AC impedence spectroscopy as a technique for investigating corrosion of iron in hot flowing Bayer liquors

Q. Lu, M.M. Stack, C.R. Wiseman

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11 Citations (Scopus)


The flow-induced corrosion of iron, in spent Bayer liquor at high temperatures, was investigated using a rotating cylinder electrode (RCE) in an autoclave facility. A temperature range of 100-230 °C and equivalent pipe velocities in the range 0.84-3 m s-1 were used. AC impedance technique was applied to monitor in situ the entire corrosion process. Corrosion rates measured by a.c. impedance expressed as average 1/R p were in good agreement with those obtained by weight loss measurements. The results suggest that a.c. impedance is a suitable method to monitor the corrosion process of steels exposed to flowing Bayer liquor at higher temperatures.
Original languageEnglish
Pages (from-to)1373-1379
Number of pages6
JournalJournal of Applied Electrochemistry
Issue number12
Publication statusPublished - 2001


  • Bayer liquors
  • corrosion
  • impedance spectroscopy
  • ions
  • materials science
  • oxidation

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