Journal of Applied Electrochemistry

, Volume 39, Issue 5, pp 637–645 | Cite as

Analysis of the dynamics of Intergranular corrosion process of sensitised 304 stainless steel using recurrence plots

  • E. García-Ochoa
  • J. González-Sánchez
  • N. Acuña
  • J. Euan
Original Paper
First Online:
Received:
Accepted:

Abstract

This study presents the assessment of the dynamics of intergranular corrosion of austenitic stainless steel with different degrees of sensitization through the analysis of electrochemical current noise signals. Samples of S30400 stainless steel were aged at 923 K for 50, 250 and 1,000 min before being quenched in water. The double Loop Electrochemical Potentiokinetic Reactivation test was applied to assess the degree of sensitization. The electrochemical noise data were analysed using a novel mathematical tool named Recurrence Plots (RP). This method allowed us to assess the dynamics of the intergranular corrosion process of the steel in a H2SO4 + KSCN solution at room temperature. The study was conducted using a recurrence quantification analysis (RQA) from which it was possible to determine the percent of recurrence (%R), the percent of determinism (%D) and the information Entropy of the corrosion process. It was found that these parameters increased with the sensitisation intensity, which indicates that sensitisation induced a more deterministic dynamics on the electrochemical process.

Keywords

Sensitisation Stainless steel Recurrence plots Electrochemical noise 
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Notes

Acknowledgements

The authors thank Dr. David Greenfield (MERI, Sheffield Hallam University) for the revision and comments made to the manuscript and Dr. Tezozomoc Pérez for the facilities given at the Centro de Investigación en Corrosión.

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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • E. García-Ochoa
    • 1
  • J. González-Sánchez
    • 1
  • N. Acuña
    • 1
  • J. Euan
    • 1
  1. 1.Centro de Investigación en CorrosiónUniversidad Autónoma de CampecheCampecheMexico

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