Results of an international round-robin exercise on electrochemical impedance spectroscopy

Stefan Ritter (Corresponding Author), Rik Wouter Bosch (Corresponding Author), François Huet, Kieu Ngo, Robert A. Cottis, Mirdash Bakalli, Michele Curioni, Matthias Herbst, Andreas Heyn, Jan Macak, Radek Novotny, Johan Öijerholm, Timo Saario, José M. Sanchez-Amaya, Hisasi Takenouti, Bojan Zajec, Wenzhong Zhang

    Research output: Contribution to journalArticleScientificpeer-review

    Abstract

    To check the reproducibility of electrochemical impedance spectroscopy (EIS) measurements, 19 laboratories have performed round-robin (RR) testing on EIS using various instruments and three different systems: a dummy cell and two electrochemical systems of practical interest in the nuclear corrosion domain. The general conclusion drawn from the tests performed with the dummy cell is that the actual commercially available instruments for EIS measurements are suitable to produce good quality data. Differences in the EIS diagrams for the tested electrochemical systems were observed and discussed. This RR exercise, involving for the first time a large number of laboratories, shows that intrinsic scatter (large or small) is present in the impedance data and that reproducibility should be readily checked. While EIS is an excellent technique for investigating the kinetics of electrochemical systems, great care has to be taken on planning and conducting the experiments. Recommendations are given to help obtaining reliable EIS results.

    Original languageEnglish
    Pages (from-to)254-268
    Number of pages15
    JournalCorrosion Engineering Science and Technology
    Volume56
    Issue number3
    DOIs
    Publication statusPublished - 2021
    MoE publication typeA1 Journal article-refereed

    Keywords

    • corrosion
    • dummy cell
    • Electrochemical impedance spectroscopy
    • round-robin test

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