大连数控加工中铝铸造通常是用金属型铸造，金属资料铝及铝合金具备不错的流通性和可塑性，但在使用过程中极度容易发黑，今天就来说一说为什么在大连数控加工中铝表层变黑有哪些原因？
1.结构设计不科学。铝合金压铸件在洗濯或压检后处置方式不正确，为铝合金压铸件起霉发黑塑造了尺度，加快了霉变的形成。
2.物流仓储治理不实时。将铝合金压铸件储放在仓库不一样的高度，其起霉的情况也不一样。
3.铝合金的内部结构原因。很多铝合金压铸件厂商在压铸、机械加工工序以来，不做其余洗濯处置，或是单一的用水冲冲，没法做到齐全洗濯整洁，压铸铝表层残存有脱模剂、切削液、皂化液等浸蚀物质和其余污渍，这种污渍加快了铝合金压铸件长霉点发黑的快率。
4.铝合金表部环境原因。铝是活跃金属资料，在肯定的温度和环境湿度尺度下较易氧化发黑或起霉，它是铝自身的个性影响的。
5.选择洗濯剂不切当。选择的洗濯剂具备强浸蚀，导致压铸铝浸蚀氧化。
Aluminum casting in Dalian CNC machining is usually done using metal molds. Metal materials such as aluminum and aluminum alloys have good flowability and plasticity, but they are very prone to blackening during use. Today, let's talk about why the surface of aluminum turns black in Dalian CNC machining and what are the reasons?
1. The structural design is not scientific. The incorrect treatment of aluminum alloy die-casting parts after cleaning or pressure inspection has set a standard for mold formation and blackening, accelerating the formation of mold.
2. Logistics and warehousing management is not timely. Storing aluminum alloy die-casting parts at different heights in the warehouse results in varying degrees of mold formation.
3. Internal structural reasons of aluminum alloy. Many aluminum alloy die-casting manufacturers do not perform other cleaning treatments after die-casting and mechanical processing, or simply rinse with water, which cannot achieve complete cleaning and cleanliness. There are residual corrosive substances such as release agents, cutting fluids, saponification solutions, and other stains on the surface of the die-casting aluminum, which accelerate the speed of mold growth and blackening of aluminum alloy die-casting parts.
4. External environmental factors of aluminum alloy. Aluminum is a reactive metal material that is prone to oxidation, blackening, or mold formation under certain temperature and humidity standards. It is influenced by the characteristics of aluminum itself.
5. Improper selection of cleaning agents. The selected cleaning agent has strong corrosion resistance, causing corrosion and oxidation of die cast aluminum.
