Acoustic Emission during Hydrogen Charging of a Pipeline Steel

Мерсон, Д. Л.; Dement'ev, Sergey; Ioffe, A. V.; Suvorov, P. V.; Vinogradov, Alexei

doi:10.2355/isijinternational.51.1682

Cited by 2 publications

(4 citation statements)

References 14 publications

(15 reference statements)

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“…It is enough to choose one between duration and counts because of the strong correlation. Therefore, duration, energy, peak frequency, and spectrum gravity were chosen as the main characteristics for signal discrimination, which is also consistent with others’ work [ 9 , 12 ].…”

Section: Results and Discussion About Signals Discriminationsupporting

confidence: 67%

“…This suggested that Type 1 signals are possibly from H 2 evolution because a large amount of small hydrogen gas bubbles were observed immediately after applying the current. At the same time, in light of the results of other researchers [ 9 , 10 , 11 , 12 , 22 , 23 ], signals from H 2 bubbles are of low frequencies. Therefore, signals of Type 1 are likely to be generated by H 2 evolution while those of Type 3 are from crevice corrosion.…”

Section: Results and Discussion About Signals Discriminationmentioning

confidence: 86%

“…Commonly, experimental tests that obtained fractures of HIC are performed with passing H 2 S gas according to ANSI/NACE Standard TM0284-2003 [ 8 ]. Merson et al [ 9 ] used wideband AE sensor MSEA-L2 to monitor HIC activities in 09GSF pipeline steel under experimental conditions using a 5% NaCl and 0.4% CH 3 COONa solution with H 2 S at a partial pressure of 1 bar. They distinguished three types of signals from H 2 evolution, FeS film formation, and HIC, respectively, at different stages with different frequency spectra of signals.…”

Section: Introductionmentioning

confidence: 99%

“…It has a peak resonance at 150 kHz, and its frequency response ranges from 100 to 450 kHz. Therefore, the VS150-RIC sensor may respond well to HIC signals whose main frequency band is 150 to 200 kHz [ 9 ]. However, considering that the average frequency of HIC signals reported by Smanio et al [ 11 ] is between 0 to 100 kHz, a resonant sensor with a wider response frequency was also introduced for comparison.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Comparison of Two Types of Acoustic Emission Sensors for the Characterization of Hydrogen-Induced Cracking

Liu

Wang

Yang

et al. 2023

Sensors

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Acoustic emission (AE) technology is a non-destructive testing (NDT) technique that is able to monitor the process of hydrogen-induced cracking (HIC). AE uses piezoelectric sensors to convert the elastic waves generated from the growth of HIC into electric signals. Most piezoelectric sensors have resonance and thus are effective for a certain frequency range, and they will fundamentally affect the monitoring results. In this study, two commonly used AE sensors (Nano30 and VS150-RIC) were used for monitoring HIC processes using the electrochemical hydrogen-charging method under laboratory conditions. Obtained signals were analyzed and compared on three aspects, i.e., in signal acquisition, signal discrimination, and source location to demonstrate the influences of the two types of AE sensors. A basic reference for the selection of sensors for HIC monitoring is provided according to different test purposes and monitoring environments. Results show that signal characteristics from different mechanisms can be identified more clearly by Nano30, which is conducive to signal classification. VS150-RIC can identify HIC signals better and provide source locations more accurately. It can also acquire low-energy signals better, which is more suitable for monitoring over a long distance.

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Section: Results and Discussion About Signals Discriminationsupporting

confidence: 67%