Study on The Measurement by The Behavior and Ultrasonic Spectroscopy Method of Amine Stress Corrosion Cracking Tip Region

Abstract

In conventional linear ultrasonic flaw detection method, since an ultrasonic wave incident on a steel material is excited at an interface having a difference in acoustic impedance, opening crack can be detected. However, the backscattered waves at ultrasonic spectroscopy method (noise) is the most suitable for detecting and evaluating precursory minute defect size of deterioration damage to equipment along with aging of amine stress corrosion cracking. This approach focuses on power spectrum intensity of a specific frequency band, to grasp precursor behavior by comparing area values of the power spectral intensity is confirmed with an actual device, and thus life expectancy can be predicted.