The microarc oxidation (MAO) coating and anodic oxidation coating were prepared on 5083 aluminum alloy. The surface morphology, elemental composition, and electrochemical behavior of the two coatings were analyzed. The results proved that the corrosion resistance of the MAO coating is superior than that of the anodic oxidation coating. The protective ability of the coating deteriorated gradually with the increase in immersion time. The corrosion process is controlled by ion diffusion throughout the coatings.

中文翻译：

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5083铝合金微弧氧化涂层和阳极氧化的腐蚀行为

在5083铝合金上制备了微弧氧化（MAO）涂层和阳极氧化涂层。分析了两种涂层的表面形貌、元素组成和电化学行为。结果证明，MAO涂层的耐腐蚀性能优于阳极氧化涂层。随着浸泡时间的增加，涂层的防护能力逐渐下降。腐蚀过程由整个涂层的离子扩散控制。