Abstract
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 MgSeO3 hydrate, and polymerization of amorphous selenium.
Original language | English |
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Article number | 286 |
Pages (from-to) | 1-9 |
Number of pages | 9 |
Journal | Materials |
Volume | 14 |
Issue number | 2 |
DOIs | |
State | Published - Jan 2 2021 |
Bibliographical note
Publisher Copyright:© 2021 by the authors. Li-censee MDPI, Basel, Switzerland.
Keywords
- Corrosion
- EIS
- Magnesium
- Selenite
- Selenium
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics