Study of imitative micro pit morphology evaluation
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Author list: Panmongkol, Picha; Rojviriya, Catleya; Phung-On, Isaratat
Publisher: IOP Publishing
Publication year: 2023
Volume number: 10
Issue number: 4
ISSN: 2053-1591
eISSN: 2053-1591
Languages: English-Great Britain (EN-GB)
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Abstract
This study examined the imitative micro pit formation of pitting corrosion on 304 stainless steel under electrochemical control in a 3.0% NaCl solution. Results demonstrated that the micro pits changed from a conical to a cap shape during growth, indicating that their evolution in shape and growth did not follow the same morphology over time. Additionally, the piecewise polynomial method was employed to compare real-time micro pit growth morphology evolution with current density, which was consistent with cross-sectional images of actual micro pits, enabling the separation of the pitting corrosion stages. Furthermore, 3D images obtained from SRXTM were similar to cross-sectional images of real micro pits, further validating the technique’s usefulness in studying micro pits. © 2023 The Author(s). Published by IOP Publishing Ltd.
Keywords
faraday’s law, micro pit, pitting, SRXTM
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