Monitoring Corrosion in Oxide and Chloride Environments Using Ultrasonic Guided Waves

Ultrasonic guided waves for monitoring corrosion of FRP wrapped concrete structures

“…It has been observed in previous studies [31][32][33][34][35]37,45] that L(0, 1) is a surface sensitive mode which is sensitive to surface modifications in the reinforcing bars due to corrosion and picks up the initial delamination of the reinforcing bar from the surrounding concrete. Similarly, L(0, 7) mode is a core sensitive mode which could pick up another major effect of chloride corrosion, pitting in the bar.…”

“…The ultrasonic system for the pulse transmission testing mode has been explained in [31][32][33][34][35]. A brief discussion of the pulse echo mode is included here.…”

“…In their prior research the authors have observed that specific ultrasonic guided wave modes are capable of monitoring core and surface areas of waveguides [31]. By studying the modal displacement and energy distribution functions, specific modes can be identified that are sensitive to surface changes.…”

Monitoring freshly poured concrete using ultrasonic waves guided through reinforcing bars

“…Moreover, the most suitable ultrasonic guided wave modes have been chosen based on the authors' prior research. The authors have reported that specific ultrasonic guided wave modes are effective in monitoring core and surface areas of waveguides [32]. By studying the modal displacement and energy distribution functions, specific modes can be identified that are sensitive to surface changes [33,34].…”

A new standing‐wave testing system for bridge structure nondestructive damage detection using electromagnetic wave

“…Ultrasonic inspection techniques have been used to detect strength‐reducing defects in bridge structural members. Sharma and Mukherje used ultrasonic‐guided waves to monitor the progression of rebar corrosion in chloride‐ and oxygen‐rich environments. Terzic and Pavlovic used image processing (image pro plus) and ultrasonic pulse velocity on corundum‐ and bauxite‐based refractory concretes.…”