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运用正向脉冲电流的恢复效应可产生高硬度氧化膜、反向脉冲电流可产生金属硫化物或氢氧化物而易于吸附染料的原理，在合理选择混合酸＋添加剂的工艺条件和大功率脉冲电源的波形、频率、占空比等技术参数的基础上，采用换向脉冲电源，在常温下进行硬质阳极氧化和染色工艺研究，并用于生产，解决了在国内铝及铝合金硬质阳极氧化时，要求氧化膜层既要有较高的硬度，又可染各种颜色，且工作电压较低，可在室温下操作等关键性问题。
The use of positive pulse current recovery effect can produce high hardness oxide film, reverse pulse current can produce metal sulfide or hydroxide and easy to dye adsorption principle, the reasonable choice of mixed acid + additive process conditions and high-power pulse power Of the waveform, frequency, duty cycle and other technical parameters based on the use of reversing pulse power, at room temperature for hard anodizing and dyeing process and used in the production, to solve the domestic aluminum and aluminum alloy hard anodizing When asked, the oxide film requires both high hardness, but also dyed a variety of colors, and lower operating voltage, can be operated at room temperature and other key issues.