Rinse
Rinse with hot water. The purpose of it is to age the film. But the water temperature and time to be strictly controlled. If the water temperature is too high film thin, color get pale. Industrial aluminum extrusion processing time is too long also can appear the similar problems, suitable temperature and time are: temperature 40 ~ 50 ℃ time 0. 5 to 1 min.
Dry
Keep dry. It is better to dry naturally. Hang diagonally on the shelf, so that the water on the working surface flows down in a straight direction. Use a towel to wipe the water off. In this way, the film color is not affected natural.
Aging
According to climate condition to decide aluminum aging method. Exposure to the sun, or bake in oven. process condition is: temperature of 40 ~ 50 ℃ for 10 ~ 15 min.
Repair
Repair of unqualified parts. Unqualified conductive oxidation parts should be picked out before drying and aging process, because the film layer is difficult to be removed after drying and aging and will affect the roughness of the workpiece surface. After trying various methods, We find method which is simple and does not affect the work piece surface quality, the concrete process is as follows. First, clamp the unqualified workpiece on the clamps used for aluminum anodizing, and then anodized in sulfuric acid solution for 2 ~ 3min. After the film layer was soft and fell off, it could be re-conductive oxidation after washing with lye and nitric acid.