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Study on Anodic Oxidation and Sealing of Aluminum Alloy

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Figure

Figure 1.  Low- and high-magnification SEM images of aluminum anodic oxidized with the single-potential step chronoamperometry mode
Fig. 3 indicated SR decreased with the anodic oxidation time.  The surface of aluminum oxide becomes
Figure 3.  Surface roughness of the aluminum samples after anodic oxidation for different time, (a) 4000s, (b) 8000s, (c) 10000s, (d) 12000s
Figure 4.  Images of the aluminum samples after the indentation hardness test.  (a), (b), (c) and (d) are the anodic oxidized samples and not sealed, sealed with boiling water, sealed with NiSO4 solution, and reddened respectively
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