Estimating corrosion induced thickness loss in Q690E high-strength steel using multimodal ultrasonic guided waves.

The estimation of corrosion induced thickness loss is critical for evaluating the remaining strength of high-strength steel (HSS) structures, particularly due to their emerging applications in ocean platforms and coastal bridges. In this study, an ultrasonic approach based on multimodal guide waves is proposed to identify thickness loss induced by electrical accelerated corrosion (EAC) in Q690E HSS samples. Both pitting corrosion and uniform corrosion were observed in the samples during the EAC testing.