Nondestructive Inspection of Underwater Coating Layers Using Ultrasonic Lamb Waves

Coatings play a crucial role in protecting ships and marine structures from corrosion extending their service life. The reliability of these coatings depends on proper maintenance, which turn, relies the application reliable diagnostic techniques. Non-destructive testing (NDT) techniques are useful material diagnostics, such as detecting debonded zone water. However, challenging access environment ocean, high attenuation characteristics itself add too many technical challenges. In this paper, we propose guided wave-based technique for characterizing bonded state coatings, uses FFT analysis different states. proposed has been demonstrated to be effective water through numerical experimental results.