Monitoring of oxidation of metals in gas environments for energy production

Liisa Heikinheimo (Corresponding Author), Kari Lahdenperä, Stefan Sandlin

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    Abstract

    Monitoring of oxidation in gas environments typical of energy production is essential for determination of lifetime and condition of various components operating at high temperatures. One of the most important phenomena to be monitored is the oxide growth kinetics and its changes during the exposure. Three different monitoring methods have been presented in this paper. First, a conventional method called thermogravimetry based on the weight change measurement during oxidation is reviewed. Second, a novel monitoring technique, HT-CER technique, where contact electric resistance is measured as a function of time and distance of the measuring tip is presented. The third approach described involves a method under development, based on the change of capacitance over two growing oxide surfaces. Simple oxidation in air at a typical temperature for superheater tubes in boilers, 600 °C, has been selected as the reference condition for all of the monitoring methods.
    Original languageEnglish
    Pages (from-to)2143-2161
    Number of pages19
    JournalCorrosion Science
    Volume45
    Issue number10
    DOIs
    Publication statusPublished - 2003
    MoE publication typeA1 Journal article-refereed

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    Keywords

    • on line monitoring
    • high temperature oxidation
    • oxidation kinetics
    • high temperature steels

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