Phased Array Ultrasonic Testing - Corrosion Mapping

Phased array ultrasonic testing (PAUT) is an advanced form of ultrasonic testing that uses multiple small ultrasonic elements within a single probe. Instead of sending one fixed sound beam into the material, phased array systems electronically control the timing (or phasing) of each element. By adjusting these time delays, the sound beam can be steered, focused, and swept through different angles without physically moving the probe. This allows inspectors to examine a larger area more efficiently compared to conventional ultrasonic testing.

When the phased array probe sends sound waves into the material, the returning echoes are collected and processed by specialized software. The system can create detailed visual displays, such as sectorial (S-scan) or linear (L-scan) images, that show cross-sectional views of the component. These images make it easier to detect, size, and locate defects like cracks, lack of fusion, porosity, or inclusions. Because multiple angles can be generated from one probe position, coverage is improved and inspection time is often reduced.