Plasma Electrolytic Oxidation/Cerium Conversion Composite Coatings for the Improved Corrosion Protection of AZ31 Mg Alloys

2012 ◽  
Vol 160 (2) ◽  
pp. C77-C82 ◽  
Author(s):  
Tae Seop Lim ◽  
Hyun Sam Ryu ◽  
Seong-Hyeon Hong
Keyword(s):  
Corrosion Protection ◽  
Plasma Electrolytic Oxidation ◽  
Composite Coatings ◽  
Mg Alloys ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

scholarly journals Atmospheric and Marine Corrosion of PEO and Composite Coatings Obtained on Al-Cu-Mg Aluminum Alloy

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2739 ◽  
Author(s):  
Vladimir S. Egorkin ◽  
Ivan M. Medvedev ◽  
Sergey L. Sinebryukhov ◽  
Igor E. Vyaliy ◽  
Andrey S. Gnedenkov ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Composite Coating ◽  
Corrosion Protection ◽  
Plasma Electrolytic Oxidation ◽  
Composite Coatings ◽  
Marine Corrosion ◽  
X Ray ◽  
Electrolytic Oxidation ◽  
Natural Oxide ◽  
Plasma Electrolytic

Wrought Al-Cu-Mg aluminum alloy (D16) was treated by bipolar plasma electrolytic oxidation to create a base plasma electrolytic oxidation (PEO)-coating with corrosion protection and mechanical properties superior to bare alloy’s natural oxide layer. Additional protection was provided by the application of polymer, thus creating a composite coating. Electrochemical and scratch tests, scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction studies were performed. Degradation of coatings in the marine atmosphere and seawater was evaluated. The composite polymer-containing coating provided better corrosion protection of aluminum alloy compared to the PEO-coating, although seawater affected both. During the atmospheric exposure, the PEO-coating provided reasonably good protection, and the composite coating showed excellent performance.

Inhibitor-Containing Composite Coatings on Mg Alloys: Corrosion Mechanism and Self-Healing Protection

2015 ◽  
Vol 245 ◽  
pp. 89-96 ◽  
Author(s):  
Andrey S. Gnedenkov ◽  
Sergey L. Sinebryukhov ◽  
Dmitry V. Mashtalyar ◽  
Sergey V. Gnedenkov
Keyword(s):  
Plasma Electrolytic Oxidation ◽  
Composite Coatings ◽  
Healing Process ◽  
Corrosion Mechanism ◽  
Self Healing ◽  
Protective Properties ◽  
Oxidation Method ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic ◽  
Electrode Technique

The way of self-healing coating formation at the surface of magnesium alloys by means of plasma electrolytic oxidation method (PEO) with subsequent filling of the obtained layer with inhibitor has been suggested. The electrochemical properties of such coatings have been described in details. The obtained experimental results indicate that the protective properties of the samples with inhibitor-containing coating were increased (IC = 8.6×10–8 A/cm2) in comparison with the samples without coating (5.3×10–5 A/cm2) and the base coating obtained by plasma electrolytic oxidation method (PEO) (3.4×10–7 A/cm2). The local scanning electrochemical methods of surface investigation, notably Scanning Vibrating Electrode Technique (SVET) and Scanning Ion-Selective Electrode Technique (SIET) were used for determining the kinetics and mechanism of the self-healing process. The treatment by the solution containing 8-hydroxyquinoline, which inhibits the corrosion process, enables one to increase the protective properties of the composite coating in 30 times in the corrosion-active environment in comparison with the base PEO-coating and avert the intensive destruction of the material.

Composite coatings formed using plasma electrolytic oxidation and fluoroparaffin materials

2018 ◽  
Vol 767 ◽  
pp. 353-360 ◽  
Author(s):  
D.V. Mashtalyar ◽  
S.V. Gnedenkov ◽  
S.L. Sinebryukhov ◽  
I.M. Imshinetskiy ◽  
A.S. Gnedenkov ◽  
...  
Keyword(s):  
Plasma Electrolytic Oxidation ◽  
Composite Coatings ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic
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