Anode current effects in plasma electrolytic oxidation

Wei, Caihong; Tian, Xiubo; Yang, Shengnan; Wang, X.B.; Fu, Ricky K.Y.; Chu, Paul K.

doi:10.1016/j.surfcoat.2006.07.103

Cited by 63 publications

(33 citation statements)

References 4 publications

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“…The processes are used in different fields of applied electrolysis, namely, in plasma heat treatment, melt ing, welding, cleaning, etching, and polishing, as well as in plating coatings (plasma electrolytic deposition, PED) [21][22][23]. PED involves a number of processes, namely, plasma electrolytic oxidation [21] and plasma electrolytic saturation (PES), including plasma electrolytic carbonization (PEC) [24], etc.…”

Section: Technique Of Electrolytic Processesmentioning

confidence: 99%

Electrolytic plasma processing for plating coatings and treating metals and alloys

Pogrebnyak

Kaverina

Кылышканов

2014

Prot Met Phys Chem Surf

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Abstract-A review of the methods of electrochemical treatment classified as plasma electrolysis is given. Special attention is paid to the physicochemical processes that proceed in electrolytes and the techniques of surface modification and application of protective coatings. The results of investigation of such coatings and surfaces upon electrolytic plasma processing illustrate the efficiency and effectiveness of the method. Being an efficient technique of the surface treatment, which involves both the surface cleaning and plating the coat ing, the plasma electrolytic method is being rapidly developed and adapted for commercial use at present.

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Section: Technique Of Electrolytic Processesmentioning

confidence: 99%

Electrolytic plasma processing for plating coatings and treating metals and alloys

Pogrebnyak

Kaverina

Кылышканов

2014

Prot Met Phys Chem Surf

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“…Wei et al [26]. The PEO processes were carried out on 2024 Al alloy in the electrolyte of sodium silicate with other additives, keeping the anode and cathode plates located face to face and separated by different distances.…”

Section: Influence Of Electrical Parametersmentioning

confidence: 99%

Plasma Electrolytic Oxidation Coatings on Lightweight Metals

Li¹,

Liang²,

Wang³

2013

Modern Surface Engineering Treatments

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“…Although it is the intermediate dense layer that can provide good mechanical properties (eg wear) and corrosion protection, it is the inner dense layer that ultimately provides the best corrosion performance [5][6][7][8][9]. Many processing parameters can affect the PEO process, including electrolyte concentration and composition [10], substrate material [11], and electrical (b) (a) parameters, mainly current mode and current density [8,12]. Different current modes have been utilized in the PEO treatment including, DC, AC, unipolar, bipolar and hybrid (combination of bipolar and unipolar) current modes [13] which play important roles in the consequent voltage breakdown and discharge events, both in terms of discharge intensity and density, local melting and oxidation of the substrate, quenching and re-crystallization processes.…”

Section: Introductionmentioning

confidence: 99%

Production of high quality coatings on light alloys using Plasma Electrolytic Oxidation (PEO)

Hussein

Nie

Northwood

2016

WIT Transactions on the Built Environment

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Plasma Electrolytic Oxidation (PEO) is a high voltage plasma-assisted oxidation process which involves the creation of plasma discharges around a metal surface component immersed in an environmentally-friendly aqueous electrolyte to form ceramic oxide coatings which can, if correctly formed, impart a high corrosion and wear resistance. During PEO coating, there are three simultaneous processes taking place, namely the electrochemical reactions, the plasma chemical reactions and thermal oxygen diffusion. All PEO-coatings have a three-layer structure with a porous outer layer, and intermediate dense layer and a thin inner dense layer. It is through control of the relative amounts (thickness) and composition of these three that high quality coatings can be obtained. In this paper we describe how processing parameters including current density, current mode (unipolar, bipolar, hybrid), and electrolyte (concentration and composition) effect the quality of the coatings as measured by the corrosion and wear resistance. In general terms, an intermediate current density and a bipolar current mode lead to the most compact and high quality coatings, although the growth rate is reduced compared to using a unipolar current mode and higher current densities. The growth rate can be increased by increasing the electrolyte concentration. Incorporation of silicates and aluminates into the electrolyte can result in the formation of hard spinels in the coatings, which can then lead to better wear and corrosion resistance.

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Anode current effects in plasma electrolytic oxidation

Cited by 63 publications

References 4 publications

Electrolytic plasma processing for plating coatings and treating metals and alloys

Electrolytic plasma processing for plating coatings and treating metals and alloys

Plasma Electrolytic Oxidation Coatings on Lightweight Metals

Production of high quality coatings on light alloys using Plasma Electrolytic Oxidation (PEO)

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