A NOVEL REMOTE FIELD EDDY-CURRENT TECHNIQUE FOR INSPECTION OF THICK-WALLED ALUMINUM PLATES

The remote field eddy current technique has been used for inspecting f erromagnetic tubular products for several years. This technique is cha racterized by its high sensitivity to anomalies at large depths and qu al sensitivity to anomalies irrespective of their location in the tube wall. In recent years, the method has been extended to the inspection of metallic plates. This paper introduces a prototype remote field ed dy current probe for the inspection of thick aluminum plates. Modeling and experimental data obtained using the prototype probe are presente d.