Effects of the electrolytes on the electrochemical behavior of nickel-base superalloys prepared by laser directed energy deposition

Yufeng Zhang; Jun Yu; Xin Lin; Pengfei Guo; Qiaodan Yan; Jianrui Liu; Weidong Huang

doi:10.1016/j.corsci.2023.111785

Effects of the electrolytes on the electrochemical behavior of nickel-base superalloys prepared by laser directed energy deposition

Yufeng Zhang, Jun Yu, Xin Lin, Pengfei Guo, Qiaodan Yan, Jianrui Liu, Weidong Huang

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The electrochemical behavior of Inconel 718 prepared by laser directed energy deposition with single γ-phase and dual (γ + γ″)-phase was investigated using 10 wt% NaNO₃, 5 wt% NaNO₃ + 5 wt% NaCl and 10 wt% NaCl, respectively. It is found that the Cl^- ion weakens the inhibitive effect of the transpassive film, resulting in a uniform electrochemical dissolution for deposits with the single γ-phase, but an inferior surface quality for deposits with the dual (γ + γ″) phases due to the γ″ phase inducing uneven pits expansion. Two qualitative models are proposed to demonstrate their electrochemical dissolution mechanism.

Original language	English
Article number	111785
Journal	Corrosion Science
Volume	228
DOIs	https://doi.org/10.1016/j.corsci.2023.111785
State	Published - Mar 2024

Keywords

Additive manufacturing
Electrochemical dissolution
Electrolytes
Inconel 718
Laser directed energy deposition
Transpassive film

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10.1016/j.corsci.2023.111785

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title = "Effects of the electrolytes on the electrochemical behavior of nickel-base superalloys prepared by laser directed energy deposition",

abstract = "The electrochemical behavior of Inconel 718 prepared by laser directed energy deposition with single γ-phase and dual (γ + γ″)-phase was investigated using 10 wt% NaNO3, 5 wt% NaNO3 + 5 wt% NaCl and 10 wt% NaCl, respectively. It is found that the Cl- ion weakens the inhibitive effect of the transpassive film, resulting in a uniform electrochemical dissolution for deposits with the single γ-phase, but an inferior surface quality for deposits with the dual (γ + γ″) phases due to the γ″ phase inducing uneven pits expansion. Two qualitative models are proposed to demonstrate their electrochemical dissolution mechanism.",

keywords = "Additive manufacturing, Electrochemical dissolution, Electrolytes, Inconel 718, Laser directed energy deposition, Transpassive film",

author = "Yufeng Zhang and Jun Yu and Xin Lin and Pengfei Guo and Qiaodan Yan and Jianrui Liu and Weidong Huang",

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year = "2024",

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doi = "10.1016/j.corsci.2023.111785",

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volume = "228",

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T1 - Effects of the electrolytes on the electrochemical behavior of nickel-base superalloys prepared by laser directed energy deposition

AU - Zhang, Yufeng

AU - Yu, Jun

AU - Lin, Xin

AU - Guo, Pengfei

AU - Yan, Qiaodan

AU - Liu, Jianrui

AU - Huang, Weidong

PY - 2024/3

Y1 - 2024/3

N2 - The electrochemical behavior of Inconel 718 prepared by laser directed energy deposition with single γ-phase and dual (γ + γ″)-phase was investigated using 10 wt% NaNO3, 5 wt% NaNO3 + 5 wt% NaCl and 10 wt% NaCl, respectively. It is found that the Cl- ion weakens the inhibitive effect of the transpassive film, resulting in a uniform electrochemical dissolution for deposits with the single γ-phase, but an inferior surface quality for deposits with the dual (γ + γ″) phases due to the γ″ phase inducing uneven pits expansion. Two qualitative models are proposed to demonstrate their electrochemical dissolution mechanism.

AB - The electrochemical behavior of Inconel 718 prepared by laser directed energy deposition with single γ-phase and dual (γ + γ″)-phase was investigated using 10 wt% NaNO3, 5 wt% NaNO3 + 5 wt% NaCl and 10 wt% NaCl, respectively. It is found that the Cl- ion weakens the inhibitive effect of the transpassive film, resulting in a uniform electrochemical dissolution for deposits with the single γ-phase, but an inferior surface quality for deposits with the dual (γ + γ″) phases due to the γ″ phase inducing uneven pits expansion. Two qualitative models are proposed to demonstrate their electrochemical dissolution mechanism.

KW - Additive manufacturing

KW - Electrochemical dissolution

KW - Electrolytes

KW - Inconel 718

KW - Laser directed energy deposition

KW - Transpassive film

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U2 - 10.1016/j.corsci.2023.111785

DO - 10.1016/j.corsci.2023.111785

M3 - 文章

AN - SCOPUS:85181820346

SN - 0010-938X

VL - 228

JO - Corrosion Science

JF - Corrosion Science

M1 - 111785

ER -

Effects of the electrolytes on the electrochemical behavior of nickel-base superalloys prepared by laser directed energy deposition

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