The surface of die-casting aluminum alloy products is blackened, especially after machining, which is shown as black spots and black spots. This situation may It is because the pressure is not enough and the density of the workpiece is not enough during die casting, so pores are formed. This problem occurs after the pores absorb water and are oxidized
一铝合金压铸件发霉变黑的原因分析Cause Analysis of Mold and Blackening of an Aluminum Alloy Die Casting
First, external environmental factors. Aluminum is an active metal, which is easily oxidized and blackened or mildewed under certain temperature and humidity conditions, which is determined by the characteristics of aluminum itself.
Second, internal factors. After the die casting and machining processes, many manufacturers do not do any cleaning treatment, or simply flush with water, which can not be completely cleaned. The surface of die cast aluminum remains corrosive substances such as mold release agent, cutting fluid, saponification fluid, and other stains, which accelerates the growth of mold spots in aluminum alloy die castings;
Third, the process design is unreasonable. Improper treatment of aluminum alloy die castings after cleaning or pressure inspection creates conditions for aluminum alloy die castings to become mouldy and accelerates the formation of mouldy;
Fourth, the cleaning agent is inappropriate. The cleaning is highly corrosive, causing corrosion and oxidation of die cast aluminum. Fifth, warehousing management is not in place. When the storage warehouse is at different heights, the mildew condition is different.
Countermeasures: From the analysis of the causes of mould forming of die cast aluminum, we can easily draw the conclusion that the oxidation prevention problem is not caused by a single factor, it involves internal and external, process, storage and other aspects.
At the same time, anti oxidation should be considered in all processes such as cleaning, pressure inspection, storage and transportation. If any problem occurs in any link, you will see the mildew. Therefore, this is a comprehensive problem, and an overall solution is needed.
From the perspective of die casting aluminum cleaner, die casting aluminum antioxidant, process, storage environment, storage mode, Yujie Technology has solved the problem of aluminum alloy die castings becoming moldy, and can provide anti oxidation solutions for all processes of die casting aluminum cleaning, pressure inspection, and storage.