Publication | Closed Access
Ionic Current Densities in the Nearfield of a Corroding Iron‐Copper Galvanic Couple
31
Citations
0
References
1986
Year
Materials ScienceSolid-state IonicElectrical EngineeringIonic CurrentsEngineeringElectronic ConductorsCorrosionPolarization CurvesElectrode-electrolyte InterfaceApplied PhysicsIonic Current DensitiesElectrical PropertyElectrochemical InterfaceElectrochemistryElectrical InsulationIonic Current Density
One‐dimensional measurements of the ionic current density in the nearfield of a corroding iron‐copper galvanic couple were made, and the results were compared with the predictions of a finite element model that calculates near field potential and current density distributions. The component of the ionic current density normal to the galvanic couple was measured using a scanning vibrating electrode technique. The finite element calculations were based on the individual, measured polarization curves of the constituent materials. Agreement was excellent. The results demonstrated the need for 3‐D ionic current density measurements to characterize completely ionic currents from the couple.