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

Aili Ma; Lianji Zhang; Dirk Engelberg; Qingmiao Hu; Shaokang Guan; Yugui Zheng

doi:10.1016/j.corsci.2019.108320

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

Aili Ma, Lianji Zhang, Dirk Engelberg, Qingmiao Hu, Shaokang Guan, Yugui Zheng

Materials Engineering

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Abstract

The purpose of this paper is to provide a new understanding of the anisotropic corrosion behavior of 90Cu10Ni alloy. A clear correlation between grain orientations, SKPFM derived work functions (WF), and dissolution rate is demonstrated. Grains close to (100) exhibited lower WF with lower dissolution rate, whereas grains close to (111) with higher WF dissolved faster. A surface step dissolution model is proposed for faster dissolution of the closest packed (111) planes. Calculations based on coordination number and the first-principles were performed to evaluate the proposed model. Calculation results correspond well with each other, and supported the experimental results observed.

Original language	English
Journal	Corrosion Science
Early online date	9 Nov 2019
DOIs	https://doi.org/10.1016/j.corsci.2019.108320
Publication status	Published - 2019

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10.1016/j.corsci.2019.108320

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

abstract = "The purpose of this paper is to provide a new understanding of the anisotropic corrosion behavior of 90Cu10Ni alloy. A clear correlation between grain orientations, SKPFM derived work functions (WF), and dissolution rate is demonstrated. Grains close to (100) exhibited lower WF with lower dissolution rate, whereas grains close to (111) with higher WF dissolved faster. A surface step dissolution model is proposed for faster dissolution of the closest packed (111) planes. Calculations based on coordination number and the first-principles were performed to evaluate the proposed model. Calculation results correspond well with each other, and supported the experimental results observed. ",

author = "Aili Ma and Lianji Zhang and Dirk Engelberg and Qingmiao Hu and Shaokang Guan and Yugui Zheng",

year = "2019",

doi = "10.1016/j.corsci.2019.108320",

language = "English",

journal = "Corrosion Science",

issn = "0010-938X",

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T1 - Understanding crystallographic orientation dependent dissolution rates of 90Cu-10Ni alloy: New insights based on AFM/SKPFM measurements and coordination number/electronic structure calculations

AU - Ma, Aili

AU - Zhang, Lianji

AU - Engelberg, Dirk

AU - Hu, Qingmiao

AU - Guan, Shaokang

AU - Zheng, Yugui

PY - 2019

Y1 - 2019

N2 - The purpose of this paper is to provide a new understanding of the anisotropic corrosion behavior of 90Cu10Ni alloy. A clear correlation between grain orientations, SKPFM derived work functions (WF), and dissolution rate is demonstrated. Grains close to (100) exhibited lower WF with lower dissolution rate, whereas grains close to (111) with higher WF dissolved faster. A surface step dissolution model is proposed for faster dissolution of the closest packed (111) planes. Calculations based on coordination number and the first-principles were performed to evaluate the proposed model. Calculation results correspond well with each other, and supported the experimental results observed.

AB - The purpose of this paper is to provide a new understanding of the anisotropic corrosion behavior of 90Cu10Ni alloy. A clear correlation between grain orientations, SKPFM derived work functions (WF), and dissolution rate is demonstrated. Grains close to (100) exhibited lower WF with lower dissolution rate, whereas grains close to (111) with higher WF dissolved faster. A surface step dissolution model is proposed for faster dissolution of the closest packed (111) planes. Calculations based on coordination number and the first-principles were performed to evaluate the proposed model. Calculation results correspond well with each other, and supported the experimental results observed.

U2 - 10.1016/j.corsci.2019.108320

DO - 10.1016/j.corsci.2019.108320

M3 - Article

SN - 0010-938X

JO - Corrosion Science

JF - Corrosion Science

ER -

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

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