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

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5 引用 (Scopus)

摘要

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.

源语言英语
文章编号111785
期刊Corrosion Science
228
DOI
出版状态已出版 - 3月 2024

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