2018
DOI: 10.3390/met9010022
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Effect of Negative Current on the Microstructure of Oxide Coatings Prepared by Hybrid Pulse Anodization

Abstract: The oxide coatings were prepared on 6061 Al alloy at different negative current densities in oxalic acid using the hybrid pulse anodization (HPA) method at room temperature. The variation curves of positive and negative voltages with anodization time were recorded. The nanopore diameters and distribution regularities in HPA coatings were analyzed with the Image-Pro Plus software based on field-emission scanning electron microscope (FE-SEM) images. The results showed that the negative current could reduce the g… Show more

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