What Is Surface Pretreatment of Aluminum Strip 3mm
The aluminum strip 3mm is mainly used for processing parts that require good forming performance, high corrosion resistance, or good weldability, such as aircraft fuel tanks, oil pipes, as well as street lamp brackets and rivets, hardware products, etc. The surface pretreatment of aluminum strip is mainly degreasing and rust removal.
The main purpose of aluminum alloy pretreatment is to clean the dust, oil or rust on the material, and to ensure the quality of the later anticorrosion layer production, so pretreatment is very important. Generally speaking, if the aluminum strip roll has corrosion spots on the surface after pretreatment, there are several reasons:
1. The concentration of aluminum ions in the solution is high. That is mainly because a large amount of aluminum strips have been processed in this solution. Part of the solution should be drained and new solution should be added.
2. The working environment contains a lot of acid mist or alkali mist. Although the concentration is low, the aluminum alloy material is still prone to chemical reactions and corrosion points in such an environment. Pay attention to strengthen the air exhausting in the work room to reduce acid and alkali concentration.
3. After the work piece goes through the degreasing process, the interval before entering the cleaning process is too long. Because after degreasing, there may be residual chemical components on the surface. If it is not washed as soon as possible, it will react with the material and cause corrosion points.
4. In addition, there are stubborn oil stains or marks on the aluminum strip 3mm. The cleaning ability of the degreasing process is limited. Therefore, for stubborn marks or oil stains, it is best to clean them with organic solvents before chemical degreasing.
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