Corrosion Protective Film Formation on Mg Alloy AZ31 by Exposure to Dilute Selenite Solutions

The study of protective film formation on Mg alloys by exposure to sodium selenite solutions was conducted. Anodic polarization studies, electrochemical impedance spectroscopy studies, morphological analysis, and Energy-dispersive X-ray spectroscopy were performed on AZ31 Mg alloy after coating trea...

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Autores principales: Feng, Zhiyuan, Xu, Charles C., Zhang, Dadi, Buchheit, Rudolph
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7827045/
https://www.ncbi.nlm.nih.gov/pubmed/33429928
http://dx.doi.org/10.3390/ma14020286
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author Feng, Zhiyuan
Xu, Charles C.
Zhang, Dadi
Buchheit, Rudolph
author_facet Feng, Zhiyuan
Xu, Charles C.
Zhang, Dadi
Buchheit, Rudolph
author_sort Feng, Zhiyuan
collection PubMed
description The study of protective film formation on Mg alloys by exposure to sodium selenite solutions was conducted. Anodic polarization studies, electrochemical impedance spectroscopy studies, morphological analysis, and Energy-dispersive X-ray spectroscopy were performed on AZ31 Mg alloy after coating treatment in different concentrations of sodium selenite. The corrosion resistance was improved by around 5 times compared with control. Improved resistance to localized corrosion was observed in the coatings treated by 5 mM or 10 mM sodium selenite. The protection mechanism was ascribed to the transformation of selenite to insoluble selenium, the formation of insoluble MgSeO(3) hydrate, and polymerization of amorphous selenium.
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spelling pubmed-78270452021-01-25 Corrosion Protective Film Formation on Mg Alloy AZ31 by Exposure to Dilute Selenite Solutions Feng, Zhiyuan Xu, Charles C. Zhang, Dadi Buchheit, Rudolph Materials (Basel) Article The study of protective film formation on Mg alloys by exposure to sodium selenite solutions was conducted. Anodic polarization studies, electrochemical impedance spectroscopy studies, morphological analysis, and Energy-dispersive X-ray spectroscopy were performed on AZ31 Mg alloy after coating treatment in different concentrations of sodium selenite. The corrosion resistance was improved by around 5 times compared with control. Improved resistance to localized corrosion was observed in the coatings treated by 5 mM or 10 mM sodium selenite. The protection mechanism was ascribed to the transformation of selenite to insoluble selenium, the formation of insoluble MgSeO(3) hydrate, and polymerization of amorphous selenium. MDPI 2021-01-08 /pmc/articles/PMC7827045/ /pubmed/33429928 http://dx.doi.org/10.3390/ma14020286 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Feng, Zhiyuan
Xu, Charles C.
Zhang, Dadi
Buchheit, Rudolph
Corrosion Protective Film Formation on Mg Alloy AZ31 by Exposure to Dilute Selenite Solutions
title Corrosion Protective Film Formation on Mg Alloy AZ31 by Exposure to Dilute Selenite Solutions
title_full Corrosion Protective Film Formation on Mg Alloy AZ31 by Exposure to Dilute Selenite Solutions
title_fullStr Corrosion Protective Film Formation on Mg Alloy AZ31 by Exposure to Dilute Selenite Solutions
title_full_unstemmed Corrosion Protective Film Formation on Mg Alloy AZ31 by Exposure to Dilute Selenite Solutions
title_short Corrosion Protective Film Formation on Mg Alloy AZ31 by Exposure to Dilute Selenite Solutions
title_sort corrosion protective film formation on mg alloy az31 by exposure to dilute selenite solutions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7827045/
https://www.ncbi.nlm.nih.gov/pubmed/33429928
http://dx.doi.org/10.3390/ma14020286
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AT xucharlesc corrosionprotectivefilmformationonmgalloyaz31byexposuretodiluteselenitesolutions
AT zhangdadi corrosionprotectivefilmformationonmgalloyaz31byexposuretodiluteselenitesolutions
AT buchheitrudolph corrosionprotectivefilmformationonmgalloyaz31byexposuretodiluteselenitesolutions

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