Corrosion-resistant plasma electrolytic oxidation coating modified by Zinc phosphate and self-healing mechanism in the salt-spray environment

2020 ◽  
Vol 384 ◽  
pp. 125321 ◽  
Author(s):  
Qian Huang ◽  
Liangliang Liu ◽  
Zhongzhen Wu ◽  
Shunping Ji ◽  
Hao Wu ◽  
...  
Keyword(s):  
Plasma Electrolytic Oxidation ◽  
Zinc Phosphate ◽  
Salt Spray ◽  
Self Healing ◽  
Corrosion Resistant ◽  
Plasma Electrolytic Oxidation Coating ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

Development of Black Corrosion-Resistant Ceramic Oxide Coatings on AA7075 by Plasma Electrolytic Oxidation

2018 ◽  
Vol 72 (1) ◽  
pp. 47-53 ◽  
Author(s):  
Ramesh Babu Nagumothu ◽  
Arunnellaiappan Thangavelu ◽  
Arun Mohan Nair ◽  
Arun Sukumaran ◽  
Tomson Anjilivelil
Keyword(s):  
Plasma Electrolytic Oxidation ◽  
Oxide Coatings ◽  
Corrosion Resistant ◽  
Ceramic Oxide ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic ◽  
Resistant Ceramic

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.

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