Method of preparing transparent film on magnesium alloy surface

The present invention relates to a method for preparing a transparent film on the surface of the magnesium alloy. This method is a DC power supply voltage is 150 ~ 200V is applied to the magnesium alloy is immersed in the alkaline electrolyte, the energization 5 to 15 minutes, of 20 m thick transparent or translucent oxide film thickness of 5 to generate a magnesium alloy. Electrolyte with deionized water used in the configuration process, the ratio of: 8 ~ 15g / l disodium hydrogen phosphate, 1 ~ 3g / l sodium aluminate, 25% ammonia water 2 ~ 8ml / l, 1 ~ 5ml / l triethylenetetramine. The process is simple, process safety features, in a bath with little environmental pollution, the oxide film is prepared as a colorless transparent, a base capable of reacting metallic magnesium alloy, having a good decorative properties, and can effectively improve the corrosion resistance of magnesium alloy can.