Formation of a compact oxide layer on AZ91D magnesium alloy by microarc oxidation via addition of cerium chloride into the MAO electrolyte / M. Laleh in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 6 (11/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 765-771 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 [article]

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Study of bipolar pulsed nanocrystalline plasma electrolytic carbonitriding on nanostructure of compound layer for CP-Ti / M. Aliofkhazraei in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 5, N° 4 (12/2008)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 5, N° 4 (12/2008) . - p. 497-503 Titre : Study of bipolar pulsed nanocrystalline plasma electrolytic carbonitriding on nanostructure of compound layer for CP-Ti Type de document : texte imprimé Auteurs : M. Aliofkhazraei, Auteur ; M. Sabouri, Auteur ; H. R. Jafarian, Auteur ; A. Denshmaslak, Auteur ; Alireza Sabour Rouhaghdam, Auteur Année de publication : 2008 Article en page(s) : p. 497-503 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Dépôt électrolytique Matériaux nanocristallins Nanostructures Nitruration Plan d'expérience Plasmas (gaz ionisés) Revêtements:Peinture Taguchi, Méthodes de (Contrôle de qualité) Titane Index. décimale : 667.9 Revêtements et enduits Résumé : Surface hardening of commercially pure titanium using bipolar pulsed nanocrystalline plasma electrolytic carbonitriding has been studied in this investigation. The coating process has been performed on triethanolamine-based electrolytes using a cooling bath. The nanostructure of obtained compound layers was examined with figure analysis of SEM nanographs. The effects of process variables (i.e., frequency, temperature of electrolytes, applied voltage, and treatment time) have been studied experimentally. Statistical methods were used to achieve the optimum size of nanocrystals. Finally, the contribution percentage of the effective factors of pulsed current was revealed, and confirmation showed the validity of obtained results. It has also been revealed that by changing the size of nanocrystalline carbonitrides, other properties of the coating will change significantly. DOI : 10.1007/s11998-008-9086-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-008-9086-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3477 [article]

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