School of Engineering, London South Bank University, London SE1 0AA, UK.
NDT Section (NSIRC), TWI, Cambridge CB21 6AL, UK.
Sensors (Basel). 2021 Apr 26;21(9):3033. doi: 10.3390/s21093033.
This paper aims to design a coil sensor for corrosion monitoring of industrial pipes that could detect variations in thickness using the MFL (Magnetic Flux Leakage) technique. An MFL coil sensor is designed and tested with pipe sample thicknesses of 2, 4, 6, and 8 mm based on the magnetic field effect of ferrite cores. Moreover, a measurement setup for analysing pipe samples up to a temperature of 200° Celsius is suggested. Experimental results reveal that the MFL coil sensor can fulfil the requirements for MFL testing of pipes in high temperature conditions, and that the precision of MFL monitoring of pipes to detect corrosion at high temperatures can be improved significantly.
本文旨在设计一种用于工业管道腐蚀监测的线圈传感器，该传感器可利用漏磁场技术（MFL）检测厚度变化。根据铁氧体芯的磁场效应，设计并测试了一种适用于 2、4、6 和 8mm 管样厚度的 MFL 线圈传感器。此外，还提出了一种用于分析最高可达 200°C 温度下管样的测量设置。实验结果表明，MFL 线圈传感器能够满足高温条件下管 MFL 测试的要求，并且可以显著提高高温下腐蚀的 MFL 监测精度。
