Experts in the die casting industry know that aluminum alloy die castings are widely used, especially in smart door locks, alloy gears, zinc alloy die castings, aluminum alloy die castings, motor gear boxes, household appliances, communication electronics, intelligent security, electric tools, office supplies, various zinc alloy die casting accessories, ADC12 Aluminum Alloy, which is a common brand of aluminum alloy die castings, It is widely used in customization of various aluminum alloy die castings, and the demand for aluminum alloy die castings is also very large. The demand for aluminum alloy die castings is increasing rapidly, which greatly promotes the development of zinc alloy die casting industry.

Because aluminum alloy die castings are one-time die-casting, with high production efficiency and low processing cost, they are especially suitable for parts with less strict tolerance requirements and complex geometry. They have been widely used to replace structural parts and decorative parts with less stress and complex shape made of copper, copper alloy and steel materials, and their surface treatment process is also in the mature stage. So ADC12 is widely used in various fields. What are the characteristics of this material?

Zinc alloy die casting is an alloy mainly composed of zinc and supplemented by aluminum. Its chemical stability is poor, so it needs to be protected by other metal layers, and electroplating layer is one of them. However, the ratio of zinc and aluminum content of zinc alloy die castings should be known before electroplating. If the aluminum content is too high, it will accelerate the oxidation of the surface layer and reduce the adhesion of the coating; if the aluminum content is too low, it will affect the toughness of the parts and be prone to fracture in the process of use. From the perspective of electroplating and its application, the aluminum content in the alloy is preferably between 3.5% ~ 4%. Whether the pretreatment of zinc alloy die castings is reasonable or not is the key to the success or failure of electroplating.

1. ADC12 Aluminum alloy material content analysis

ADC12 Aluminum alloy is composed of aluminum (AL), copper (Cu) 1.5 ~ 3.5, silicon (SI) 9.6 ~ 12.0, magnesium (mg) ≤ 0.3, zinc (Zn) ≤ 1.0, iron (FE) ≤ 1.3, manganese (MN) ≤ 0.5, nickel (Ni) ≤ 0.5, tin (SN) ≤ 0.2, calcium (CA) ≤ 200ppm, lead (PB) ≤ 0.1 and cadmium (CD) ≤ 0.005. We can see that ADC12 contains more silicon, copper and aluminum, so it is also called ai-si-cu alloy, Therefore, there are still many limitations in the surface treatment of aluminum alloy die castings.

2. Good die casting performance: ADC12 is suitable for thin castings due to its good die casting formability

3. After surface treatment, zinc alloy die castings not only have beautiful appearance and unique shape, but also have strong corrosion resistance, wear resistance, fall resistance and strike resistance, texture and durability.