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Corrosion of metal alloys is very common in the industrial field, and failure to monitor the seriousness of corrosion can cause serious consequences. Compared with other Non-Destructive Testing methods, the method of ultrasonic surface wave testing has a lot of advantages including portability, efficiency, and un-contamination etc. This makes it a very promising method to evaluate or monitor chemical...
Structural Health Monitoring (SHM) is a new and upcoming method of determining the integrity of structures. Sensor network based SHM systems have been developed and tested for monitoring of assets such as pipelines. In this paper, details on the system and monitoring aspects are presented along with potential applications and benefits for critical assets.
Facilities with tanks often present additional risks beyond site risks, such as potential injury to site personnel, damage to equipment and environment. The floor of an above ground storage tank is the most difficult part to access using online inspection method. In this paper, four on-line defect detection methods, such as volumetric or mass methods, acoustic emission (AE), soil vapor monitoring...
Hydrogen Induced Cracking (HIC) is one of failure types of in-service pressure vessels. Acoustic emission (AE) is a good method to monitor HIC. In order to investigate the characteristic of AE signals produced by HIC of carbon steel used in pressure vessel, the hydrogen charging progress of 20R steel was monitored using AE technique. There were three useful AE sources during the test, corrosion and...
Acoustic emission testing technique is a dynamic testing technology. In this paper, the relationship between the cumulative energy of acoustic emission and lower cycle reversal loads is studied based on results of the experiments on underwater concrete columns, and waveform acoustic emission signal of different destruction states is picked up. Spectrum analysis is carried out, the results of which...
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