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首页> 外文期刊>Materials Chemistry and Physics >Influence of the frequency on the structure and corrosion resistance of ceramic coatings on Ti-6Al-4V alloy produced by micro-plasma oxidation
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Influence of the frequency on the structure and corrosion resistance of ceramic coatings on Ti-6Al-4V alloy produced by micro-plasma oxidation

机译：频率对微等离子体氧化制备Ti-6Al-4V合金陶瓷涂层结构和耐蚀性的影响

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摘要

The influence of the working frequency on the structure, morphology and corrosion resistance of ceramic coatings on Ti-6Al-4V by pulsed bi-polar micro-plasma oxidation in NaAlO2 solution has been studied. The produced coatings were composed of Al2TiO5, α-Al2O3 and Futile TiO2, of which Al2TiO5 was the main crystalline phase. An increase in frequency did not change the content of Al2TiO5, however, the content of Futile TiO2 increased gradually while the content of α-Al2O3 decreased drastically. The coating can be divided into two layers: a porous outer layer and a dense inner layer. The thickness of the coatings reduced as the frequency increased. The corrosion potential increased with decreasing working frequency. The corrosion current density of the coated samples decreased with decreasing working frequency up to 60 Hz and then increased with further decrease of the frequency. Therefore, the best corrosion resistance was attained in the coated sample, which was prepared under the frequency of 60 Hz. © 2005 Elsevier B.V. All rights reserved.
机译：研究了工作频率对NaAlO2溶液中脉冲双极微等离子体氧化对Ti-6Al-4V陶瓷涂层的结构，形貌和耐蚀性的影响。产生的涂层由Al2TiO5，α-Al2O3和Futile TiO2组成，其中Al2TiO5是主要的晶相。频率的增加并没有改变Al2TiO5的含量，但是，无效的TiO2的含量逐渐增加，而α-Al2O3的含量却急剧下降。涂层可分为两层：多孔外层和致密内层。涂层的厚度随着频率的增加而减小。腐蚀电位随着工作频率的降低而增加。涂层样品的腐蚀电流密度随着工作频率的降低而降低，直至60 Hz，然后随着频率的进一步降低而增加。因此，在60Hz的频率下制备的涂层样品中获得了最佳的耐腐蚀性。 ＆复制; 2005 Elsevier B.V.保留所有权利。

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