Influence of heat treatment and microstructure on the corrosion of magnesium alloy Mg-10Gd-3Y-0.4Zr

Peng, L.M., Chang, J.W., Guo, X.W., Atrens, A., Ding, W.J. and Peng, Y.H. (2009) Influence of heat treatment and microstructure on the corrosion of magnesium alloy Mg-10Gd-3Y-0.4Zr. JOURNAL OF APPLIED ELECTROCHEMISTRY, 39 6: 913-920. doi:10.1007/s10800-008-9739-4


Author Peng, L.M.
Chang, J.W.
Guo, X.W.
Atrens, A.
Ding, W.J.
Peng, Y.H.
Title Influence of heat treatment and microstructure on the corrosion of magnesium alloy Mg-10Gd-3Y-0.4Zr
Journal name JOURNAL OF APPLIED ELECTROCHEMISTRY   Check publisher's open access policy
ISSN 0021-891X
Publication date 2009-06-01
Year available 2008
Sub-type Article (original research)
DOI 10.1007/s10800-008-9739-4
Open Access Status Not yet assessed
Volume 39
Issue 6
Start page 913
End page 920
Total pages 8
Editor Botte, G.G.
Place of publication The Netherlands
Publisher Springer - Netherlands
Language eng
Subject C1
8612 Fabricated Metal Products
0912 Materials Engineering
Abstract The corrosion of Mg alloy Mg-10Gd-3Y-0.4Zr, in the as-cast (F), solution treated (T4) and aged (T6) conditions, was investigated in 5% NaCl solution by immersion tests and potentiodynamic polarization measurements. The as-cast (F) condition had the highest corrosion rate due to micro-galvanic corrosion of the alpha-Mg matrix by the eutectic. Solution treatment led to the lowest corrosion rate, attributed to the absence of any second phase and a relatively compact protective surface film. Ageing at 250 A degrees C increased the corrosion rate with increasing ageing time to 193 h attributed to increasing micro-galvanic corrosion acceleration of the Mg matrix by increasing amounts of the precipitates. Ageing for longer periods caused a decrease in the corrosion rate attributed to some barrier effect by a nearly continuous second-phase network. Electrochemical measurements did not give accurate evaluation of the corrosion rate in agreement with the immersion tests.
Keyword Corrosion
ELECTROCHEMICAL-BEHAVIOR
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 20080430657
08XD14020
2007CB613701
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mechanical & Mining Engineering Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 33 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 36 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Thu, 03 Sep 2009, 18:09:37 EST by Mr Andrew Martlew on behalf of School of Mechanical and Mining Engineering