Observations of the galvanostatic dissolution of pure magnesium

N. T. Kirkland, G. Williams, N. Birbilis

Research output: Contribution to journalLetterResearchpeer-review

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Abstract

The dissolution of pure magnesium in 0.1M NaCl under galvanostatic polarisation is reconciled in real time via video imaging of specially designed working electrodes that permit geometrically uniform dissolution. The dissolution stoichiometry was observed to be centred about n=2, however this varies according to the magnitude of the applied current. Applied currents densities <1mA/cm2 display ≈ 1.75-2, whilst densities >1mA/cm2 display n >= 2, the latter related to a significant increase in electrolyte pH during testing.

Original languageEnglish
Pages (from-to)5-9
Number of pages5
JournalCorrosion Science
Volume65
DOIs
Publication statusPublished - Dec 2012

Keywords

  • Magnesium
  • Galvanostatic
  • Anodic dissolution

Cite this

Kirkland, N. T. ; Williams, G. ; Birbilis, N. / Observations of the galvanostatic dissolution of pure magnesium. In: Corrosion Science. 2012 ; Vol. 65. pp. 5-9.
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Observations of the galvanostatic dissolution of pure magnesium. / Kirkland, N. T.; Williams, G.; Birbilis, N.

In: Corrosion Science, Vol. 65, 12.2012, p. 5-9.

Research output: Contribution to journalLetterResearchpeer-review

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AB - The dissolution of pure magnesium in 0.1M NaCl under galvanostatic polarisation is reconciled in real time via video imaging of specially designed working electrodes that permit geometrically uniform dissolution. The dissolution stoichiometry was observed to be centred about n=2, however this varies according to the magnitude of the applied current. Applied currents densities <1mA/cm2 display n ≈ 1.75-2, whilst densities >1mA/cm2 display n >= 2, the latter related to a significant increase in electrolyte pH during testing.

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