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首页> 外文期刊>International Journal of Electrochemical Science >Effect of Er on the Characteristics of an Oxide Coating Prepared by Micro-Arc Oxidation on a 7075 Aluminum Alloy
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Effect of Er on the Characteristics of an Oxide Coating Prepared by Micro-Arc Oxidation on a 7075 Aluminum Alloy

机译：Er对7075铝合金微弧氧化制备的氧化膜特性的影响

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摘要

7075 Aluminum alloys with 0% (wt.%), 0.15% and 0.30% Er were subjected to micro-arc oxidationunder the same parameters. The surface morphology and the phases of the oxide coating were analyzedusing SEM and XRD. The microhardness, thickness and corrosion resistance of the oxide coating werealso studied. The results show that the micro-arc oxidation coating on a 7075 aluminum alloy withdifferent Er contents is composed of the gamma-Al 2 O 3 phase. With increasing Er content, the peak ofthe gamma-Al 2 O 3 phase becomes stronger. Er enters the oxide coating in the form of Al 17 Er 2 , which isan unbalanced phase under micro-arc oxidation. With increasing Er content, the surface deposits becomefiner and more uniform, the microhole diameter decreases, and the flatness increases. As the Er contentincreases from 0% to 0.30%, the micro-hardness and thickness of the oxide coating also increase, andthen the corrosion resistance increases significantly. Consequently, the self-corrosion current densitydecreases from 4280.0 nA/cm 2 to 2.405 nA/cm 2 .
机译：在相同的参数下，对具有0％（重量％），0.15％和0.30％Er的7075铝合金进行微弧氧化。使用SEM和XRD分析了氧化物涂层的表面形态和相。还研究了该氧化物涂层的显微硬度，厚度和耐腐蚀性。结果表明，不同Er含量的7075铝合金微弧氧化膜由γ-Al2 O 3相组成。随着Er含量的增加，γ-Al2 O 3相的峰变强。 Er以Al 17 Er 2的形式进入氧化物涂层，Al 17 Er 2是微弧氧化下的不平衡相。随着Er含量的增加，表面沉积物变得更细和更均匀，微孔直径减小，平坦度增加。随着Er含量从0％增加到0.30％，氧化物涂层的显微硬度和厚度也增加，然后耐蚀性显着增加。结果，自腐蚀电流密度从4280.0nA / cm 2减小到2.405nA / cm 2。

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