Phase Space Reconstruction based Methodology of Real Time Detection of Corrosion in Ship Steel using AE Sensors

In a ship’s operational years, corrosion is one of the main causes of damage reducing structural reliability, safety, and availability and eventually results in a failure. Thus, real-time structural health monitoring of ships is necessary yet challenging. A prominent non-destructive testing approach, acoustic emission (AE), has been shown to be helpful in evaluating corrosion deterioration. In the current study, a methodology for impact assessment of corrosion utilising a readily accessible real-time AE time domain signal is developed. In this study, DMR249A high strength low alloy(HSLA) ship steel was subjected to potentiodynamic polarization experiments at two distinct scan rates at every 5 minutes interval. The material’s micro-structure was examined by carrying out the field emission scanning electron microscopy (FESEM) analysis in between 5 minutes intervals. In order to verify the corrosion deformation taking place on the specimen, the methodology’s output was correlated to the FESEM images.