Remote field eddy current for examination of ferromagnetic tubes

Remote field eddy current (RFEC) is a low-frequency electromagnetic technique well suited to corrosion examination in small-bore ferromagnetic tubes such as carbon steel. Its success is based on continuing improvements in data display and analysis which greatly enhance the accuracy of defect characterization. Over the last few years, RFEC for the examination of small-bore ferromagnetic tubes has developed into a fully mature and distinct technology. New techniques greatly enhance its accuracy and power. New analysis and display techniques developed for RFEC have been field tested and are described in this paper. The new techniques have enhanced the defect characterization capabilities of RFEC and have increased the value of the technique to industry. RFEC has emerged as a technique and discipline distinct from ET.