Corrosion of the alloys Magnox AL80, Magnox ZR55 and pure magnesium in air containing water vapour

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Abstract

Understanding the corrosion susceptibility of Magnox alloys during short- and long-term storage in moist air is important. Corrosion of Magnox AL80, Magnox ZR55 and magnesium has been studied in air containing water partial pressures between 200 vppm and ∼80000 vppm, at temperatures of 46 °C–96 °C. Specimens were exposed to air, with and without CO2, and argon gas. Metal consumption rates were measured and corrosion products characterised, using optical and scanning electron microscopy, energy dispersive x-ray microanalysis, x-ray diffraction and secondary ion mass spectrometry. Results show the importance of CO2 gas for suppressing breakaway corrosion in moist air.
Original languageEnglish
Pages (from-to)347-363
Number of pages16
JournalCorrosion Science
Volume112
Early online date2 Aug 2016
DOIs
Publication statusPublished - Nov 2016

Keywords

  • Magnesium
  • Alloy
  • Magnox
  • Atmospheric corrosion
  • Interfaces
  • Kinetic parameters

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