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Article

Surface Modification of Aluminum 6061-O Alloy by Plasma Electrolytic Oxidation to Improve Corrosion Resistance Properties

The Center for Design, Manufacturing and Materials, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, bld. 1, 121205 Moscow, Russia
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Coatings 2021, 11(1), 4; https://doi.org/10.3390/coatings11010004
Received: 25 November 2020 / Revised: 14 December 2020 / Accepted: 16 December 2020 / Published: 22 December 2020
(This article belongs to the Section Corrosion, Wear and Erosion)
In the present investigation, the plasma electrolytic oxidation (PEO) process was employed to form aluminum oxide coating layers to enhance corrosion resistance properties of high-strength aluminum alloys. The formed protective coating layers were examined by means of scanning electron microscopy (SEM) and characterized by several electrochemical techniques, including open circuit potential (OCP), linear potentiodynamic polarization (LP) and electrochemical impedance spectroscopy (EIS). The results were reported in comparison with the bare 6061-O aluminum alloy to determine the corrosion performance of the coated 6061-O alloy. The PEO-treated aluminum alloy showed substantially higher corrosion resistance in comparison with the untreated substrate material. A relationship was found between the coating formation stage, process parameters and the thickness of the oxide-formed layers, which has a measurable influence on enhancing corrosion resistance properties. This study demonstrates promising results of utilizing PEO process to enhance corrosion resistance properties of high-strength aluminum alloys and could be recommended as a method used in industrial applications. View Full-Text
Keywords: coatings; corrosion; plasma electrolytic oxidation; electrochemical characterization coatings; corrosion; plasma electrolytic oxidation; electrochemical characterization
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MDPI and ACS Style

Dzhurinskiy, D.V.; Dautov, S.S.; Shornikov, P.G.; Akhatov, I.S. Surface Modification of Aluminum 6061-O Alloy by Plasma Electrolytic Oxidation to Improve Corrosion Resistance Properties. Coatings 2021, 11, 4. https://doi.org/10.3390/coatings11010004

AMA Style

Dzhurinskiy DV, Dautov SS, Shornikov PG, Akhatov IS. Surface Modification of Aluminum 6061-O Alloy by Plasma Electrolytic Oxidation to Improve Corrosion Resistance Properties. Coatings. 2021; 11(1):4. https://doi.org/10.3390/coatings11010004

Chicago/Turabian Style

Dzhurinskiy, Dmitry V., Stanislav S. Dautov, Petr G. Shornikov, and Iskander S. Akhatov 2021. "Surface Modification of Aluminum 6061-O Alloy by Plasma Electrolytic Oxidation to Improve Corrosion Resistance Properties" Coatings 11, no. 1: 4. https://doi.org/10.3390/coatings11010004

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