Suzhou Hongnuan electronic share: aluminum oxidation treatment points for attention

The unqualified workpiece is fixed to the fixing device and oxidized with aluminum, and then anodized for about 3 minutes according to the method of oxidizing aluminum in sulfuric acid solution. Once the film has softened and peeled off, wash it slightly with rye and ammonia. After dehydration, electrolytic oxidation can be carried out again.

Aluminum oxide technology requires that the workpiece be washed with an organic solvent (characteristic: clear, colorless liquid) before being transferred to a heat treatment or welding process to remove surface oil. A coking oil-based sintering layer (the process of transforming a powder material into a compact object) that is difficult to remove with organic solvents and causes localized corrosion when immersed in rye.

Aluminum alloy products are oxidized as follows:

1, degreasing treatment: before aluminum alloy treatment to degreasing aluminum alloy products, the purpose is to remove the protective oil layer of aluminum alloy surface, to ensure the uniformity of the surface in the later treatment.

2, acid etching treatment: after degreasing aluminum alloy must be carried out acid etching treatment, remove the oxide on the surface of aluminum alloy.

3, alkali etching treatment: after the acid etching treatment to carry out alkali etching treatment, the purpose is also to remove the oxide on the surface of aluminum alloy and the indentation left in the extrusion process.

4. Mixed acid treatment: After acid and alkali corrosion, there will be a layer of ash layer of mixed elements remaining on the surface of aluminum alloy, which must be removed by mixed acid to reveal the essential color of aluminum alloy.