Experimental study on the preparation of superalloy Inconel718 heat exchanger channels by electrochemical etching method

被引：0

作者：

Zhang, Lianjie ^{[1
]}

Wang, Jinghan ^{[1
,2
]}

Li, Wei ^{[3
]}

Yang, Ping ^{[1
]}

Ma, Ting ^{[1
]}

Zeng, Min ^{[1
]}

Wang, Qiuwang ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Key Lab Thermo Fluid Sci & Engn, Minist Educ, Xian 710049, Shaanxi, Peoples R China

[2] Imperial Coll London, Dept Chem Engn, Clean Energy Proc CEP Lab, London SW7 2AZ, England

[3] Nanjing Tech Univ, Sch Mech & Power Engn, Jiangsu Key Lab Proc Enhancement & New Energy Equi, Nanjing 211816, Peoples R China

来源：

THERMAL SCIENCE AND ENGINEERING PROGRESS | 2024年 / 53卷

关键词：

Heat exchanger channel; Inconel718; Electrochemical etching; Ultrasonic enhancing; Surface roughness; BEHAVIOR;

D O I：

10.1016/j.tsep.2024.102719

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The nuclear energy field requires the construction of heat exchangers that can withstand sufficiently high temperatures. In this paper, the etching technique was utilized to fabricate heat exchange channels on Inconel718 plates, and experiments were carried out in NaCl-ethylene glycol solution, three temperature conditions of 35 degrees C, 40 degrees C, and 45 degrees C, and two concentrations of electrolyte solutions, 0.5 mol/L and 1 mol/L, with the addition of 50 kHz ultrasound for comparison. The experimental results show that the etching rate can be as high as 2.894 mm/h, and the inter-electrode current is as high as 908 mA. The roughness characterization of the etching channel Ra and Rq measured by the aspheric surface measuring instrument can be as low as 2.416 mu m and 2.647 mu m, respectively. In the images generated by SEM scanning, it is found that uneven distribution of pits and bumps exist in the etching channel, but their diameters are all less than 0.1 mu m, which means the etched channel is acceptably smooth.

引用

页数：10

共 46 条

[1] Highly efficient smoothing of Inconel 718 via electrochemical-based isotropic etching polishing [J].