Aluminum oxide is actually aluminum oxide or aluminum alloy. There are many ways to oxidize aluminum, and they are all practical. Aluminum oxidation has certain particularities. The oxidized surface of aluminum will have strong adsorption force and high porosity, which will cause the aluminum to be easily polluted after oxidation. Therefore, after anodic oxidation, the oxide film needs to be sealed, so as to further improve the corrosion resistance and wear resistance. For example, boiling water and steam sealing, hydrolytic salt sealing, dichromate sealing, fill and seal. Boiling water and steam sealing methods are also the most common sealing methods.
The boiling water vapor sealing method is a chemical oxidation reaction, mainly to allow alumina to undergo anhydrous oxidation under high temperature conditions. After anhydrous oxidation, it becomes a monohydrate, and the volume of the oxide increases and is oxidized into a trihydrate. When recombined, oxides increase in volume even more. Among them, the boiling water sealing method is to put the oxidized aluminum into hot water, and the oxide film on the inner wall of the barrier layer and the porous layer will be hydrated first, but there are some differences between the two, which will cause the bottom of the hole to be sealed until it is completely closed. , the water cycle will not proceed, and the boiling water oxidation starts from the surface of the membrane layer until the gap behind is blocked.
Of course, steam sealing will be more effective at sealing gaps than boiling water sealing. Because of this, some aluminum oxidation production plants have begun to use our steam generators, which can avoid the gaps from being blocked as much as possible, can greatly improve the efficiency of the factory, and the improvement of the aluminum oxidation process and the improvement of the quality of aluminum products have echoed in the market Very good.
Why is it best to use a steam generator for aluminum oxidation? In fact, during the aluminum oxidation process, the steam generator can quickly reach the temperature required for aluminum oxidation, and will not reduce the aluminum oxidation efficiency or cause other abnormal problems due to problems. The steam generator can also heat hot water, which means that not only the steam sealing method can be realized, but also the boiling water sealing method can be realized. For aluminum oxidation plants, there are more sealing methods that can be chosen by themselves, which can not only save equipment, but also improve the efficiency of aluminum oxidation and improve the level of aluminum oxidation process.