scholarly journals The effect of process current parameters on the properties of oxide layers under plasma electrolytic oxidation of AMg6 alloy

2021 ◽  
Vol 2144 (1) ◽  
pp. 012018
Author(s):  
A V Polunin ◽  
A G Denisova ◽  
A O Cheretaeva ◽  
M R Shafeev ◽  
E D Borgardt ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Corrosion Resistance ◽  
Plasma Electrolytic Oxidation ◽  
Oxide Layers ◽  
Positive Pulse ◽  
Pulse Ratio ◽  
Wear And Corrosion ◽  
Electrolytic Oxidation ◽  
Wear And Corrosion Resistance ◽  
Plasma Electrolytic

Abstract The effect of current density and current ratio in the cathodic and anodic half-cycles during prolonged (180 minutes) plasma electrolytic oxidation (PEO) of AMg6 wrought alloy on the oxide layer wear and corrosion resistance were studied. It was established that the best wear resistance is achieved in the oxide layers obtained in the “soft sparking” mode (negative-to-positive pulse ratios of 1.15–1.30) at current densities of 9–15 A dm−2, and the best set of wear resistance and corrosion resistance – in the oxide layers obtained in “symmetrical” mode (negative-to-positive pulse ratio of 1.00).

Simultaneous Reduction of Wear and Corrosion of Titanium, Magnesium and Zirconium Alloys by Surface Plasma Electrolytic Oxidation Treatment

2008 ◽  
Vol 38 ◽  
pp. 27-35 ◽  
Author(s):  
H.M. Nykyforchyn ◽  
V.S. Agarwala ◽  
M.D. Klapkiv ◽  
V.M. Posuvailo
Keyword(s):  
Corrosion Resistance ◽  
Plasma Electrolytic Oxidation ◽  
Synthesis Method ◽  
Zirconium Alloys ◽  
Ceramic Coatings ◽  
Oxide Ceramic ◽  
Wear And Corrosion ◽  
Electrolytic Oxidation ◽  
Wear And Corrosion Resistance ◽  
Plasma Electrolytic

Titanium, magnesium and zirconium alloys are widely used in industrial applications, which require high wear and corrosion resistance. However current methods of improving these properties often do not satisfy the requirements of service and functional properties. An alternative approach is the application of oxide-ceramic coatings using high temperature process. The coatings are applied by spark discharge plasma in the metal-electrolyte system at high voltages - PEO (plasma electrolytic oxidation) as an oxide synthesis method. This method has shown good results for aluminium alloys and with good prospects to be used for titanium, magnesium and zirconium alloys. Development of PEO technology to improve the wear and corrosion resistance of titanium, magnesium and zirconium alloys is discussed in this paper. It describes the methods for obtaining the required layer-thickness for a specified hardness, porosity, wear and corrosion resistance, sets up the optimal process parameters (voltage/current) by taking the relation of anodic to cathodic currents into account, and establishing the electrolyte content of different dopants.

scholarly journals Effect of TiN particles on mechanical and anticorrosive properties of oxide layers formed by PEO on silumin

2021 ◽  
Vol 2144 (1) ◽  
pp. 012009
Author(s):  
E D Borgardt ◽  
A V Katsman ◽  
M M Krishtal
Keyword(s):  
Adverse Effect ◽  
Wear Resistance ◽  
Titanium Nitride ◽  
Oxide Layer ◽  
Plasma Electrolytic Oxidation ◽  
Oxide Layers ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic ◽  
Positive Effect

Abstract The work focuses on the effect of sub-micron and micron dispersity titanium nitride additions to the electrolyte during plasma electrolytic oxidation (PEO) of silumin A14130(11.5 wt% Si) on the structure, mechanical and anticorrosive properties of the oxide layers. It was found that the greatest positive effect of sub-micron TiN particles on the hardness and wear resistance of oxide layers is achieved at concentrations in the range of 1.0–2.5 g/l, and for micron TiN particles – at 0.5–1.0 g/l concentrations. However, for all concentrations of TiN particles, their insertion into the oxide layer has adverse effect on the anticorrosive properties of the oxide layer.

Corrosion resistance of oxide layers formed on AZ91 Mg alloy in KMnO4 electrolyte by plasma electrolytic oxidation

2009 ◽  
Vol 54 (23) ◽  
pp. 5479-5485 ◽  
Author(s):  
Duck Young Hwang ◽  
Yong Min Kim ◽  
Deok-Yong Park ◽  
Bongyoung Yoo ◽  
Dong Hyuk Shin
Keyword(s):  
Corrosion Resistance ◽  
Plasma Electrolytic Oxidation ◽  
Mg Alloy ◽  
Oxide Layers ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic
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