In many workplaces, we need to carry out aluminum oxidation processing, which can improve the performance of the material. So, what are the differences between before and after aluminum oxidation processing? For this question, many friends must be more curious.
The first is that after aluminum oxidation processing, a dense oxide film will be formed on the surface of the material, so that even if it is placed in the air for a long time, the oxidation of the aluminum material inside can be prevented.
The second is that if the green material without oxidation treatment is placed in the air for a long time, it is prone to corrosion problems, and it is more prone to yellow spots or black spots.
The third difference is that after aluminum oxidation processing, a protective film will be formed on the surface of the material. This protective film will greatly improve the corrosion resistance of the material, and will also increase its melting and boiling point. It can also be used as a heat-resistant material, which does not have these characteristics if it is an aluminum material that has not been oxidized. In addition, the chemical properties of the material after oxidation treatment will be more stable.
Today, we can use different ways to achieve our goals when performing aluminum oxidation processing. For example, we can use low-temperature sulfuric acid oxidation, which will produce a finer oxide film and higher hardness; we can also use sulfuric acid and oxalic acid mixed acid oxidation, so that a hard oxide film can be obtained at room temperature; Oxidative coloring, the oxide film obtained by this method will be softer.
Of course, in actual operation, there are some other methods, and the effects obtained by different methods are different to some extent. Therefore, when we choose the aluminum oxidation processing method, we need to analyze the specific situation and choose the most suitable method.