Acoustic emission behaviour during the evolution of a single pit on stainless steels

Wu, Yunlong; Nong, Jing; Yuan, Sui; Guo, Qi; Xu, Jian

doi:10.1016/j.corsci.2021.109308

Cited by 8 publications

(3 citation statements)

References 34 publications

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“…22) AE method has long been used to study the metal corrosion. However, most attentions including the latest AE reports, [23][24][25][26][27][28][29][30][31][32][33] have been paid on the steel corrosion. The literature [34][35][36][37][38][39] on AE studies on the corrosion of Mg and Mg alloys is very limited.…”

Section: ¹mentioning

confidence: 99%

A Comparative Investigation of Corrosion Behavior and the Concurrent Acoustic Emission of AZ31 Mg Alloy under NaCl and Na2SO4 Solution Droplets

Wu,

Ito,

Enoki

2024

Mater. Trans.

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In this work, corrosion behavior and the concurrent acoustic emission (AE) signals of AZ31 alloy under NaCl and Na 2 SO 4 solution droplets were comparatively investigated in combination with in-situ optical microscopy observations. It was observed that after a short initial corrosion accompanied by the growth and rupture of H 2 bubbles, the later corrosion behavior of AZ31 alloy mainly developed into filiform corrosion under NaCl solution droplet and pitting corrosion under Na 2 SO 4 solution droplet. AE signals were detected in both cases. In particular, AE parameters of amplitude and duration were found to well identify filiform and pitting corrosion. AE signals were mainly correlated with the observed evolution of H 2 bubbles of different shapes and positions, i.e., regularly round bubbles grew and ruptured at the filament head near the metal surface during filiform corrosion; whereas irregularly-shaped bubbles grew and ruptured at the pit mouth during pitting corrosion.

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Section: ¹mentioning

confidence: 99%

A Comparative Investigation of Corrosion Behavior and the Concurrent Acoustic Emission of AZ31 Mg Alloy under NaCl and Na2SO4 Solution Droplets

Wu,

Ito,

Enoki

2024

Mater. Trans.

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“…The acoustic emissions (AE) technique, which is a passive ultrasound method, is widely recognised as an effective method for monitoring of corrosion damage [ 28 ]. Each possible AE source during the corrosion process can be described with its specific properties [ 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 ]. Hydrogen gas evolution and breakdown of surface oxide films have been pointed out as possible AE sources by Yuyama et al [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

“…The authors also suggested that the change of corrosion mode from pitting to uniform corrosion can be followed by the AE technique, as the representative parameters (e.g., rise time and counts number) are drastically affected. In the pitting corrosion process, instantaneous stress changes on the metal surface, rupture of the passivation film, corrosion potential fluctuations, and hydrogen bubble evolution have been suggested as possible mechanisms for AE sources [ 36 , 37 , 38 , 39 , 44 ]. Regarding the uniform corrosion process, hydrogen bubbles release, friction of hydrogen bubbles, and the evolution of corrosion deposits are indicated as predominant sources of AE signals [ 41 ].…”

Section: Introductionmentioning

confidence: 99%

Non-Contact Acoustic Emission Monitoring of Corrosion under Marine Growth

Alkhateeb

Riccioli

Morales³

et al. 2022

Sensors

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Offshore support structures and mooring systems are predominantly subject to corrosion and fatigue. These structures are typically covered with marine growth of various types. Conventional inspection methods for assessment of the structural integrity require access to the cleaned surface of these structures; however, the cleaning process is highly undesirable from the technical, economical, and environmental points of view. This paper highlights research on feasibility assessment of detection and localization of corrosion damage under marine growth using acoustic emission (AE). Experiments were conducted on two carbon steel plates, one baseline sample and one covered with artificially fabricated marine growth. The results of accelerated corrosion experiments suggest that corrosion-induced ultrasound signals can be detected with satisfactory signal-to-noise ratio using non-contact AE sensors. Ultrasound waves passing through marine growth showed around 12 dB drop in amplitude when compared to the base plate. A localization algorithm for corrosion induced-ultrasound signals was successfully implemented.

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Research on pitting corrosion characteristics of X90 steel based on acoustic emission and electrochemistry methods

Bi,

Miao,

Sun

et al. 2023

Arabian Journal of Chemistry

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Acoustic emission behaviour during the evolution of a single pit on stainless steels

Cited by 8 publications

References 34 publications

A Comparative Investigation of Corrosion Behavior and the Concurrent Acoustic Emission of AZ31 Mg Alloy under NaCl and Na<sub>2</sub>SO<sub>4</sub> Solution Droplets

A Comparative Investigation of Corrosion Behavior and the Concurrent Acoustic Emission of AZ31 Mg Alloy under NaCl and Na<sub>2</sub>SO<sub>4</sub> Solution Droplets

Non-Contact Acoustic Emission Monitoring of Corrosion under Marine Growth

Research on pitting corrosion characteristics of X90 steel based on acoustic emission and electrochemistry methods

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