The pulsed eddy current (PEC) technique is widely used to detect and quantify flaws in conducting plates .This method has been used to test materials subjected to heat treatment. Material properties such as conductivity show a marked change with temperature. As the heat diffuses into the material, the probe output changes owing to the changing material properties. Hence, it becomes difficult to...

Pulsed eddy current (PEC) stimulated thermography is proposed as a powerful non-destructive evaluation (NDE) technique, allowing the operator to observe the heating developed from the eddy current distribution in a structure using infrared imaging, detecting defects over a relatively wide area within a short time. Some defects (impact, delamination, disbond or crack) commonly occur in aerospace...

Corrosion is one of the important factors in equipment failures. Wall thinning can be used to evaluate corrosion conditions. However, most of equipments are coated with insulations in order to elevate the energy efficiency. Pulsed eddy current (PEC) testing technique can be used to measure wall thinning through insulation. But when the insulation outside is wrapped with galvanized steel, PEC si...

Metal piping in industrial plants is subject to corrosion under insulation, which reduces the wall thickness and limits service life operating conditions. The Pulsed Eddy Current (PEC) technique can be effective inspection of isolated metallic materials. However, changes magnetic permeability make its use difficult ferromagnetic steels. In this work, we used Neodymium magnets magnetize material...

Pulsed eddy current inspection techniques were derived from the conventional eddy current testing technology, based on the fundamental principle of an eddy current coil, but using periodic ultrasound pulses. The authors first introduce the principle of pulsed eddy current inspection and some experimental measurement results using pulsed eddy current equipment. This technology can be applied to ...

In Pulsed Eddy Current (PEC) testing, the response feature of one-dimensional magnetic field component, perpendicular to the conductor’s surface, is used to detect and quantify the defects. It is not sufficient for signal interpretation and noise suppression. A novel PEC probe, which consists of a tangential driver-coil and three orthorhombic pickup coils, is introduced in this paper. It is gre...

Detection and characterization of the material loss due to corrosion in aircraft fuselage joints plays an important role in life management of aging aircraft. Pulsed eddy current has been shown to effectively characterize hidden corrosion in lap splices. However, variation of the probe lift-off and interlayer gap can cause false indications or inaccuracy in quantification. This paper presents t...

Pulsed Eddy Current (PEC) sensing is used for Non-Destructive Evaluation (NDE) of the structural integrity of metallic structures in the aircraft, railway, oil and gas sectors. Urban water utilities also have extensive large ferromagnetic structures in the form of critical pressure pipe systems made of grey cast iron, ductile cast iron and mild steel. The associated material properties render N...

Corrosion has an important effect on the structural integrity of aging aircraft components, and an automatic and effective method of corrosion detection and classification can help to ensure the safe operation of a transportation system. Pulsed eddy current (PEC) has been shown to effectively characterize hidden corrosion in aircraft fuselage lap joints. However, two noise sources in the form o...

The Pulsed Eddy Current (PEC) testing is an increasingly emerging nondestructive testing & evaluation (NDT&E) technique. The main purpose of this study is to improve the performance of defect edge identification of C-scan imaging technique utilizing the rectangular PEC sensor. When sensor scans along the defect, peak waves of response signals always present a crest and a trough in direction of ...