Corrosion behaviour of a nominally high purity Mg ingot produced by permanent mould direct chill casting

Research output: Journal contributionsJournal articlesResearchpeer-review

Authors

  • Zhixia Qiao
  • Zhiming Shi
  • Norbert Hort
  • Nor Ishida Zainal Abidin
  • Andrej Atrens

The corrosion behaviour was characterized using hydrogen evolution, weight loss, electrochemical impedance spectroscopy (EIS) and cathodic polarization curves, in 3.5% NaCl saturated with Mg(OH) 2, with tests lasting up to 14days, and compared with the corrosion behaviour of the HP Mg used in our prior research at UQ. The corrosion behaviour was consistent with the uni-positive Mg + ion Mg corrosion mechanism, particularly the fact that the corrosion rate measured using electrochemical techniques was consistently lower than that measured independently by weight loss or hydrogen evolution, as predicted by the uni-positive Mg + ion Mg corrosion mechanism.

Original languageEnglish
JournalCorrosion Science
Volume61
Pages (from-to)185-207
Number of pages23
ISSN0010-938X
DOIs
Publication statusPublished - 08.2012
Externally publishedYes

    Research areas

  • A. Magnesium, B. EIS, B. Polarization, B. Weight loss, C. Negative difference effect
  • Engineering

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