Why aluminum alloy die castings turn black

　　1. Do not use cleaning agents improperly:

　　The cleaning agent used has strong corrosion, which leads to air oxidation of die cast aluminum.

　　2. Delayed logistics and warehousing management:

　　Storing aluminum alloy die castings in a warehouse with different aspect ratios results in varying levels of mold growth.

　　3. Unscientific process technology:

　　The negligence of aluminum alloy die castings after cleaning or pressure inspection has set a standard for mold growth and blackening of castings, accelerating the transformation of mold.

　　4. Environmental factors of aluminum alloy profiles:

　　Aluminum is a cheerful metal material that is very prone to air oxidation, blackening or mold growth under high temperature and environmental humidity standards. It is determined by the characteristics of aluminum itself.

　　5. Internal elements of aluminum alloy profiles:

　　Many aluminum die-casting manufacturers do not clean everything after the mechanical processing process, or use simple tap water cleaning, which cannot completely clean and tidy. The surface of die-casting aluminum has residual corrosive chemicals such as release agents, cutting oil, saponification solution, and other dirt, which accelerates the rate of mold growth and blackening of aluminum alloy die-casting parts. So in daily use, we need to pay more attention to the maintenance and cleaning of aluminum alloy die castings, which can effectively avoid these problems.

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