钝化
材料科学
介电谱
电解质
合金
线性扫描伏安法
微观结构
X射线光电子能谱
循环伏安法
电化学加工
溶解
腐蚀
冶金
化学工程
电化学
复合材料
图层(电子)
电极
化学
物理化学
工程类
作者
Q.D. Wang,Ningsong Qu,Jiajie Chen
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2024-06-03
卷期号:171 (6): 062506-062506
被引量:1
标识
DOI:10.1149/1945-7111/ad576c
摘要
Because to its exceptional performance, 2219 aluminum alloy is extensively employed in the aerospace sector for large thin-wall structures. However, the machining of such structures commonly results in issues like chatter and deformation, making electrochemical machining (ECM) the preferred method. The primary focus of ECM for anode materials involves understanding their behavior during the electrochemical dissolution process. The anode electrochemical behavior of 2219 aluminum alloy in 10 wt% NaNO 3 electrolyte and 10 wt% NaCl electrolyte is reported for the first time. Passivation-related characteristics and interface structures were assessed through linear sweep voltammetry, cyclic voltammetry, and electrochemical impedance spectroscopy curves. The growth and composition of passivated films were determined through open-cricuit potential and X-ray photoelectron spectroscopy analyses. Results indicate that in NaNO 3 electrolyte, a thicker and more stable passivation film forms, enhancing corrosion resistance and inhibiting material dissolution. ECM tests reveal pitting in 2219 aluminum alloy under low current density, with the oxide layer breaking at higher densities. Notably, ECM of 2219 aluminum alloy with NaNO 3 electrolyte yields superior surface morphology, evident in both microstructure and macro-morphology.
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