Detection of Corrosion in Piping using Eddy Current Testing with Magnetic Saturation
Details
Eddy current testing with magnetic saturation was investigated to detect and evaluate corrosion in ferromagnetic steel piping. Advantages of the technique shown as follows were obtained through this investigation. (1) Local corrosion can be detected with high detectability. (2) Testing speed is much higher comparing with any other NDT methods such as ultrasonic testing (UT). (3) Inner and outer flaw can be identified using analysis of signal phase in specific frequency. (4) Mapping of corrosion distribution can be displayed with probe scanning.
