Title
Corrosion behaviour of AZ91D and AM50 magnesium alloys with Nd and Gd additions in humid environments
Date Issued
01 February 2012
Access level
metadata only access
Resource Type
journal article
Author(s)
Publisher(s)
Elsevier
Abstract
AM50 and AZ91D alloys modified with rare earths (RE) were evaluated under atmospheric conditions. Nd and Gd additions resulted in formation of Al 2RE and Al-Mn-RE compounds and reduction of the fraction of β-phase. According to surface potential maps, RE-containing intermetallics were more noble than the β-phase, but less than Al-Mn inclusions. As a result, the action of micro-galvanic couples depended on the added amount of RE and the initial alloy microstructure. Nd or Gd additions improved the corrosion resistance of the AM50 alloy by up to 43%, but had no significant effect on the corrosion resistance of the AZ91D alloy. © 2011 Elsevier Ltd.
Start page
351
End page
362
Volume
55
Language
English
OCDE Knowledge area
Ingeniería de materiales
Subjects
Scopus EID
2-s2.0-83555164594
Source
Corrosion Science
ISSN of the container
0010938X
Sponsor(s)
The authors are grateful to the MCYT (Spain, Project MAT 2009-09845-C02-01 ) and the MANOEQ of Departamento de Metalurgia Física of CENIM (CSIC) for supply of the test materials. R. Arrabal and E. Matykina are grateful to the MICINN (Spain) for financial support via the Ramon y Cajal Programme ( RYC-2008-02038 , RYC-2010-06749 ). K. Paucar is grateful to the Fundación Carolina for funding a grant.
Sources of information:
Directorio de Producción Científica
Scopus