铝是钝化金属。与钛，钽和铌等金属一样，表面钝化氧化膜是提供保护的重要因素。因此，阳极氧化是一种非常有效的金属保护方法。是改善铝及其合金的保护，装饰甚至功能的有效方法。铝的阳极氧化过程可以从各种角度分类，例如，根据电解质溶液，阳极氧化的功率波形，阳极氧化膜结构，阳极氧化膜的特性等。根据不同电解质溶液中的阳极氧化，简要介绍了它们的工艺特性和阳极氧化膜的特性。

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