Optimization of plasma electrolyte oxidation process parameters for corrosion resistance of Mg alloy

The formation of titanium oxide coatings on Ti–6Al–4 V substrates by plasma electrolyte oxidation and the corrosion behavior of coatings in simulated body fluid were investigated. The effect of the addition of nano-hydroxyapatite particles to electrolyte and duty cycle of plasma electrolyte oxidation on the coating thickness and its surface morphology was studied. Phase structure and morphology of coated parts were studied using X-ray diffraction patterns and scanning electron microscopy. Wear and corrosion resistance were compared in coated and uncoated samples. Biocompatibility of coating was investigated using in vitro immersion in simulated body fluid. It was found that the plasma electrolyte oxidation forms dense and compact oxide coatings with slightly porous outer layers. Formation of apatite phase on the surface of coated samples was examined after immersion in simulated body fluid for two weeks. The corrosion resistance of plasma electrolyte oxidation coatings formed in electrolyte with high concentration of nano-hydroxyapatite and high duty cycle (60%) is better than the corrosion resistance of plasma electrolyte oxidation coatings formed in other electrolytes. Energy-dispersive spectroscopy results indicate the formation of a complete and preservative coating on Ti base materials.

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Synergistic influence of inorganic oxides (ZrO2 and SiO2) with N2H4 to protect composite coatings obtained via plasma electrolyte oxidation on Mg alloy

Physical Chemistry Chemical Physics ◽

10.1039/c6cp07135j ◽

2017 ◽

Vol 19 (3) ◽

pp. 2372-2382 ◽

Cited By ~ 25

Author(s):

Wail Al Zoubi ◽

Muhammad Prisla Kamil ◽

Young Gun Ko

Keyword(s):

Composite Coatings ◽

Mg Alloy ◽

Inorganic Oxides ◽

Plasma Electrolyte ◽

Coating Layers ◽

Plasma Electrolyte Oxidation ◽

Functionalized Coatings ◽

Electrolyte Oxidation

The addition of nanoparticles to the coating layers provided an electrochemical pathway to generate functionalized coatings.

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The Characteristic in Mg Alloy with Burning and Plasma Electrolyte Oxidation Surface Treatment

Applied Science and Convergence Technology ◽

10.5757/jkvs.2010.19.5.326 ◽

2010 ◽

Vol 19 (5) ◽

pp. 326-330

Author(s):

Jae-In Yu ◽

Soon-Don Choi ◽

Ho-Kyeoung Jang

Keyword(s):

Surface Treatment ◽

Mg Alloy ◽

Plasma Electrolyte ◽

Plasma Electrolyte Oxidation ◽

Oxidation Surface ◽

Electrolyte Oxidation

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Microstructural, corrosion and mechanical behavior of two-step plasma electrolyte oxidation ceramic coatings

Transactions of Nonferrous Metals Society of China ◽

10.1016/s1003-6326(17)60248-6 ◽

2017 ◽

Vol 27 (10) ◽

pp. 2225-2233 ◽

Cited By ~ 5

Author(s):

H. KHANMOHAMMADI ◽

S.R. ALLAHKARAM ◽

N. TOWHIDI

Keyword(s):

Mechanical Behavior ◽

Ceramic Coatings ◽

Plasma Electrolyte ◽

Plasma Electrolyte Oxidation ◽

Electrolyte Oxidation

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Corrosion and Wear Behavior of PEO Coatings on D16T Aluminum Alloy with Different Concentrations of Graphene

Coatings ◽

10.3390/coatings10030249 ◽

2020 ◽

Vol 10 (3) ◽

pp. 249

Author(s):

Wanying Liu ◽

Yi Pu ◽

Hongcheng Liao ◽

Yuanhua Lin ◽

Wanying He

Keyword(s):

Wear Resistance ◽

Corrosion Resistance ◽

Aluminum Alloy ◽

Wear Behavior ◽

Corrosion And Wear ◽

Plasma Electrolyte ◽

Comprehensive Properties ◽

Α Al2o3 ◽

Plasma Electrolyte Oxidation ◽

Peo Coatings

The effect of added graphene concentration on the microstructure, phase composition, corrosion- and wear- resistance of plasma electrolyte oxidation (PEO) coatings formed on D16T aluminum alloy in silicate electrolyte with different concentrations of graphene were investigated. The results show that the morphologies of the coatings with graphene were obviously different ascribed to the mode of graphene incorporated into the coating. The coatings consisted of mainly α-Al2O3, γ-Al2O3, and Al, which were divided into an outer porous layer and a dense inner layer. The thickness of the coatings increased non-linearly with graphene concentration. The corrosion resistance of the coatings with graphene was significantly improved. The wear resistance of the coatings was also greatly improved apart from the coating with 3 g/L graphene. The coating produced in the electrolyte with 2 g/L graphene exhibited the optimal comprehensive properties because graphene successfully incorporated into the coating via the pores and spread on the surface of the coating.

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