Corrosion mechanisms of new wrought mg-al based alloys alloying with mn, zn and sn

Guy Ben Hamu, Polina Metalnikov, Dan Eliezer, Kwang Seon Shin

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

Abstract

The low density and high strength/weight ratio of magnesium (Mg) and magnesium alloys make them promising candidate materials in light-weight vehicle industries, such as automobile and aerospace, where poor corrosion resistance is a major obstacle in many of their wide-spread applications. Addition of alloying elements with production of wrought Mg alloys with finer microstructure results in enhanced mechanical properties and corrosion resistance. The aim of this research is to study the changes in microstructure caused by addition of alloying elements (zinc (Zn), and tin (Sn)) to new wrought Mg-5Al alloy, and their influence on the alloy's corrosion behavior. The microstructure was investigated using optical and electron microscopy and EDS. The corrosion behavior was analyzed through electrochemical measurements and immersion test. It was found that the corrosion resistance of Mg-5Al alloy was improved by addition of alloying elements, and the amounts of these elements strongly influenced the corrosion behavior of the alloys. Nevertheless, the influence of alloying elements is different for short-term and long-term immersion periods, since the mechanisms of corrosion initiation and corrosion propagation are different.

Original languageEnglish
Title of host publicationTHERMEC 2018
EditorsR. Shabadi, Mihail Ionescu, M. Jeandin, C. Richard, Tara Chandra
PublisherTrans Tech Publications Ltd
Pages1880-1885
Number of pages6
ISBN (Print)9783035712087
DOIs
StatePublished - 1 Jan 2018
Externally publishedYes
Event10th International Conference on Processing and Manufacturing of Advanced Materials, 2018 - Paris, France
Duration: 9 Jul 201813 Jul 2018

Publication series

NameMaterials Science Forum
Volume941 MSF
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference10th International Conference on Processing and Manufacturing of Advanced Materials, 2018
Country/TerritoryFrance
CityParis
Period9/07/1813/07/18

Keywords

  • Corrosion
  • Electrochemistry
  • Magnesium alloys
  • Microstructure
  • Scanning Electron Microscopy (SEM)

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