Numerical modelling of galvanic corrosion of magnesium (Mg) alloys

Atrens, A., Shi, A. and Song, G. -L. (2011). Numerical modelling of galvanic corrosion of magnesium (Mg) alloys. In Guang-Ling Song (Ed.), Corrosion of magnesium alloys (pp. 455-483) Cambridge, United Kingdom: Woodhead Publishing.

Author Atrens, A.
Shi, A.
Song, G. -L.
Title of chapter Numerical modelling of galvanic corrosion of magnesium (Mg) alloys
Title of book Corrosion of magnesium alloys
Place of Publication Cambridge, United Kingdom
Publisher Woodhead Publishing
Publication Year 2011
Sub-type Critical review of research, literature review, critical commentary
Open Access Status
Year available 2011
Series Woodhead Publishing in Materials
ISBN 9781845697082
Editor Guang-Ling Song
Chapter number 12
Start page 455
End page 483
Total pages 29
Total chapters 17
Language eng
Abstract/Summary This chapter reviews numerical modelling of magnesium (Mg) galvanic corrosion, in particular, the prediction of the galvanic current density distribution of a typical Mg alloy such as AZ91 in contact with steel in a typical corrosive solution such as 5% NaCl. The galvanic current density distribution predicted by boundary elemental modelling was in good agreement with experimental measurements. The galvanic current density distribution caused by the interaction of two independent galvanic couples was equal to the sum of the galvanic current density caused by each individual galvanic couple. However, experimental measurements indicate that the measured corrosion rate was significantly higher than the galvanic corrosion rate, and this was interpreted as self-corrosion of Mg, corresponding to a penetration rate of -230 mm/yr. However, does the necessity to postulate self-corrosion indicate some fundamental flaw in the methodology? Issues and future research directions are discussed.
Keyword Magnesium alloys
Galvanic corrosion
Boundary element method
Q-Index Code B1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Book Chapter
Collection: School of Mechanical & Mining Engineering Publications
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Created: Tue, 26 Mar 2013, 09:19:13 EST by Dr Zhiming Shi on behalf of School of Mechanical and Mining Engineering