Electrolyte optimisation for effective plasma electrolytic polishing of brass

Navickaitė, Kristina; Böttger, Toni; Nestler, Klaus; Penzel, Michael; Schröder, Sam; Stepputat, Vincent N.; Böttger‐Hiller, Falko; Zeidler, Henning

doi:10.1016/j.rsurfi.2023.100133

Cited by 1 publication

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“…A variety of electrically conductive materials have been successfully polished, namely, a variety of steels [ 15 ], copper alloys [ 14 , 16 , 17 ] including metallic glass [ 18 ], aluminium alloys [ 19 ], and other materials such as cobalt–chromium alloy [ 20 ], titanium alloy [ 21 ], nitinol [ 22 ], etc. Regardless of which material is to be polished, the current peak and the power that occur during the initialisation phase of the process must be taken into account.…”

Section: Introductionmentioning

confidence: 99%

Influence of Anode Immersion Speed on Current and Power in Plasma Electrolytic Polishing

Valentinčič,

Zeidler,

Böttger

et al. 2024

Micromachines

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Plasma electrolytic polishing (PeP) is mainly used to improve the surface quality and thus the performance of electrically conductive parts. It is usually used as an anodic process, i.e., the workpiece is positively charged. However, the process is susceptible to high current peaks during the formation of the vapour–gaseous envelope, especially when polishing workpieces with a large surface area. In this study, the influence of the anode immersion speed on the current peaks and the average power during the initialisation of the PeP process is investigated for an anode the size of a microreactor mould insert. Through systematic experimentation and analysis, this work provides insights into the control of the initialisation process by modulating the anode immersion speed. The results clarify the relationship between immersion speed, peak current, and average power and provide a novel approach to improve process efficiency in PeP. The highest peak current and average power occur when the electrolyte splashes over the top of the anode and not, as expected, when the anode touches the electrolyte. By immersion of the anode while the voltage is applied to the anode and counterelectrode, the reduction of both parameters is over 80%.

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