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    Equivalent Circuit Modeling of Aluminum/Polymer Laminates Using Electrochemical Impedance Spectroscopy

    Published: 01 January 1993

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    The electrochemical impedance response of crevice geometries in aluminum polymer structures is investigated using transmission line circuitry in an approach similar to porous electrode impedance analysis. An equivalent circuit is proposed for edge-exposed rectangular defects in aluminum components such as laminates, and its impedance response is calculated as a function of defect dimensions, solution resistivity, and exposed planar surface area. Model laminates were constructed with known rectangular defect dimensions and their measured impedance spectra provided experimental verification of the predicted trends.


    adhesive bond, aluminum, impedance, laminates, modeling, transmission line theory

    Author Information:

    Schueller, GRT
    Senior research engineer, 3M Company, Information, Imaging and Electronic Sector Laboratory, 3M Austin Center, Austin, TX

    Taylor, SR
    Research assistant professor, University of Virginia, Charlottesville, VA

    Committee/Subcommittee: G01.11

    DOI: 10.1520/STP18078S