Incorporation of Composite Zirconia-Silica Nanoparticles into PEO-Coatings on Magnesium Alloys

2018 ◽  
Vol 386 ◽  
pp. 321-325
Author(s):  
Igor M. Imshinetsky ◽  
Sergey V. Gnedenkov ◽  
Sergey L. Sinebryukhov ◽  
Dmitry V. Mashtalyar ◽  
Andrew V. Samokhin ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Silica Nanoparticles ◽  
Magnesium Alloys ◽  
Plasma Electrolytic Oxidation ◽  
Protective Coatings ◽  
Surface Layers ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic ◽  
Peo Coatings ◽  
The Way

The way of protective coatings formation on MA8 magnesium alloy by plasma electrolytic oxidation (PEO) in the electrolyte containing composite zirconia-silica nanoparticles has been developed. It is shown that the coatings, which contain nanoparticles, have a significant advantage in comparison with the surface layers obtained without their use.

Incorporation of TiO2(B) Nanoparticles into PEO Coatings on MA8 Magnesium Alloy

2020 ◽  
Vol 312 ◽  
pp. 372-376
Author(s):  
Igor M. Imshinetsky ◽  
Konstantine V. Nadaraia ◽  
Alexander A. Sokolov ◽  
Sergey N. Suchkov ◽  
Arina I. Pleshkova ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Adhesive Strength ◽  
Plasma Electrolytic Oxidation ◽  
Protective Coatings ◽  
Surface Layers ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic ◽  
Peo Coatings ◽  
The Way

The way of protective coatings formation on MA8 magnesium alloy by plasma electrolytic oxidation (PEO) in the electrolyte containing TiO2(B) nanoparticles has been developed. It is shown that the coatings, which contain nanoparticles, have a significant advantage in microhardenss and adhesive strength in comparison with the surface layers obtained without their use.

scholarly journals Formation of PEO Coatings Modified by SiC Nanoparticles on the MA8 Magnesium Alloy

2021 ◽  
Vol 346 ◽  
pp. 02021
Author(s):  
Dmitry V. Mashtalyar ◽  
Igor M. Imshinetskiy ◽  
Konstantine V. Nadaraia ◽  
Marina V. Sidorova ◽  
Sergey L. Sinebryukhov ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Magnesium Alloy ◽  
Adhesive Strength ◽  
Plasma Electrolytic Oxidation ◽  
Surface Layers ◽  
Properties Of Coatings ◽  
Sic Nanoparticles ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic ◽  
Peo Coatings

The properties of coatings formed on the MA8 magnesium alloy by the plasma electrolytic oxidation in electrolytes containing silicon carbide nanoparticles in concentrations of 2, 4 and 6 g/l have been investigated. It has been shown that coatings, which contain nanoparticles, have a significant advantage in microhardenss and adhesive strength in comparison with the surface layers obtained without their use.

Electrophoretic Composite Coatings on Magnesium Alloys

2015 ◽  
Vol 245 ◽  
pp. 97-102
Author(s):  
Dmitry V. Mashtalyar ◽  
Sergey V. Gnedenkov ◽  
Sergey L. Sinebryukhov ◽  
Igor M. Imshinetsky
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Electrophoretic Deposition ◽  
Plasma Electrolytic Oxidation ◽  
Corrosion Current Density ◽  
Composite Coatings ◽  
Corrosion Current ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

Investigation results of the composite coatings obtained on MA8 magnesium alloy by plasma electrolytic oxidation (PEO) and post-treated by electrophoretic deposition of superdispersed polytetrafluoroethylene (SPTFE) are presented. Comprehensive research of electrochemical and mechanical properties of the obtained polymer-containing coatings on the magnesium alloy has been performed. It has been established that composite coatings to decrease the corrosion current density by three orders of magnitude (down to Ic = 2.0×10-10 A/cm2) and the wear by two orders of magnitude (down to 1.2×10-6 mm3/(N·m)), as compared to the basic PEO-coating.

