Measuring corrosion rate of type 304 stainless steel in subcritical and supercritical aqueous solutions via electrochemical noise analysis

Xiangyang Zhou, S. N. Lvov, X. J. Wei, L. G. Benning, D. D. Macdonald

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

Electrochemical noise (EN) sensors have been developed to measure the corrosion rate of Type 304 steel (SS) in subcritical and supercritical environments. The potential and coupling current noise were recorded simultaneously and the noise resistance (R n ) was calculated from the standard deviations in the potential and current records. We found that the inverse noise resistance correlated very well with the corrosion rate evaluated from separate mass loss experiments, and that both the inverse noise resistance and the average corrosion rate were functions of temperature and flow rate. In the temperature range from 200 to 390°C, the corrosion rate was found to be proportional to the inverse noise resistance and hence the Stern-Geary relationship can be used to evaluate the corrosion rate.

Original languageEnglish (US)
JournalNACE - International Corrosion Conference Series
Volume2001-March
StatePublished - Jan 1 2001
Externally publishedYes
EventCorrosion 2001 - Houston, United States
Duration: Mar 11 2001Mar 16 2001

Fingerprint

Stainless Steel
Corrosion rate
Stainless steel
Steel
Flow rate
Temperature
Sensors
Experiments

Keywords

  • Electrochemical noise analysis
  • Noise resistance
  • Supercritical solution

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

Cite this

Measuring corrosion rate of type 304 stainless steel in subcritical and supercritical aqueous solutions via electrochemical noise analysis. / Zhou, Xiangyang; Lvov, S. N.; Wei, X. J.; Benning, L. G.; Macdonald, D. D.

In: NACE - International Corrosion Conference Series, Vol. 2001-March, 01.01.2001.

Research output: Contribution to journalConference article

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AU - Zhou, Xiangyang

AU - Lvov, S. N.

AU - Wei, X. J.

AU - Benning, L. G.

AU - Macdonald, D. D.

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N2 - Electrochemical noise (EN) sensors have been developed to measure the corrosion rate of Type 304 steel (SS) in subcritical and supercritical environments. The potential and coupling current noise were recorded simultaneously and the noise resistance (R n ) was calculated from the standard deviations in the potential and current records. We found that the inverse noise resistance correlated very well with the corrosion rate evaluated from separate mass loss experiments, and that both the inverse noise resistance and the average corrosion rate were functions of temperature and flow rate. In the temperature range from 200 to 390°C, the corrosion rate was found to be proportional to the inverse noise resistance and hence the Stern-Geary relationship can be used to evaluate the corrosion rate.

AB - Electrochemical noise (EN) sensors have been developed to measure the corrosion rate of Type 304 steel (SS) in subcritical and supercritical environments. The potential and coupling current noise were recorded simultaneously and the noise resistance (R n ) was calculated from the standard deviations in the potential and current records. We found that the inverse noise resistance correlated very well with the corrosion rate evaluated from separate mass loss experiments, and that both the inverse noise resistance and the average corrosion rate were functions of temperature and flow rate. In the temperature range from 200 to 390°C, the corrosion rate was found to be proportional to the inverse noise resistance and hence the Stern-Geary relationship can be used to evaluate the corrosion rate.

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