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The link between microstructure and corrosion of Mg alloy ZE41

Version 2 2024-06-03, 15:47
Version 1 2017-08-01, 15:12
conference contribution
posted on 2024-06-03, 15:47 authored by WC Neil, Bruce HintonBruce Hinton, Maria ForsythMaria Forsyth
Mg alloy ZE41, used extensively in the aerospace industry, possesses excellent mechanical properties albeit poor corrosion resistance. This paper investigates the mechanism of corrosion, and the interaction between the grain boundary intermetallic phases, the Zr-rich regions within the grains and the bulk Mg rich matrix in both the as-cast and heat-treated conditions. The results of optical and scanning electron microscopy (SEM) together with potentiodynamic polarisation have shown the importance of the microstructure in the initiation and propagation of corrosion in an aqueous environment. The Zr-rich regions play a distinct role in the early stages of corrosion in this alloy. It is also shown by altering the Zr distribution by means of heat treatment, that the corrosion morphology and mechanism is changed significantly.

History

Pagination

826-831

Location

Coffs Harbour, Qld.

Start date

2009-11-15

End date

2009-11-19

ISBN-13

9781622762453

Publication classification

EN.1 Other conference paper

Title of proceedings

49th Annual Conference of the Australasian Corrosion Association 2009: Corrosion and Prevention 2009

Event

Annual Conference of the Australasian Corrosion Association 2009

Publisher

Australasian Corrosion Association ( ACA )

Place of publication

[Melbourne, Vic.]

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