To the hard surface on the surface of aluminum, the factory will some industrial aluminum oxide, such processing results can not only improve the performance of aluminium workpiece, and can improve the aesthetic of the workpiece. But, after oxidation treatment on aluminum, some matters need attention, otherwise is not good for the effect of aluminium workpiece, and even aluminum material may also early damage.

1, hot water washing

Hot water washing the purpose is to make the film aging, but should strictly control the temperature and time. When the water temperature is too high, thin film layer and the color becomes shallow. If the treatment time is too long, the similar problem will happen. The right temperature and time is: the temperature of 40 ~ 50 ° C time 0.5 ~ 1 min.

2, dry

The most good natural drying after drying, use hot water washing of the workpiece will tilt on the shelf, so work on the surface of the free water will flow down along the vertical direction. With a towel to flow to the Angle of water droplets, the color of the dry film in this way is not affected, looks very natural.

3, the aging

Aging method can determine according to the climatic conditions. In the sunny summer, it could be exposed to the sun. Alumina can be on a rainy day or winter baking in the oven. Process condition is: temperature of 40 ~ 50 ° C for 10 ~ 15 min.

4. The unqualified parts rework

Before the drying and aging process, should choose unqualified parts conductive oxide film. After drying and aging is difficult to remove the membrane layer, this will affect the roughness of the workpiece surface. For the unqualified artifacts, we can adopt the following simple steps. To solve.

In the first place will not be eligible workpiece clamping on used in anodic oxidation of aluminum fixture, then according to the method of anodic oxidation of aluminum in sulfuric acid solution by anodic oxidation of 2 ~ 3 minutes, until soft and peeling membrane layer, and then using alkali wash slightly. Solution and nitric acid. After having to perform conductive anodic oxidation.

Aluminum oxidation process requirements in the workpiece is transferred to heat treatment before or during the welding process to remove surface oil, to use organic solvent to clean. However, this is usually not possible, on the surface of the workpiece to form a burning charcoal, it is difficult to in the removal of the organic solvent. If it is immersed in lye, will lead to local corrosion, pitting or uneven, which seriously affects the quality of the product.