阳极氧化膜有三种发光现象:火花放电,电解发光,热发光。有些电解液加100V以上电压进行阳极氧化时,会发出拍拉拍拉的声音,在氧化膜表面可见许多斑点状的光。这是绝缘阳极氧化膜被破坏引起火花放电的现象。这种称为氧化膜之绝缘破坏。这和天空中因带负电荷与带正电荷的云所发生的打雷现象相同。在硅酸钠水溶液中阳极氧化时容易引起火花放 Anodized film has three kinds of luminescence: spark discharge, electroluminescence, thermal luminescence. Some electrolytes plus 100V above the voltage for anodic oxidation, it will issue a beating beat sound, the surface of the oxide film can see many spots of light. This is the phenomenon of the sparking discharge caused by the destruction of the insulating anodic oxide film. This is called the oxide film insulation damage. This is the same as the thunderstorm occurring in the sky due to the negative charge and the positively charged cloud. In the sodium silicate aqueous solution prone to sparking when anodized