Innovative magnet-ultrasonic-fusion sensing for local corrosion risk estimation

Abstract

Medium-risk-level components are vital for managing risks in industrial processes, owing to the significant threat posed by anomalous corrosion, particularly local anomalous corrosion. Effective risk and alarm monitoring is essential for the detection of these anomalies. Given the unique nature of local anomalous corrosion, the monitoring system must have sectional capabilities and offer multidimensional quantitative or semi-quantitative detection of local corrosion defects, which current in-service technologies such as ultrasonic wall thickness reading and the field signature method (FSM) fail to adequately address. A novel nondestructive sensing technology using magnet-ultrasonic-fusion signals is proposed to predict the equivalent defect depth of local corrosion by utilizing extensive data from ultrasonic and magnetic tests. Additionally, a new risk-monitoring system was developed to oversee local corrosion risks and issue safety alerts for local anomalies based on China's corrosion risk-management practices and integrity operating window (IOWs) standards.