溶解
介电谱
材料科学
电化学
电化学加工
氧化物
表面粗糙度
极化(电化学)
氢氧化物
电解质
电流密度
化学工程
无机化学
冶金
电极
化学
复合材料
物理化学
物理
量子力学
工程类
作者
Lu Wang,Xiaoyun Hu,Hansong Li,Jinhao Wang
出处
期刊:International Journal of Electrochemical Science
[ESG]
日期:2024-01-01
卷期号:19 (1): 100421-100421
标识
DOI:10.1016/j.ijoes.2023.100421
摘要
The electrochemical dissolution properties of Hastelloy X are of great significance to its electrochemical machining (ECM). This study focuses on the electrochemical dissolution properties of Hastelloy X in NaCl and NaNO3 solutions. The open circuit potential, polarization curve, electrochemical impedance spectroscopy (EIS) and current efficiency were investigated, and the dissolution mechanisms were revealed. The results revealed that the breakdown potential and electrochemical impedance in NaCl solution were smaller than that in NaNO3 solution, confirming that oxide film was broken more easily in NaCl solution. Local pits and many electrochemical products were observed on the surface, which were formed by electrochemical dissolution, and the main composition of products was the hydroxide and oxide. With the increase of current densities, the current efficiency increased in NaCl solution, while decreased in NaNO3 solution. The current efficiency values and surface roughness demonstrated that at high current density, the rate of electrochemical dissolution was higher in NaCl solution, but better surface quality can be obtained in NaNO3 solution. The research can provide valuable theoretical guidance for the ECM of aerospace parts related to Hastelloy X.
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