Passivation behavior of 316L stainless steel in artificial seawater: effects of pH and dissolved oxygen

Wang, Zhanhui; Wang, Yi; Zhang, Bowei; Zhang, Zhan; Xiao, Kui; Wu, Junsheng; Yao, Qiong; Ma, Guiping; Sun, Gang

doi:10.1108/acmm-09-2020-2367

Cited by 7 publications

(3 citation statements)

References 35 publications

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“…The dispersion effect caused by electrode surface roughness, etc, is replaced by the constant phase angle element (CPE) instead of the pure capacitance element in the simulation equivalent circuit, and the CPE impedance Z Q can be described as: Z Q = (jω) −n (Y 0 ) −1 , Y 0 is the CPE admittance module, ω is the angular frequency, j 2 = 1, n is the dispersion index of CPE, and its value range is 0 n 1. When n = 0.5, CPE is considered to be Warburg impedance; when n = 1, CPE is considered to be an ideal capacitor; when 0.5 < n < 1, CPE is a state between Warburg impedance and ideal capacitor [23].…”

Section: Resultsmentioning

confidence: 99%

Study on pitting behavior of HDR duplex stainless steel at different film-forming potentials

Lin,

Li,

Liu

et al. 2024

Phys. Scr.

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The influence of external potentials on the electrochemical corrosion characteristics and pitting resistance of Low Carbon High Chromium (H), Duplex (D), Corrosion Resistant (R) duplex stainless steel after film formation was investigated by techniques such as dynamic potential scanning, constant potential polarization, Electrochemical Impedance Spectroscopy (EIS), conjunction with Scanning Electron Microscope (SEM) and Energy Dispersive Spectroscopy (EDS) analysis, were used to examine the effects of passivation potential and over-passivation potential on the pitting resistance of HDR duplex stainless steel, compared with naturally film-formed HDR corrosion resistance. Results show that in a 3.5% NaCl solution, the passivation range of HDR duplex stainless steel is 0~1.0 V, with certain current fluctuation appearing in the unstable pitting region around 1.0 V. As the film formation potential increases, the impedance first increases then decreases, and the carrier concentration first decreases then increases. At 0.9 V, the impedance is at its maximum, the carrier concentration is at its minimum, and the corrosion resistance is the best; at 1.2 V, the impedance is at its minimum, the carrier concentration is at its maximum, and the corrosion resistance is the worst; the natural film formation sample falls between 0.1 V and 0.7 V. After pitting tests, pitting mainly occurs at the ferrite structure and its boundaries for the naturally film-formed and film-formed potentials below 1.0 V samples, but pitting mainly occurs at the austenite structure and its boundaries in the 1.2 V film-formed sample, indicating a reversal of corrosion in the structural pitting. The sample with the film formation potential of 0.1 V developed many small pits on the surface after pitting test, which is related to the oxidation of Mo.

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Section: Resultsmentioning

confidence: 99%

Study on pitting behavior of HDR duplex stainless steel at different film-forming potentials

Lin,

Li,

Liu

et al. 2024

Phys. Scr.

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“…The higher DO content causes an increase in the corrosion rate for brasses, but it makes no difference to the corrosion rate of the Cu-5Ni alloy on account of the barrier effect of corrosion products [21]. For 316L stainless steel, the oxygen content in the passive film formed in the oxygen-free solution is less, and then compared with the aerobic solution, the thickness of passive film is about half [22]. For the passive film of 2507 super duplex steel, although the electric field strength and point defect diffusivity decrease due to the removal of DO, it has no detectable impact on the dissolution of passive film [23].…”

Section: Introductionmentioning

confidence: 99%

Effect of Dissolved Oxygen Content on Tribo-Corrosion Behavior of Monel 400 Alloy in Seawater

Zhu,

Wang,

Liu

et al. 2023

Metals

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When serving in the marine environment, the corrosion of metals is inevitably affected by marine environmental factors, especially dissolved oxygen. This will affect the service life of metal in the marine environment. In this paper, a friction- and wear-testing machine, an electrochemical workstation, and a dissolved oxygen/temperature control system are employed to systematically study the influence of dissolved oxygen (DO) content on the tribo-corrosion characteristics of Monel 400 alloy in seawater. The results show that the DO content has a remarkable effect on the tribo-corrosion behavior of Monel 400 alloy. The corrosion of Monel 400 alloy increases with the increase in DO content, leading to the thickness of corrosion product increasing at higher DO contents. The corrosion product is mainly composed of Ni(OH)2, Cu2O, CuO, and Cu(OH)2. While the corrosion of Monel 400 alloy further affects the wear rate of the alloy, when the corrosion is inhibited, the change of DO content has no effect on the wear rate of Monel 400 alloy. In addition, the inhibition influence of corrosion on mechanical wear is found, which is attributed to the excellent lubrication performance of corrosion products.

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“…Anyway, the breakdown of passive film, as the first step of pitting corrosion, is of great significance. It is therefore not surprising that corrosion resistance of materials has in the past several decades, been correlated directly to passive film stability (Maurice et al , 1998; Fujimoto et al , 1998; Maurice et al , 2002; Maurice and Marcus, 2012; Ohtsuka et al , 2016; Maurice and Marcus, 2018; Wang et al , 2021; Zhang et al , 2021; He et al , 2022; Hu et al , 2022; Niu et al , 2022; Liu et al , 2023). Accordingly, deciphering the critical factors determining the stability of passive film is of great significance and has been a fundamental issue in corrosion science (Wei et al , 2022).…”

Section: Introductionmentioning

confidence: 99%

New understanding on the critical factors determining stability of passive film on Fe-Cr alloy based on aberration-corrected TEM study

Zhang,

Wei,

2023

ACMM

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Purpose In recent years, using aberration-corrected transmission electron microscopy, the authors have achieved precisely detecting the structural evolution of passive film as well as its interface zone at atomic scale. The purpose of this paper aims to make a brief review to show the authors’ new understanding and perspective on the issue of critical factors determining stability of passive film of Fe-Cr alloy. Design/methodology/approach The introduction of single crystal enabled the authors to obtain a distinct metal/passive film interface and better characterize the structure of the interface region. The authors use aberration-corrected TEM to conduct cross-sectional observation and directly capture the details across the entire film at a high spatial and energy resolution. Findings Apart from the passive film itself, the interface zone, including metal/film (Me/F) interface and the adjacent metal side, is also the site which is attacked. Accordingly, the nature of the interface zone, such as microstructure, composition and atomic configuration, is one of the critical factors determining the stability of passive film. Originality/value Deciphering the critical factors determining the stability of passive film is of great significance and has been a fundamental issue in corrosion science. Great attention has been paid to the nature of the passive film itself. In contrast, the possible role of the interface between the passive film and the metal is rarely taken into account. Based on the advanced analytical tool with high spatial resolution, the authors have specified the significant role of interface structures on the macro-scale stability of passive film.

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Passivation behavior of 316L stainless steel in artificial seawater: effects of pH and dissolved oxygen

Cited by 7 publications

References 35 publications

Study on pitting behavior of HDR duplex stainless steel at different film-forming potentials

Study on pitting behavior of HDR duplex stainless steel at different film-forming potentials

Effect of Dissolved Oxygen Content on Tribo-Corrosion Behavior of Monel 400 Alloy in Seawater

New understanding on the critical factors determining stability of passive film on Fe-Cr alloy based on aberration-corrected TEM study

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