Pitting Corrosion Behavior of CUSTOM 450 Stainless Steel Using Electrochemical Characterization

Omid Pedram; Yousef Mollapour; Hassan Shayani‑jam; Esmaeil Poursaeidi; Ramin Khamedi

doi:10.1007/s12540-020-00640-w

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자료유형: 학술저널

저자정보: Omid Pedram (University of Zanjan) Yousef Mollapour (University of Zanjan) Hassan Shayani‑jam (University of Zanjan) Esmaeil Poursaeidi (University of Zanjan) Ramin Khamedi (University of Zanjan)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.11

발행연도: 2021.11

수록면: 4,346 - 4,356 (11page)

DOI: 10.1007/s12540-020-00640-w

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In this study, the electrochemical polarization tests were performed on tensioned and non-tensioned CUSTOM 450 specimensin a 3.5 wt% NaCl solution to investigate pitting potential and stable pit initiation time. A potentiodynamic test wasconducted to determine the exact amount of pitting potentials. According to the potentiostatic tests, a relation between appliedpotential and the stable pit initiation time was obtained. Concerning this relation, stable pitting time can be predicted withoutexperimental works. Optical microscopy was used to evaluate the shape of the pits. Tensile stress led the pit to experiencethe “pit to crack” step. The corrosion rate of samples was studied by the determination of mass loss. Mass loss measurementsand current density?time curve in potentiostatic tests demonstrated the rate of pitting corrosion decreased as time passed. Finally, the depth of the pits was measured by the eddy current technique. The results showed that tensile stress facilitateddeeper pit development.

#Pitting corrosion #Electrochemical test #Eddy current #CUSTOM 450

참고문헌 (46)

참고문헌 신청

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