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.
Document Type
Article
Publication Date
1-8-2021
Digital Object Identifier (DOI)
https://doi.org/10.3390/ma14020286
Funding Information
This research was funded by The Army Research Laboratory grant number W911NF-14-2- 0004.
Related Content
The following are available online at https://www.mdpi.com/1996-194 4/14/2/286/s1, Figure S1: Bode plot for control, Figure S2: Bode Plot for 1 mM Selenite, Figure S3: Bode Plot for 5 mM Selenite, Figure S4: Bode Plot for 10 mM Selenite.
The above materials are also available as the additional file listed at the end of this record.
Repository Citation
Feng, Zhiyuan; Xu, Charles C.; Zhang, Dadi; and Buchheit, Rudolph, "Corrosion Protective Film Formation on Mg Alloys AZ 31 by Exposure to Dilute Selenite Solutions" (2021). Chemical and Materials Engineering Faculty Publications. 76.
https://uknowledge.uky.edu/cme_facpub/76
Supplementary file
Notes/Citation Information
Published in Materials, v. 14, issue 2, 286.
© 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 (https://creativecommons.org/licenses/by/4.0/).