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首页> 美国卫生研究院文献>Materials >Wear and Corrosion Resistance of Plasma Electrolytic Oxidation Coatings on 6061 Al Alloy in Electrolytes with Aluminate and Phosphate
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Wear and Corrosion Resistance of Plasma Electrolytic Oxidation Coatings on 6061 Al Alloy in Electrolytes with Aluminate and Phosphate

机译：铝酸铝电解质6061 al合金上等离子体电解氧化涂层的磨损和耐腐蚀性

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摘要

Phosphate and aluminate electrolytes were used to prepare plasma electrolytic oxidation (PEO) coatings on 6061 aluminum alloy. The surface and cross-section microstructure, element distribution, and phase composition of the PEO coatings were characterized by SEM, EDS, XPS, and XRD. The friction and wear properties were evaluated by pin-on-disk sliding tests under dry conditions. The corrosion resistance of PEO coatings was investigated by electrochemical corrosion and salt spray tests in acidic environments. It was found that the PEO coatings prepared from both phosphate and aluminate electrolytes were mainly composed of α-Al2O3 and γ-Al2O3. The results demonstrate that a bi-layer coating is formed in the phosphate electrolyte, and a single-layered dense alumina coating with a hardness of 1300 HV is realizable in the aluminate electrolyte. The aluminate PEO coating had a lower wear rate than the phosphate PEO coating. However, the phosphate PEO coating showed a better corrosion resistance in acidic environment, which is mainly attributed to the presence of an amorphous P element at the substrate/coating interface.
机译：磷酸盐和铝酸铝电解质用于在6061铝合金上制备等离子体电解氧化（PEO）涂层。 PEO涂层的表面和横截面微结构，元件分布和相位组成的特征在于SEM，EDS，XPS和XRD。通过在干燥条件下通过针盘滑动测试评估摩擦和磨损性能。通过酸性环境中的电化学腐蚀和盐雾试验研究了PEO涂层的耐腐蚀性。发现由磷酸盐和铝酸盐电解质制备的PEO涂层主要由α-Al2O3和γ-Al2O3组成。结果表明，在磷酸盐电解质中形成双层涂层，并且在铝酸盐电解质中可实现硬度为1300HV的单层致密氧化铝涂层。铝酸盐PEO涂层的磨损率较低，磷酸盐PEO涂层较低。然而，磷酸盐的PEO涂层在酸性环境中显示出更好的耐腐蚀性，这主要归因于基板/涂层界面处的非晶P元素。

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