Slow positron beam study of corrosion behavior of AM60B magnesium alloy in NaCl solution

W. Yang, Z. J. Zhu, J. J. Wang, Y. C. Wu, T. Zhai, G. L. Song

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The corrosion behavior of super vacuum die-cast AM60B magnesium alloys immersed in a 5 wt% NaCl solution was investigated by slow positron beam technique, XRD, XPS, SEM and potentiodynamic polarization tests. The XRD and XPS results indicated that Mg(OH)2 was main corrosion product in the salt solution. With prolonging the immersion time, a significant decrease of Doppler-broadened annihilation line-width parameter near the surface after corrosion was observed and interpreted that the pre-existing interfacial voids between oxide film and matrix might promote the formation of Mg(OH)2 corrosion layer. Polarization tests found that Mg(OH)2 could provide a temporary protection.

Original languageEnglish
Pages (from-to)271-280
Number of pages10
JournalCorrosion Science
Volume106
DOIs
StatePublished - May 1 2016

Keywords

  • A. Magnesium
  • B. SEM
  • B. XRD

ASJC Scopus subject areas

  • Chemistry (all)
  • Chemical Engineering (all)
  • Materials Science (all)

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