China HPDC factory new technology applied in aluminum housing that pass 1000H salt spray test. The functions of surface treatment are two. One important role is to protect the casting, and the other is for good appearance. The aluminum alloy casting housing is easy to corrode when exposed to air. So the casting shells need the protective from surface treatment especially in a stringent environment. We have special technology that help to improved salt spray capability up to 1000 hours. The following are the product advantages of this China HPDC factory new technology applied in aluminum housing that pass 1000H salt spray test