What is Eddy Current Testing & Inspection?

1. What is Eddy Current Testing & Inspection? Eddy current testing is one of the many non-destructive methods for flow detection in conductive materials. These materials rely upon electromagnetic principles called electromagnetic induction. A specially designed coil is energized with alternating-current and is placed in the proximity of the surface. The coil generates a steady magnetic field that interacts with the testing area and produces eddy current in the conducting area. Eddy current inspection is used to examine the conductivity of any material from near-surface detection depending on material thickness. The variations in the phases and magnitude of the eddy current are constantly monitored through a receiver coil and measured via the changes to the alternating-current power flowing through the primary coil. Standards and Calibration for Eddy Current Testing All the equipment used for eddy current testing need to be properly calibrated using appropriate referencial standards. The calibration block for the eddy current inspection equipment needs to be the same material with similar heat treated conditions, shape, and size of the item that is to be tested. Common Applications of Eddy Current Testing ●Weld Inspection ●Conductivity Testing ●Surface Testing ●Corrosion Testing ●Bolt Hole Inspection ●Tubing Inspection Advantages of Eddy Current Testing

2. ●Testing surface and near-surface cracks as small as 0.5mm ●Detection of defects through several layers of non-conductive surface coatings without any planner defect interference ●Non-contact testing methods allow the inspection of high-temperature surfaces and underwater surfaces ●Effectively tests objects with complicated physical structure and geometry ●Provides measurements for electrical conductivity of all test objects ●Can be an automated process to test uniform materials like wheels, boilers, aero-engines, and more