Energy consumption, wear and corrosion of PEO coatings on preanodized Al alloy: the influence of current and frequency
Energy consumption, wear and corrosion of PEO coatings on preanodized Al alloy: the influence of current and frequency
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DOI：
10.1016/j.jmrt.2022.10.049
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发表时间：
2022-10-28
影响因子：
6.4
通讯作者：
Arrabal, R.
中科院分区：
文献类型：
--
作者：
Mohedano, M.;Lopez, E.;Arrabal, R.
研究了电流和频率对经硫酸阳极氧化预处理的工业铝合金等离子体电解氧化（PEO）能耗的影响。与直接PEO处理（50 Hz）相比，PEO处理期间20 mm厚的前体阳极多孔膜、高电流（500 mA cm-2）和频率（400 Hz）的组合可节省高达76%的能源。对于PEO_50和A + PEO_400，实现均匀涂层厚度所需的时间也分别从3350 s减少到750 s。尽管涂层厚度较低，但优化涂层（400 Hz）的磨损和腐蚀性能也得到了改善。这种改善主要归因于与高频处理相关的显微组织细化和早期交易到“软火花”制度。频率的改变比阳极前体的存在对腐蚀响应具有更强的影响。PEO_400的腐蚀响应最好，其次是A + PEO_400。(c)2022作者。由爱思唯尔公司出版。这是一篇开放获取的文章，获得了CC BY-NC-ND许可证（http：//creativecommons.org/licenses/by-nc-nd/4.0/）。
The influence of current and frequency on energy consumption of plasma electrolytic oxidation (PEO) of a commercial aluminium alloy pre-treated by conventional anodizing in sulphuric acid has been investigated. The combination of a 20-mm thick precursor anodic porous film, high current (500 mA cm-2) and frequency (400 Hz) during PEO enables up to 76% energy savings compared to direct PEO treatment (50 Hz). The time needed to achieve a uniform coating thickness was also reduced from 3350 s to 750 s, for PEO_50 and A + PEO_400, respectively. The wear and corrosion performance of the optimised coatings (400 Hz) were also improved despite the lower thickness of the coatings. Such improvement was mainly attributed to the microstructural refinement associated with high frequency processing and early transaction to the "soft-sparking" regime. The modification of the frequency has a stronger influence on the corrosion response than the presence of the anodic precursor. The best corrosion response was obtained for PEO_400 followed closely by A + PEO_400. (c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).