The Nondestructive Evaluation of Adhesively Bonded Aluminum Using Electrochemical Impedance Spectroscopy: I . Theory and Experimental Investigation of Extrinsic Variables

Abstract

The electrochemical impedance response of crevice geometries in aluminum/polymer structures is modeled using transmission line circuitry in an approach similar to porous electrode impedance analysis. The equivalent circuit model proposed for edge-exposcd rectangular defects in aluminum/polymer bonds allows the impedance response of a defect to be calculated as a function of defect dimensions, solution resistivity, and exposed planar surface area. Experimcnta] verification of the model is providcd by analysis of the electrochemical impedance spectra of aluminum laminates constructed with known defect dimensions. ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 169.230.243.252 Downloaded on 2015-03-30 to IP