| Titre : |
Formation of a compact oxide layer on AZ91D magnesium alloy by microarc oxidation via addition of cerium chloride into the MAO electrolyte |
| Type de document : |
texte imprimé |
| Auteurs : |
M. Laleh, Auteur ; Farzad Kargar, Auteur ; Alireza Sabour Rouhaghdam, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 765-771 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Revêtement métallique
|
| Tags : |
'Alliage magnésium AZ91D' 'Oxydation microarc' Revêtement CeCl3 Corrosion |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Magnesium and its alloys have been used in many industries, but they are reactive and require protection against aggressive environments. In this study, a compact and relatively pore-free oxide coating was formed on AZ91D magnesium alloy to improve its corrosion resistance by means of the microarc oxidation (MAO) process via the addition of CeCl3 as an additive into the MAO electrolyte. Morphologies and compositions of the coatings were studied with scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), respectively. It was found that with the addition of CeCl3 into the MAO electrolyte, the obtained coating showed more uniform morphology compared with the coating produced in the CeCl3 free electrolyte. EDS analysis confirmed the presence of cerium in the coating formed in the electrolyte with CeCl3. Polarization tests results showed that the corrosion current density of the coating formed in the CeCl3 containing electrolyte was less than that of the coating formed in the electrolyte without CeCl3. Furthermore, electrochemical impedance spectroscopy (EIS) tests indicated that the coating formed in the electrolyte with the addition of CeCl3 improved the corrosion resistance of the substrate significantly. |
| Note de contenu : |
- Microarc oxidation process
- Morphologies and compositions of the MAO coatings
- Corrosion studies
- Porosity measurements of the coatings |
| DOI : |
10.1007/s11998-011-9357-7 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9357-7.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12603 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 765-771
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