等离子体电解氧化
腐蚀
材料科学
介电谱
合金
涂层
扫描电子显微镜
铝
氧化物
冶金
卤化
极化(电化学)
电解质
电化学
复合材料
电极
化学
物理化学
作者
D. Dzhurinskiy,Stanislav Dautov,P. Shornikov,Iskander Akhatov
出处
期刊:Coatings
[MDPI AG]
日期:2020-12-22
卷期号:11 (1): 4-4
被引量:16
标识
DOI:10.3390/coatings11010004
摘要
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.
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