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Article Dans Une Revue Corrosion Science Année : 2002

Corrosion behaviour of high pressure die-cast and semi-solid cast AZ91D alloys

S Mathieu
C Rapin
P Steinmetz
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Résumé

The microstructure and the corrosion behaviour of high pressure die-cast and semi-solid cast AZ91D magnesium alloys have been investigated. Semi-solid processing leads to a structure with large rounded grains of a solid solution of magnesium (α phase) whereas die-cast alloys are more homogeneous. Electrochemical measurements, particularly with impedance spectroscopy, have shown that the semi-solid cast alloy possesses a corrosion rate at least 35% below that of the die-cast alloy. This can be explained with considering the differences between the composition of the primary α phase and the volume fraction of the β phase, in the two types of alloy.

Domaines

Chimie

Dates et versions

hal-04057802 , version 1 (04-04-2023)

Identifiants

Citer

S Mathieu, C Rapin, J Hazan, P Steinmetz. Corrosion behaviour of high pressure die-cast and semi-solid cast AZ91D alloys. Corrosion Science, 2002, 44 (12), pp.2737-2756. ⟨10.1016/S0010-938X(02)00075-6⟩. ⟨hal-04057802⟩
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