Electric field effect on surface layer removal during electrolytic plasma polishing

Парфенов, Е.В.; Фаррахов, Р. Г.; Mukaeva, V. R.; Gusarov, A.V.; Nev’yantseva, R. R.; Yerokhin, Aleksey

doi:10.1016/j.surfcoat.2016.08.066

Cited by 53 publications

(23 citation statements)

References 18 publications

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“…In contrast to the electro polishing, the electrolytic plasma polishing represents a new method for polishing, cleaning and deburring of metal surfaces [14]. Approaches to process understanding were presented by Landolt [15], Kissling [16], Parfenov [17,18], Yerokhin [19] and Podhorský [5]. Depending on the selected material, roughness Ra of 15 nm can be achieved with the electrolytic plasma polishing [14].…”

Section: Introductionmentioning

confidence: 99%

Electrolytic Plasma Polishing of Pipe Inner Surfaces

Cornelsen

Deutsch

Seitz

2017

Metals

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Smooth surfaces are becoming increasingly important in many industries, such as medical, chemical or food. In some industrial areas, the mechanical treatment of surfaces (grinding and polishing) does not fulfil desired specifications. Non-abrasive methods (chemical and electrochemical) have the advantage that even complex geometries and free-form shapes can be polished. In the context of this paper, electrochemical surface treatment is considered in more detail. Both electro polishing, which is state of the art, and the novel electrolytic plasma polishing (EPP) process are presented. This paper focusses on the electrolytic plasma polishing because it has many advantages compared to the process of electro polishing. The theoretical operation of the electrolytic plasma polishing is shown. A prototype system for plasma polishing of internal surfaces of pipes was installed and a polishing head was developed. Several parameters are investigated, such as the width of the adjustable polishing head gap and different velocities v or different applied potential differences U, and first results of the average surface roughness Sa as function of the various parameters were evaluated. It can be seen that a stable polishing process can be achieved at the highest potential difference of 320 V and that the average surface roughness Sa reaches a range from 0.065 to 0.090 µm. At the same time, it has been shown that with increasing potential difference, the average surface roughness becomes independent of the width of the adjustable polishing head gap.

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Section: Introductionmentioning

confidence: 99%

Electrolytic Plasma Polishing of Pipe Inner Surfaces

Cornelsen

Deutsch

Seitz

2017

Metals

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“…According to the existing literature, common value of average current density range from 0.1 A/cm 2 to 0.5 A/cm 2 [1,2,3,5,7,16,34,40]. Thus, knowing the initial sample area and monitoring the current during processing, the process can be controlled.…”

Section: Inline Metrology In Plasma Electrolytic Polishingmentioning

confidence: 99%

“…Parfenov et al [34] have studied the current efficiency of the PeP and electrolysis processes. It was concluded that PeP is mainly an electrochemical process, with a current efficiency of about 30%.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

“…These discharges do not cause melting or the removal of the workpiece surface. Based on data obtained from a comparison of PeP and electrolysis by Parfenov et al [34], it can be concluded that the appearance of a plasma-gas layer leads to changes in some electrochemical reactions. By traditional electrolysis, the formation of oxygen can be observed on the anode surface.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

“…By traditional electrolysis, the formation of oxygen can be observed on the anode surface. Electrochemical machining (ECM) with the same current density as in PeP process has a current efficiency of about 9% [34]. The low current efficiency of the ECM process can be explained by the passivation of the workpiece surface by oxygen.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

See 2 more Smart Citations

Process Understanding of Plasma Electrolytic Polishing through Multiphysics Simulation and Inline Metrology

et al. 2019

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Currently, the demand for surface treatment methods like plasma electrolytic polishing (PeP)—a special case of electrochemical machining—is increasing. This paper provides a literature review on the fundamental mechanisms of the plasma electrolytic polishing process and discusses simulated and experimental results. The simulation shows and describes a modelling approach of the polishing effect during the PeP process. Based on the simulation results, it can be assumed that PeP can be simulated as an electrochemical machining process and that the simulation can be used for roughness and processing time predictions. The simulation results exhibit correlations with the experimentally-achieved approximation for roughness decrease. The experimental part demonstrates the results of the PeP processing for different times. The results for different types of roughness show that roughness decreases exponentially. Additionally, a current efficiency calculation was made. Based on the experimental results, it can be assumed that PeP is a special electrochemical machining process with low passivation.

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