Corrosion behaviour of Mg/Al alloys in high humidity atmospheres

Corrosion behaviour of Mg/Al alloys in high humidity atmospheres

The influence of relative humidity (80–90–98% RH) and temperature (25 and 50 °C) on the corrosion behaviour of AZ31, AZ80 and AZ91D magnesium alloys was evaluated using gravimetric measurements. The results were compared with the data obtained for the same alloys immersed in Madrid tap water. The co...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Materials and corrosion 2011-04, Vol.62 (4), p.326-334
Hauptverfasser: Arrabal, R., Pardo, A., Merino, M. C., Merino, S., Mohedano, M., Casajús, P.
Format: Artikel
Sprache:eng
Schlagworte:
aluminium
Applied sciences
atmospheric corrosion
Corrosion
Corrosion environments
Exact sciences and technology
magnesium alloys
Metals. Metallurgy
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The influence of relative humidity (80–90–98% RH) and temperature (25 and 50 °C) on the corrosion behaviour of AZ31, AZ80 and AZ91D magnesium alloys was evaluated using gravimetric measurements. The results were compared with the data obtained for the same alloys immersed in Madrid tap water. The corrosion rates of AZ alloys increased with the RH and temperature and were influenced by the aluminium content and alloy microstructure for RH values above 90%. The initiation of corrosion was localised around the Al–Mn inclusions in the AZ31 alloy and at the centre of the α‐Mg phase in the AZ80 and AZ91D alloys. The β‐Mg17Al12 phase acted as a barrier against corrosion.
ISSN:0947-5117
1521-4176
DOI:10.1002/maco.200905538