Scanning Microelectrode Studies of Early Pitting Corrosion of 18/8 Stainless Steel

Lin, Changjian; Luo, Jing; Zhuo, XD; Tian, Z. Q.

doi:10.5006/1.3284852

Cited by 26 publications

(20 citation statements)

References 2 publications

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“…An advantage of SECM is its capability to probe charge transfer occurring nonuniformly at interfaces [13,14]. Scanning reference electrode technique (SRET) has been used for determination of the potential distribution on corroding surfaces [15][16][17][18][19][20] and scanning tunneling microscope (STM) is a technique to study corrosion at micro-and nano-scale [21][22][23][24]. Zhu et al [10] investigated the impact of tensile and compressive stress on reactivity of the Alloy 800 C-ring sample using SECM and found that both tension and compression increased the localized surface reactivity, indicating corrosion susceptibility of Alloy 800 under stress in thiosulfate-contained chemistries.…”

Section: àmentioning

confidence: 99%

Understanding the interaction of thiosulfate with Alloy 800 in aqueous chloride solutions using SECM

Xia

Zhu

Behnamian

et al. 2015

Journal of Electroanalytical Chemistry

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Section: àmentioning

confidence: 99%

Understanding the interaction of thiosulfate with Alloy 800 in aqueous chloride solutions using SECM

Xia

Zhu

Behnamian

et al. 2015

Journal of Electroanalytical Chemistry

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“…Different local electrochemical and microscopic techniques have been developed for in-situ corrosion studies, allowing characterization of metal-electrolyte interfaces while monitoring ongoing corrosion processes. Local probing techniques include microelectrode (Garfias-Mesias and Sykes, 1999), microcell (Kobayashi et al, 2000;Perren et al, 2001), local EIS (Annergren, 1996;Bayet et al, 1998), scanning vibration electrode technique (SVET) (Uchida et al, 2001), scanning reference technique (SRET) (Sargeant and Ronaldson, 1996;Lin et al, 1998), scanning tunneling microscopy (STM) (Fan and Bard, 1989;Miyasaka and Ogawa, 1990), atomic force microscopy (AFM) (Rynders et al, 1994;Reynaud-Laporte et al, 1997;Garfias-Mesias and Siconolfi, 2000;Williford et al, 2000), scanning electrochemical microscopy (SECM) Williams, 1997, 2000;Tanabe et al, 1998;Williams et al, 1998;Paik et al, 2000), scanning Kelvin probe (SKP) (Han and Mansfeld, 1997;Chen et al, 1998), and combination of these techniques (Böhni et al, 1995;de Wit et al, 1998;Guillaumin et al, 2001). Microelectrodes and microcells enable probing of small areas.…”

Section: Local Probing Studies Using Stm/afm Local Probing Techniquesmentioning

confidence: 99%

Studying the Passivity and Breakdown of Duplex Stainless Steels at Micrometer and Nanometer Scales – The Influence of Microstructure

Pan

2020

Front. Mater.

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Duplex stainless steels (DSSs) consist of ferrite and austenite phases with approximately equal volume fraction. They exhibit combined superior mechanical strength and corrosion resistance, therefore are increasingly used in various applications. However, under certain conditions, passivity breakdown may occur, leading to corrosion initiation, which is often related to weak points in the heterogeneous microstructure. To understand the influence of microstructure on the passivity and breakdown of DSSs requires local probing techniques that can be used in situ, so that corrosion initiation process can be correlated to the microstructure. Recent studies employing advanced scanning probe microscopy and synchrotron-based techniques, in combination with electrochemical measurements, have contributed to a deep understanding of the passive film, passivity breakdown, and corrosion initiation of DSSs, as well as the influence of microstructural and environmental factors. This mini review presents a short summary of recent literature focusing on the studies utilizing local probing techniques and synchrotron-based analyses.

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“…Among various scanning probe techniques applied for imaging corrosion in the past decade, − the scanning microreference electrode (SMRE) is a noninvasive tool for the in situ imaging of pitting corrosion, ,− but its spatial resolution is not high enough to sense unstable pitting initiation in the very early stage and to distinguish selective phase dissolution. Fortunately, STM has been confirmed to be a powerful in situ technique to study selective phase dissolution. , However, pitting initiation always shows a typical random behavior in nature, , and it is usually difficult to sense the dynamic and random signal during pitting initiation at its early stage by the traditional STM technique …”

Section: Introductionmentioning

confidence: 99%

Integrated Scanning Electrochemical Probes Assisted by ECSTM for In Situ Imaging of the Pitting Corrosion Process of Carbon Steel in SCCP Solutions

Ye,

Lin,

et al. 2023

J. Phys. Chem. C

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Pitting corrosion of steel is a common phenomenon featuring a random and dynamic process. An understanding of the mechanism and origin of pitting initiation in the early stage remains ambiguous because it is difficult to sense the pitting activity, topographical variations, and local environment at or around pits of carbon steel in situ in a simulated carbonated concrete pore (SCCP) solution. In this work, integrated scanning electrochemical probes assisted by electrochemical scanning tunneling microscopy (ECSTM) were developed to concurrently image the local topography, local pH, and pitting activity in situ in the vicinity of the pits. Ex situ surface topographies and element contents were also determined by scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). It was found that the pitting initiated at a high rate when carbon steel was immersed in SCCP solution, and then the pitting merged to form beam-like localized corrosion and uniform corrosion finally. The local pH became lower in the vicinity of the pits during the pitting initiation. The results demonstrated that the nuclei of pitting corrosion occurred close to the MnS inclusion or ferrite phase at the steel surface due to selective phase dissolution. Integrated scanning electrochemical probes enabled us to obtain correlated information about the pitting activity, topography, and local environment around pits, which is powerful for the in situ imaging of pitting corrosion with higher resolution and for further understanding the mechanism of localized corrosion of carbon steel in various service environments.

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Scanning Microelectrode Studies of Early Pitting Corrosion of 18/8 Stainless Steel

Cited by 26 publications

References 2 publications

Understanding the interaction of thiosulfate with Alloy 800 in aqueous chloride solutions using SECM

Understanding the interaction of thiosulfate with Alloy 800 in aqueous chloride solutions using SECM

Studying the Passivity and Breakdown of Duplex Stainless Steels at Micrometer and Nanometer Scales – The Influence of Microstructure

Integrated Scanning Electrochemical Probes Assisted by ECSTM for In Situ Imaging of the Pitting Corrosion Process of Carbon Steel in SCCP Solutions

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