaOH + NaNO(3)) environment at high temperatures, while the generation of very harmful and environmentally hazardous gases, such as NO(x), is inevitable. A novel, simple, fast, and environment-friendly electrochemical method at ambient temperature is proposed in this research to remove the oxide scale from the stainless steel surface using an ionic liquid with a small amount of HCl. It was found that the optimized electrochemical anodization treatment in an ionic liquid environment could significantly improve the descaling efficiency at least 50 times faster than the simple passive and slow dissolution in a mixture of an ionic liquid and a concentrated acid. American Chemical Society 2020-06-19 /pmc/articles/PMC7331208/ /pubmed/32637846 http://dx.doi.org/10.1021/acsomega.0c02163 Text en Copyright © 2020 American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes.
spellingShingle Lee, Jungeun
Kang, Yeji
Kim, Jin-Suk
Park, Jongdeuk
Lee, Jae-Joon
Kim, Byung-Kwon
Electrochemical Descaling of Metal Oxides from Stainless Steel Using an Ionic Liquid–Acid Solution
title Electrochemical Descaling of Metal Oxides from Stainless Steel Using an Ionic Liquid–Acid Solution
title_full Electrochemical Descaling of Metal Oxides from Stainless Steel Using an Ionic Liquid–Acid Solution
title_fullStr Electrochemical Descaling of Metal Oxides from Stainless Steel Using an Ionic Liquid–Acid Solution
title_full_unstemmed Electrochemical Descaling of Metal Oxides from Stainless Steel Using an Ionic Liquid–Acid Solution
title_short Electrochemical Descaling of Metal Oxides from Stainless Steel Using an Ionic Liquid–Acid Solution
title_sort electrochemical descaling of metal oxides from stainless steel using an ionic liquid–acid solution
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7331208/
https://www.ncbi.nlm.nih.gov/pubmed/32637846
http://dx.doi.org/10.1021/acsomega.0c02163
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