NDLI: In-Situ Monitoring and Analysis of the Pitting Corrosion of Carbon Steel by Acoustic Emission

Content Provider	Directory of Open Access Journals (DOAJ)
Author	Junlei Tang Junyang Li Hu Wang Yingying Wang Geng Chen
Abstract	The acoustic emission (AE) technique was applied to monitor the pitting corrosion of carbon steel in $NaHCO_{3}$ + NaCl solutions. The open circuit potential (OCP) measurement and corrosion morphology in-situ capturing using an optical microscope were conducted during AE monitoring. The corrosion micromorphology was characterized with a scanning electron microscope (SEM). The propagation behavior and AE features of natural pitting on carbon steel were investigated. After completion of the signal processing, including pre-treatment, shape preserving interpolation, and denoising, for raw AE waveforms, three types of AE signals were classified in the correlation diagrams of the new waveform parameters. Finally, a 2D pattern recognition method was established to calculate the similarity of different continuous AE graphics, which is quite effective to distinguish the localized corrosion from uniform corrosion.
e-ISSN	20763417
DOI	10.3390/app9040706
Journal	Applied Sciences
Issue Number	4
Volume Number	9
Language	English
Publisher	MDPI AG
Publisher Date	2019-02-01
Publisher Place	Switzerland
Access Restriction	Open
Subject Keyword	Technology Engineering (general). Civil Engineering (general) Biology (general) Physics Chemistry Carbon Steel Pitting Corrosion Acoustic Emission Wavelets Pattern Recognition
Content Type	Text
Resource Type	Article

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In-Situ Monitoring and Analysis of the Pitting Corrosion of Carbon Steel by Acoustic Emission