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

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

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

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.
LanguageEnglish
Pages1373-1379
Number of pages6
JournalJournal of Applied Electrochemistry
Volume31
Issue number12
DOIs
Publication statusPublished - 2001

Fingerprint

Iron
Spectroscopy
Corrosion
Steel
Autoclaves
Corrosion rate
Temperature
Pipe
Electrodes

Keywords

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

Cite this

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abstract = "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.",
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AC impedence spectroscopy as a technique for investigating corrosion of iron in hot flowing Bayer liquors. / Lu, Q.; Stack, M.M.; Wiseman, C.R.

In: Journal of Applied Electrochemistry, Vol. 31, No. 12, 2001, p. 1373-1379.

Research output: Contribution to journalArticle

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AU - Stack, M.M.

AU - Wiseman, C.R.

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AB - 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.

KW - Bayer liquors

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KW - impedance spectroscopy

KW - ions

KW - materials science

KW - oxidation

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