Corrosion on a plate of magnesium alloy WZ73 in contact with 0.001 mol/L NaCl solution was analysed by long-range testing using the acoustic emission(AE)technique.At a distance d=1.66 m to the source,the Lamb wave pro...Corrosion on a plate of magnesium alloy WZ73 in contact with 0.001 mol/L NaCl solution was analysed by long-range testing using the acoustic emission(AE)technique.At a distance d=1.66 m to the source,the Lamb wave propagation of resulting AE events was examined and used for corrosion source location.As a first step,pencil lead break test was carried out and corresponding Lamb wave analysis served as reference to the varying corrosion signals of lower intensity.Additionally,the plate was excited by a piezo transducer for imitating a selected corrosion event.For analysis of the propagating wave field,the plate surface was measured by a scanning laser Doppler vibrometer(SLDV),allowing a high-resolution corrosion signal reconstruction and path tracking of direct and reflected Lamb wave packets.Based on the SLDV results,a deeper understanding of the complex wave field propagation during the sensor-based corrosion analysis was achieved.展开更多
文摘Corrosion on a plate of magnesium alloy WZ73 in contact with 0.001 mol/L NaCl solution was analysed by long-range testing using the acoustic emission(AE)technique.At a distance d=1.66 m to the source,the Lamb wave propagation of resulting AE events was examined and used for corrosion source location.As a first step,pencil lead break test was carried out and corresponding Lamb wave analysis served as reference to the varying corrosion signals of lower intensity.Additionally,the plate was excited by a piezo transducer for imitating a selected corrosion event.For analysis of the propagating wave field,the plate surface was measured by a scanning laser Doppler vibrometer(SLDV),allowing a high-resolution corrosion signal reconstruction and path tracking of direct and reflected Lamb wave packets.Based on the SLDV results,a deeper understanding of the complex wave field propagation during the sensor-based corrosion analysis was achieved.
