In this study, plasma electrolytic oxidation (PEO) process was applied to AA1060 aluminum alloy in an alkaline‐based electrolyte with different concentrations of EDTA‐2Na. The investigation of coatings was concentrated on sparks, phase, structure, morphology, and corrosion resistance. The whole process presented a “soft spark” regime which proved by the reduction of light and acoustic emission with increase of current. The results of SEM and EDS showed that more discharge channels were found under surface and the proportion of silicon in the inner layer increased for the sample treated in solution with 5 g/L EDTA‐2Na, which was attributed to D type discharge causing some light emission invisible on sample surface. The polarization test presented a better corrosion resistance with the increase of EDTA‐2Na. However, EIS measurement showed a bigger corrosion resistance for outer layer of sample prepared with the addition concentration up to 3 g/L that meant outer layer played a more critical role in terms of corrosion resistance.

中文翻译：

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EDTA-2Na对AA1060合金PEO涂层的组织和耐蚀性的影响。

在这项研究中，等离子电解氧化（PEO）工艺应用于具有不同浓度EDTA-2Na的碱性电解液中的AA1060铝合金。涂层的研究主要集中在火花，相，结构，形态和耐腐蚀性上。整个过程呈现出“软火花”状态，这通过电流的增加而减少了光和声发射。SEM和EDS结果表明，在5 g / L EDTA-2Na溶液中处理的样品表面下发现了更多的放电通道，并且内层中硅的比例增加了，这归因于D型放电引起一些光样品表面看不见发射。极化测试显示，随着EDTA-2Na的增加，其抗腐蚀性更好。然而，