Understanding crystallographic orientation dependent dissolution rates of 90Cu-10Ni alloy: New insights based on AFM/SKPFM measurements and coordination number/electronic structure calculations

Ma, Aiyuan; Zhang, Lianji; Engelberg, Dirk; Hu, Qing‐Miao; Guan, Shaokang; Zheng, Yuan

doi:10.1016/j.corsci.2019.108320

Cited by 30 publications

(11 citation statements)

References 59 publications

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“…In general, Cu

SC showed a larger radius of the capacitive loop than Cu

SC in different corrosion stages, which was opposite to conventional surface energy theory [ 11 ]. It was said that

planes in face-centered cubic (FCC) metals with the highest atomic density showed excellent corrosion resistance.…”

Section: Resultsmentioning

confidence: 65%

“…reported that the orientation-dependent corrosion rate of 90Cu-10Ni in acidic NaCl solution followed the order of (001) < (101) < (111) [ 10 ]. Ma [ 11 ] proposed a surface step dissolution model to explain the faster dissolution of the closest packed (111) planes, where coordination number played an important role in understanding the abnormal corrosion rate. Evenly in pure water, fine copper wires showed anisotropic dissolution where the dissolution rate increases in the order of (111) < (001) < (110) [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Impedance Spectroscopy (EIS) Explanation of Single Crystal Cu(100)/Cu(111) in Different Corrosion Stages

et al. 2023

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Copper and its alloys are used widely in marine environments, and anisotropic corrosion influences the corrosion kinetics of copper. Corrosion of copper in an electrolyte containing Cl− is described as a dissolution–deposition process, which is a prolonged process. Therefore, it is laborious to clarify the corrosion anisotropy in different stages. In this paper, electrochemical impedance spectroscopy (EIS) following elapsed open circuit potential (OCP) test with 0 h (0H), 24 h (24H) and 10 days (10D) was adopted. To exclude interruptions such as grain boundary and neighbor effect, single crystal (SC) Cu(100) and Cu(111) were employed. After 10D OCP, cross-sectional slices were cut and picked up by a focused ion beam (FIB). The results showed that the deposited oxide was Cu2O and Cu(100)/Cu(111) experienced different corrosion behaviors. In general, Cu(100) showed more excellent corrosion resistance. Combined with equivalent electrical circuit (EEC) diagrams, the corrosion mechanism of Cu(100)/Cu(111) in different stages was proposed. In the initial stage, a smaller capacitive loop of Cu(111) suggested preferential adsorption of Cl− on air-formed oxide film on Cu(111). Deposited oxide and exposed bare metals also played an important role in corrosion resistance. Rectangle indentations and pyramidal structures formed on Cu(100)/Cu(111), respectively. Finally, a perfect interface on Cu(100) explained the tremendous capacitive loop and higher impedance (14,274 Ω·cm2). Moreover, defects in the oxides on Cu(111) provided channels for the penetration of electrolyte, leading to a lower impedance (9423 Ω·cm2) after 10D corrosion.

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“…In general, Cu

SC showed a larger radius of the capacitive loop than Cu

SC in different corrosion stages, which was opposite to conventional surface energy theory [ 11 ]. It was said that

planes in face-centered cubic (FCC) metals with the highest atomic density showed excellent corrosion resistance.…”

Section: Resultsmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Electrochemical Impedance Spectroscopy (EIS) Explanation of Single Crystal Cu(100)/Cu(111) in Different Corrosion Stages

et al. 2023

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“…Using 2D-SOR microscopy, the sample can be measured in operando on a grain-to-grain basis, and this can be correlated with local information about the crystallographic orientation obtained from electron back scatter diffraction (EBSD). There is an increasing interest to study polycrystalline materials with spatially resolved techniques to deconvolute the current response of the whole surface into the contribution of individual grains. − This work demonstrates that 2D-SOR could be an excellent technique for such future studies, as long as the experimental setup allows for optical access.…”

Section: Discussionmentioning

confidence: 89%

Operando Surface Optical Reflectance Microscopy Study of Corrosion Film Growth on a Ni–Cr–Mo Alloy During Anodic Polarization

Larsson,

Vorobyova,

Pfaff

et al. 2023

J. Phys. Chem. C

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The solid–liquid interface, where corrosion reactions occur, is notoriously difficult to study in operando conditions. Few experimental techniques can provide surface sensitivity and spatial and temporal resolution and are compatible with liquid environments. 2-Dimensional surface optical reflectance (2D-SOR) is an emerging optical technique providing microscopic information with high temporal resolution. It complements methods such as ambient pressure X-ray photoelectron spectroscopy or inductively coupled plasma-mass spectrometry, which provides valuable chemical information from the surface and the dissolving species but lacks spatial resolution. Here, we show how 2D-SOR can be used to measure the formation and growth of corrosion products in operando through oscillations in the reflected signal caused by constructive and destructive interference of the light in the film of growing corrosion products. The total thickness of the corrosion product film obtained with 2D-SOR agrees well with that measured using scanning electron microscopy ex situ. 2D-SOR has proved to be an excellent and valuable tool for monitoring the corrosion process with spatial resolution in operating conditions.

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“…Rahimi et al [17] revealed that the Cu region has a higher Volta potential than the Ti region, and corrosion mainly occurred on the Cu side due to the increasing growth of the Ti passive film. Ma et al [18] studied the work function (WF) variation on different grain orientations of 90Cu-10Ni alloy by using SKPFM and found that grains close to (100) exhibited lower WF with lower dissolution rate, whereas grains close to (111) with higher WF dissolved faster. As mentioned above, the effect of residual stress gradient on the localised corrosion in the strengthen layer was not clearly known, hence, whether SKPFM technique can be used as a method to reveal the correlation of residual stress gradient with Volta potential has aroused great interest.…”

Section: A U T H O R Accepted Manuscriptmentioning

confidence: 99%

Volta potential mapping of the gradient strengthened layer in 20CrMnTi by using SKPFM

et al. 2020

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Understanding crystallographic orientation dependent dissolution rates of 90Cu-10Ni alloy: New insights based on AFM/SKPFM measurements and coordination number/electronic structure calculations

Cited by 30 publications

References 59 publications

Electrochemical Impedance Spectroscopy (EIS) Explanation of Single Crystal Cu(100)/Cu(111) in Different Corrosion Stages

Electrochemical Impedance Spectroscopy (EIS) Explanation of Single Crystal Cu(100)/Cu(111) in Different Corrosion Stages

Operando Surface Optical Reflectance Microscopy Study of Corrosion Film Growth on a Ni–Cr–Mo Alloy During Anodic Polarization

Volta potential mapping of the gradient strengthened layer in 20CrMnTi by using SKPFM

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