Comparison of Electrochemical and Chemical Corrosion Behavior of MRI 230D Magnesium Alloy with and without Plasma Electrolytic Oxidation Treatment

2015 ◽  
Vol 364 ◽  
pp. 27-34
Author(s):  
Barbara Kazanski ◽  
Alex Lugovskoy ◽  
Ohad Gaon ◽  
Michael Zinigrad
Keyword(s):  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Corrosion Behavior ◽  
Plasma Electrolytic Oxidation ◽  
Electrochemical Impedance ◽  
Weight Ratio ◽  
Open Circuit ◽  
Chemical Corrosion ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

Magnesium is one of the lightest metals and magnesium alloys have quite special properties, interest to which is continuously growing. In particular, their high strength-to-weight ratio makes magnesium alloys attractive for various applications, such as transportation, aerospace industryetc. However, magnesium alloys are still not as popular as aluminum alloys, and a major issue is their corrosion behavior.The present research investigated the influence of the PEO treatment on the corrosion behavior of MRI 230M magnesium alloy. Plasma electrolytic oxidation (PEO) of an MRI 230M alloy was accomplished in a silicate-base electrolyte with KF addition using an AC power source.The corrosion behavior of both treated and untreated samples was evaluated by open circuit potential (OCP) measurements, electrochemical impedance spectroscopy (EIS), linear polarization tests, linear sweep voltammetry (Tafel extrapolation) and chemical methods, such as mass loss and hydrogen evolution, in neutral 3.0 wt% NaCl solution.According to the tests results, PEO process can affect the corrosion resistance of MRI 230M magnesium alloy, though its action is not always unambiguous. An attempt to explain the influence of the PEO treatment on the corrosion behavior of the alloy is presented.

Corrosion Characteristics of PEO Films on AZ31 Magnesium Alloys

2011 ◽  
Vol 189-193 ◽  
pp. 256-259
Author(s):  
Li Wang ◽  
Li Chen ◽  
Wen Fu
Keyword(s):  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Plasma Electrolytic Oxidation ◽  
Silicate Solution ◽  
Az31 Magnesium Alloy ◽  
Nacl Solution ◽  
Pitting Corrosion Resistance ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic ◽  
Az31 Magnesium Alloys

The aim of this work is to discuss the corrosion characteristics of plasma electrolytic oxidation (PEO) films formed on AZ31 magnesium alloys in alkaline silicate solution. The uniform and pitting corrosion resistance of the PEO films was investigated by potentiodynamic polarization tests and potentiodynamic scanning curve tests. The composition, the structure and the element contents of the films after immersed in 3.5 wt.% NaCl solution for different time were investigated by XRD、SEM and EDS. The results indicated that the corrosion occurred on AZ31 magnesium alloy and treated PEO samples during five days immersion, but the corrosion tendency of the PEO treated samples is smaller than that of AZ31 magnesium alloy.

Developments in plasma electrolytic oxidation (PEO) coatings for biodegradable magnesium alloys

2021 ◽  
Author(s):  
Hariprasad Sampatirao ◽  
Shishir Radhakrishnapillai ◽  
Sreekanth Dondapati ◽  
Evgeny Parfenov ◽  
Rameshbabu Nagumothu
Keyword(s):  
Magnesium Alloys ◽  
Plasma Electrolytic Oxidation ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic ◽  
Peo Coatings ◽  
Biodegradable Magnesium

scholarly journals COMPARATIVE ANALYSIS OF IMMUNOLOGICAL COMPATIBILITY OF BIOACTIVE CALCIUM PHOSPHATE COATINGS ON TITANIUM AND MAGNESIUM ALLOYS

2017 ◽  
Vol 60 (2) ◽  
pp. 45
Author(s):  
Tatiana S. Zaporozhets ◽  
Tatiana P. Smolina ◽  
Anna K. Gazha ◽  
Artyom V. Puz ◽  
Sergeiy. L. Sinebryukhov ◽  
...  
Keyword(s):  
Innate Immunity ◽  
Calcium Phosphate ◽  
Magnesium Alloys ◽  
Plasma Electrolytic Oxidation ◽  
Phosphate Coatings ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic ◽  
Peo Coatings ◽  
Calcium Phosphate Coatings ◽  
Physical And Chemical

