Real-time in situ observation of the corrosion process of die-cast AZ91D magnesium alloy in NaCl solutions under galvanostatic polarization

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Abstract

In situ observations of the filiform corrosion process of die-cast AZ91D magnesium alloy were carried out in 0.1 and 0.01 M NaCl solutions (pH 8.0) through a microscale polarization technique. The changes in morphology were observed in real-time using an optical microscope. Filiform corrosion proceeded in lamellar α + β structures adjacent to β phases and sometimes in the α phase grains. The β phases remained intact after filiform corrosion.

Original languageEnglish
Article number109834
JournalCorrosion Science
Volume192
DOIs
Publication statusPublished - 2021 Nov

Keywords

  • Filiform corrosion
  • Galvanostatic polarization
  • Magnesium alloy
  • Microscale polarization technique

ASJC Scopus subject areas

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

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