| LIU Weidong,LIU Shaobo,WANG Zhiping,ZHAO Yonghua.Investigation of Jet Electrolytic Plasma Process for Removing Carbon Deposits on Metal Surfaces[J],54(10):173-184 |
| Investigation of Jet Electrolytic Plasma Process for Removing Carbon Deposits on Metal Surfaces |
| Received:September 19, 2024 Revised:November 14, 2024 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2025.10.014 |
| KeyWord:carbon deposits surface cleaning electrolyte jet electrolytic plasma process principles |
| Author | Institution |
| LIU Weidong |
College of Aeronautical Engineering, Civil Aviation University of China, Tianjin , China |
| LIU Shaobo |
College of Aeronautical Engineering, Civil Aviation University of China, Tianjin , China |
| WANG Zhiping |
College of Aeronautical Engineering, Civil Aviation University of China, Tianjin , China |
| ZHAO Yonghua |
Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Guangdong Shenzhen , China |
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| Abstract: |
| To address the challenge of high-quality removal of carbon deposits on metal surfaces, this study proposes a novel jet electrolytic plasma removal method and establishes the process characteristics of jet electrolytic plasma removal of carbon deposits. The effects of various parameters, including voltage, electrolyte flow rate, electrode gap, and electrolyte temperature, on the induced state of the jet electrolytic plasma are studied based on the observation of current waveforms and the discharge state of the jet. Accordingly, the boundary conditions necessary for igniting jet electrolytic plasma can be determined and established. The cross-sectional profile and surface morphology of the areas that are affected by the jet electrolytic plasma are characterized with a profilometer and a scanning electron microscope (SEM). As such, the process parameters effects on the dimensional loss and surface damage of substrate materials are studied. Additionally, ImageJ software is employed to analyze the carbon deposits removal rate achieved by jet electrolytic plasma, which further helps in exploring how different process parameters can impact the efficiency of carbon deposits removal rates. According to the experimental results, the stable excitation of the jet electrolytic plasma benefits from the increase in the voltage and electrolyte temperature, and the decrease in the electrolyte flow rate and electrode gap. Through the regulation of process parameters, two distinct states are observed in the jet electrolytic plasma. These are, respectively, the discrete plasma state and the continuous plasma state. The differences in dimensional loss and surface damage of substrate materials are caused by the effects of jet electrolytic plasma in different states. Increasing the voltage, reducing the flow rate, and decreasing the electrode gap are favorable for enhancing the thermal and chemical effects of the jet electrolytic plasma and reducing the dimensional loss of substrate materials. However, this results in an increase in the surface roughness of the substrate material. Conversely, decreasing the voltage, increasing the flow rate, and increasing the electrode gap will enhance the electrochemical dissolution effect of the jet electrolytic plasma and result in dimensional loss of the substrate material. However, it is conducive to the formation of low-damage surfaces. The key parameters affecting the carbon deposits removal rate in jet electrolytic plasma are voltage and electrode gap. Increasing the voltage and reducing the electrode gap can effectively improve the carbon deposits removal rate. However, the carbon deposits removal rate is less affected by changes of the electrolyte flow rate. Under the optimum process parameters of voltage 600 V, electrolyte flow rate 225 mL/min, electrode gap 6 mm and electrolyte temperature 90 ℃, the removal rate of carbon deposits on the metal surface is close to 100% and the removal rate is close to 1 cm2/min. In summary, according to the experimental results observed, Jet electrolytic plasma technology can remove carbon deposits on metal surfaces with high efficiency, thoroughness and flexibility while ensuring low damage to the substrate material. |
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