Current strategies for developing the biomaterials suggest passive modulation of osteoinductive and osteoconductive properties of the implant surface through a change in their physical and chemical parameters. Also, the osseointegration of implant depends on the reaction of the immune system, the severity of which is determined by physical and chemical properties of the material and the morphological features of the coating. In this paper, the plasma electrolytic oxidation (PEO) method for the formation of biologically active compositional corrosion resistant calcium phosphate coatings on titanium BT1-0 and magnesium alloy MA8, designed for bone bioengineering was used. Bioactive PEO coatings were additionally treated with superdispersed polytetrafluoroethylene (SPTFE) in order to improve anti-corrosion properties. The cellular and molecular aspects of immunological compatibility of bioactive calcium phosphate coatings formed on titanium and magnesium alloys by promising technology of plasma electrolytic oxidation and intended for bone tissue bioengineering were studied. It is shown that PEO coatings formed on titanium and magnesium induce an activation of human peripheral blood leukocytes in vitro, associated with increased expression of activation of molecules of CD69, CD38, CD11b on the cell membranes while shedding L-selectin (CD62L). Influence of coating process technologies on the intensity of the activation processes was established. Contact cells with calcium-phosphate PEO coatings formed on titanium and magnesium alloys induced a less pronounced activation in comparison with the untreated implants. The minimal reaction of the cells of the innate immunity was observed at using a composite of PEO coatings with SPTFE, obtained by electrophoretic deposition. The composite coating on magnesium alloys induces response of the cells of the innate immunity, comparable with the response to the coatings on titanium alloys. On the whole, immunological characteristics of the PEO coatings on titanium BT1-0 and magnesium alloy of MA8 demonstrate possibility of development of materials and wares for implant surgery, including bioresorbable alloys on magnesium base. For citation:Zaporozhets T.S., Puz A.V., Sinebryukhov S.L., Gnedenkov S.V., Smolina T.P., Gazha A.K. Comparative analysis of immunological compatibility of bioactive calcium phosphate coatings on titanium and magnesium alloys. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 2. P. 45-51.

Corrosion Mechanism of PEO Films on AZ31 Magnesium Alloys

2012 ◽  
Vol 461 ◽  
pp. 220-223 ◽  
Author(s):  
Li Wang ◽  
Wen Fu ◽  
Li Chen
Keyword(s):  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Plasma Electrolytic Oxidation ◽  
Silicate Solution ◽  
Corrosion Mechanism ◽  
Nacl Solution ◽  
Electrolytic Oxidation ◽  
Corrosion Mechanisms ◽  
Plasma Electrolytic ◽  
Az31 Magnesium Alloys

The corrosion mechanisms of plasma electrolytic oxidation (PEO) films formed on AZ31 magnesium alloys were discussed in alkaline silicate solution. The structure and element contents of the films after immersed in 3.5 wt.% NaCl solution were investigated by SEM and EDS. The results indicated that the corrosion occurred on AZ31 magnesium alloy and the treated PEO samples during five days immersion. The corrosion procedure of the samples was depicted.

scholarly journals Effect of Applied Current Density of Plasma Electrolytic Oxidation Process on Corrosion Resistance of AZ31 Magnesium Alloy

2019 ◽  
Vol 21 (2) ◽  
pp. 32-36 ◽  
Author(s):  
Daniel Kajanek ◽  
Branislav Hadzima ◽  
Matej Brezina ◽  
Martina Jackova
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Current Density ◽  
Plasma Electrolytic Oxidation ◽  
Az31 Magnesium Alloy ◽  
Applied Current ◽  
Applied Current Density ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic ◽  
Peo Coatings

Impact of applied current density during the plasma electrolytic oxidation (PEO) process on corrosion resistance of AZ31 magnesium alloy was studied. The PEO coatings were prepared using four different current densities with values of 0.025 A/cm2, 0.05 A/cm2, 0.1 A/cm2 and 0.15 A/cm2 in electrolyte consisting of 10 g/l Na 3PO4.12H2O and 1 g/l KOH. Morphology and chemical composition of the coatings was examined using the scanning electron microscopy and EDS analysis respectively. Electrochemical characteristics of ground and coated samples were measured by means of electrochemical impedance spectroscopy (EIS) in 0.1M NaCl solution. Obtained data in form of Nyquist diagrams were analysed by equivalent circuit method. Results of experiments showed that value of applied current density had significant effect on protective performance of the PEO coatings prepared on AZ31 magnesium alloy surface.

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