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  4. Development of a generalised understanding of environmentally-assisted degradation of magnesium-aluminium alloys
 
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2014
Conference Paper
Titel

Development of a generalised understanding of environmentally-assisted degradation of magnesium-aluminium alloys

Abstract
Common factors affecting the susceptibility of Mg-Al alloys to creep, corrosion and stress corrosion cracking are the influences of the concentration and morphology of the beta phase. The influences of the beta phase on the various degradation modes are interrelated and may have opposing consequences on durability. This paper provides an overview of the influences of the beta phase on the mechanisms for degradation of Mg-Al alloys in extreme environments. Preliminary results aimed at evaluating the role of the beta phase in the corrosion behaviour of high-purity Mg-Al alloys in 3.5% NaCl solution using electrochemical noise analysis are given. The results show a general increase in corrosion resistance with increasing total Al concentration. This is rationalised in terms of the effect of Al-enrichment of the surface film. The implications of the results on alloy development are discussed.
Author(s)
Winzer, N.
Höpfel, H.
Casajus, P.
Manuel, M.V.
Hort, N.
Neelameggham, N.R.
Hauptwerk
Magnesium Technology 2014
Konferenz
Magnesium Technology Symposium 2014
The Minerals, Metals and Materials Society (TMS Annual Meeting and Exhibition) 2014
Thumbnail Image
DOI
10.1002/9781118888179
Language
English
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Fraunhofer-Institut für Werkstoffmechanik IWM
Tags
  • magnesium

  • corrosion

  • electrochemical noise...

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