In-Situ Monitoring and Analysis of the Pitting Corrosion of Carbon Steel by Acoustic Emission
Source abstract
Abstract
The acoustic emission (AE) technique was applied to monitor the pitting corrosion of carbon steel in NaHCO3 + 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.
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Research context
OpenAlex topics: Hydrogen embrittlement and corrosion behaviors in metals · Corrosion Behavior and Inhibition · Ultrasonics and Acoustic Wave Propagation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China
School of Material Science and Engineering, Southwest Petroleum University, Chengdu 610500, China
CNOOC Energy Technology & Services-Shanghai Environmental Engineering & Technology Branch, Shanghai 200335, China
Funding
Department of Science and Technology of Sichuan Province · Project Funding to Scientific Research Innovation Team of Universities Affiliated to Sichuan Province
References (36)
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