The relation between processing, microstructure and corrosion behavior of new magnesium alloys for transportation application

G. Ben Hamu, D. Eliezer, K. S. Shin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

New magnesium alloys (Die-Cast and wrought) have increasingly been developed in recent years for the automotive industry due to their high potential as structural materials for low density and high strength/weight ratio demands. However, their poor mechanical properties and low corrosion resistance have led to a search for new kinds of magnesium alloys with better strength, ductility, high temperature behaviour and high corrosion resistance. The main objective of this research is to investigate the corrosion behaviour of new magnesium alloys: Mg-Al-Ca, Mg-Al-Sr, Mg-Zn-Mn-Si (ZSM) and Mg-Zn-Mn-Si-Ca (ZSMX). These ZSM6X1 and ZSM651+YCa alloys were prepared using hot extrusion. These Mg-Al-Ca and Mg-Al-Sr were prepared using high pressure die cast. AC and DC polarization tests were carried out on the new alloys. Microstructure was examined using optical and electron microscopy (SEM) and EDS. The addition of Si increased the corrosion resistance. The additions of Sr and Ca also affected the corrosion behaviour. These results can be explained by the effects of alloying elements on the microstructure of Mg alloys such as grain size and precipitates caused by the change in precipitation and recrystallisation behaviour.

Original languageEnglish
Title of host publication47th Annual Conference of the Australasian Corrosion Association 2007
Subtitle of host publicationCorrosion Control 2007
Pages906-916
Number of pages11
StatePublished - 1 Dec 2007
Event47th Annual Conference of the Australasian Corrosion Association 2007: Corrosion Control 2007 - Sydney, NSW, Australia
Duration: 4 Dec 20075 Dec 2007

Publication series

Name47th Annual Conference of the Australasian Corrosion Association 2007: Corrosion Control 2007

Conference

Conference47th Annual Conference of the Australasian Corrosion Association 2007: Corrosion Control 2007
Country/TerritoryAustralia
CitySydney, NSW
Period4/12/075/12/07

Keywords

  • Alloying element
  • Die Cast
  • Electrochemical techniques
  • Hot extrusion
  • Magnesium alloy

ASJC Scopus subject areas

  • Surfaces and Interfaces

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