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一前言铝在阳极氧化过程中生成的氧化膜包含两层,第一层介于膜金属界面之间,该层无孔隙,叫做阻挡层,在恒电压下,阻挡层的厚度在整个氧化过程保持不变. 同时,随着铝表面氧化膜的生成,其外层容易被电解液腐蚀,这一层叫多孔层,它决定了阳极氧化膜的基本特征. 在恒电压情况下,当膜在电解液中的化学溶解速度等于膜的生长速度时,多孔层的厚度达到最大值,膜的极限厚度与工艺条件,电解液组成、温度、电流密度,电压和合金组成有关. 降低电解液的酸度,增加电流密度,并在低温操作下可以生成致密的厚氧化膜,普通阳极氧化液
An Introduction The aluminum oxide film formed during the anodic oxidation consists of two layers, the first layer being interposed between the metal-film interfaces, which layer is void-free and is called a barrier. Under constant voltage, the thickness of the barrier remains throughout the oxidation The same time, with the formation of aluminum oxide film on the surface, the outer layer is easily corroded by the electrolyte, this layer is called the porous layer, which determines the basic characteristics of the anodized film.In the case of constant voltage, When the chemical dissolution rate in the liquid is equal to the growth rate of the membrane, the thickness of the porous layer reaches a maximum, and the ultimate thickness of the membrane is related to the process conditions, electrolyte composition, temperature, current density, voltage and alloy composition, Increase the current density, and in the low temperature operation can generate dense thick oxide film, ordinary anodizing solution