The influence of yttrium (Y) on the corrosion of Mg-Y binary alloys

Liu, Ming, Schmutz, Patrik, Uggowitzer, Peter J., Song, Guangling and Atrens, Andrej (2010) The influence of yttrium (Y) on the corrosion of Mg-Y binary alloys. Corrosion Science, 52 11: 3687-3701. doi:10.1016/j.corsci.2010.07.019


Author Liu, Ming
Schmutz, Patrik
Uggowitzer, Peter J.
Song, Guangling
Atrens, Andrej
Title The influence of yttrium (Y) on the corrosion of Mg-Y binary alloys
Journal name Corrosion Science   Check publisher's open access policy
ISSN 0010-938X
Publication date 2010-11-01
Year available 2010
Sub-type Article (original research)
DOI 10.1016/j.corsci.2010.07.019
Open Access Status Not yet assessed
Volume 52
Issue 11
Start page 3687
End page 3701
Total pages 15
Editor Burstein, G.T.
Place of publication Oxford, United Kingdom
Publisher Pergamon - Elsevier
Language eng
Subject 8612 Fabricated Metal Products
0912 Materials Engineering
E1
Abstract Corrosion of Mg-Y alloys was studied using electrochemical evaluations, immersion tests and direct observations. There were two important effects. in 0.1 M NaCl, the corrosion rate increased with increasing Y content due to increasing amounts of the Y-containing intermetallic. In 0.1 M Na(2)SO(4), the corrosion rate decreased with increasing Y content above 3%, attributed to a more protective surface film, despite the intermetallic. The corrosion rate evaluated by electrochemical impedance spectroscopy was somewhat smaller than that evaluated from H evolution as expected from the Mg corrosion mechanism. A mechanism is proposed for filiform corrosion. Direct in situ corrosion observations revealed that a predominant feature was hydrogen evolution from particular parts of the alloy surface. (C) 2010 Elsevier Ltd. All rights reserved.
Formatted abstract
Corrosion of Mg-Y alloys was studied using electrochemical evaluations, immersion tests and direct observations. There were two important effects. in 0.1 M NaCl, the corrosion rate increased with increasing Y content due to increasing amounts of the Y-containing intermetallic. In 0.1 M Na2SO4, the corrosion rate decreased with increasing Y content above 3%, attributed to a more protective surface film, despite the intermetallic. The corrosion rate evaluated by electrochemical impedance spectroscopy was somewhat smaller than that evaluated from H evolution as expected from the Mg corrosion mechanism. A mechanism is proposed for filiform corrosion. Direct in situ corrosion observations revealed that a predominant feature was hydrogen evolution from particular parts of the alloy surface.
© 2010 Elsevier Ltd.
Keyword Magnesium Alloys
Mechanical-Properties
Anodic-Dissolution
Sodium-Chloride
Pure Magnesium
Zn Alloys
Behavior
Performance
Microstructure
Resistance
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2011 Collection
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Created: Wed, 17 Nov 2010, 22:43:26 EST by Sally Beard on behalf of School of Mechanical and Mining Engineering