Simultaneously improving the corrosion resistance and strength of magnesium via low levels of Zn and Ge additions

R. L. Liu, Z. R. Zeng, J. R. Scully, G. Williams, N. Birbilis

Research output: Contribution to journalArticleResearchpeer-review

20 Citations (Scopus)

Abstract

Satisfactory corrosion resistance remains an issue in the widespread implementation of magnesium (Mg). The use of alloying to improve mechanical properties of Mg generally accelerates corrosion due to microstructural heterogeneity. However, recent works have revealed that additions of elements serving as ‘cathodic poisons’ such as arsenic (As) and germanium (Ge) can reduce cathodic reaction rates and suppress cathodic activation - imparting corrosion resistance. The effect of Ge was translated into a ternary (and mechanically relevant) Mg-alloy system for the first time, revealing an alloy system with a balance of properties, and low rate of corrosion relative to Mg-alloys to date.

Original languageEnglish
Pages (from-to)18-29
Number of pages12
JournalCorrosion Science
Volume140
DOIs
Publication statusPublished - 1 Aug 2018

Keywords

  • Corrosion
  • Germanium
  • Hydrogen evolution
  • ICP-OES
  • Magnesium
  • Magnesium alloys
  • Zinc

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