The products produced by aluminum alloy die-casting have the characteristics of corrosion resistance, low specific gravity, and high strength, making them excellent metal products. They can also effectively improve the physical, chemical, and mechanical properties of the die-casting parts through heat treatment, so aluminum alloy die-casting is very popular.

The raw material used for aluminum alloy die-casting has a relatively loose structure and high porosity, so its formability is not good. The produced die-casting parts are prone to some pores, some of which are still inside. If they cannot be repaired, they will be scrapped. To repair these pores, infiltration treatment is necessary.

Immersion, also known as immersion, infiltration, or infiltration, is a process of filling the pores of a product by immersing it into an infiltration solution through natural infiltration, vacuum pumping, pressure, and other methods. After the infiltration solution solidifies, it can compensate for the pores. Immersion treatment is not omnipotent, and it is impossible to repair all defects by this method. Good products are produced, not repaired.