Abstract
The ionic current density in the near-field of a corroding iron-copper galvanic couple was measured, and the results were compared with the predictions of a finite- element model, which calculates near-field potential and current density distributions. All three components of the ionic current density vector were measured using a three-dimensional vibrating microprobe. The calculated current densities were based on the measured polarization curves of the individual constituent materials forming the couple. Agreement between the predicted and measured results was excellent. Agreement between one-dimensional ionic current density distributions from previous work was also excellent.
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