Materials of magnetic flux leakage detectors

‌Material of magnetic flux leakage detectors mainly include permanent magnets and magnetic sensors. ‌

Magnetic flux leakage detectors usually use permanent magnets to magnetize ferromagnetic pipes. Taking the axial magnetization detector as an example, the permanent magnet magnetizes the pipe through a steel brush, and the yoke iron is connected to form a closed magnetic circuit. Where there are defects in the pipe wall, the magnetic flux leaks into the air to form a leakage flux, which is detected by the magnetic sensor to reflect the pipeline defects. ‌ In addition, magnetic flux leakage detectors may also use high-grade or high-permeability core materials to increase the core's magnetic binding capacity. ‌