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Effect of additive Al2 O3 powders on micro-arc oxide coating of magnesium alloy

In order to understand the effect of additive Al2O3 powders on the film corrosion resistance and the microstructure of the micro-arc oxide (MAO) ceramic film of magnesium alloy, AZ91D die cast magnesium alloy was oxidized with a special micro-arc apparatus. Morphological characteristics and phase co... Full description

Contained in: Science and Engineering of Composite Materials (Online) Vol. 22, No. 5 (2015), p. 497-502
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Links: Additional Link (dx.doi.org)
ISSN: 2191-0359
Additional Keywords: ADDITIV
ALUMINIUM
DRUCKGUSSLEGIERUNG
ELEKTROCHEMISCHE-KORROSION
ELEKTRONENMIKROSKOP
KERAMIKMEMBRAN
KORROSIONSBESTAENDIGKEIT
MAGNESIUMLEGIERUNG
MIKROGEFUEGE
NATRIUMCHLORIDLOESUNG
NICHTMETALLISCH-ANORGANISCHER-UEBERZUG
OXID
OXIDATIONSREAKTION
ROENTGENBEUGUNG
ROENTGENSTRAHL
ULTRASCHALL
DOI: 10.1515/secm-2013-0285
Notes: Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG
Copyright: (C) Alle Rechte beim Herausgeber
Physical Description: 6 Seiten, 10 Quellen
ID (e.g. DOI, URN): 10.1515/secm-2013-0285
PPN (Catalogue-ID): WTI055586538
Note: WTI TEMA DB
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520 |a In order to understand the effect of additive Al2O3 powders on the film corrosion resistance and the microstructure of the micro-arc oxide (MAO) ceramic film of magnesium alloy, AZ91D die cast magnesium alloy was oxidized with a special micro-arc apparatus. Morphological characteristics and phase constituent of ceramic coatings were analyzed by scanning electron microscope (SEM) and X-ray diffraction (XRD). And the aluminum (Al) element of before and after the Al2O3 accession were analyzed by energy-dispersive X-ray (EDX). The results showed that after adding Al2O3 powders, pores on ceramic coatings decreased, the loose layer became more compact, the new phase of Al2O3 appeared, and the Al element of the ceramic membrane increased. Ultrasonic waves promoted the content of Al2O3 in the layer. Electrochemical corrosion experiments in 3.5% NaCl solution showed that the corrosion resistance of ceramic coatings after adding Al2O3 powders was improved greatly. [Walter de Gruyter GmbH. Reproduced with permission.] 
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