1. Rinse with hot water. Hot water washing is intended to age the film layer. But the water temperature and time should be strictly controlled, the water temperature is too high, the film thin, the color becomes lighter. Industrial aluminum profile processing time is too long will also appear the above similar problems, the appropriate temperature and time is: temperature 40 ~ 50℃ time 0.5 ~ 1MIN.
2. Dry. It is better to dry naturally. The workpiece washed by hot water is hung slanted on the shelf, so that the free water on the working surface flows down in a vertical direction. Flow to the lower corner of the water with a towel to absorb, according to this method of drying film color is not affected, appears natural.
3. Aging. Aluminum profile
aging method can be determined according to climate conditions, there is sunlight in summer can be exposed in the sun, rainy days or winter can be baked in the oven, the process conditions are: temperature 40 ~ 50℃ time 10 ~ 15min.
4. Repair of unqualified parts. Unqualified conductive oxide membrane parts should be picked out before drying and ageing handle, because the membrane layer is difficult to eliminate after drying and ageing and will influence the roughness of the workpiece surface. This problem in the process of some exploration, through a variety of methods test, it is found that the following method is very good, simple method, and does not affect the surface exterior of the workpiece, the concrete process is as follows.
First of all, the unqualified workpiece is clamped on the fixture used for aluminum anodizing, and then let the aluminum in sulfuric acid solution anodizing method for anodizing 2 ~ 3min, until the film is soft, off, and then after a little alkaline cleaning and nitric acid light can be re conductive anodizing.