If the door lock is a zinc alloy material, its hardness and rust resistance are poor, that is, thick plating tends to fade black and decay blisters, but its advantages are easy to make complex pattern parts, especially pressure casting. The more complex patterns seen in the market are likely to be made of zinc alloy locks, consumers should be carefully identified. Steel, better strength, lower cost, but easy to rust, generally used as a lock internal structural materials, should not be used for external decorative pieces. Aluminum or aluminum alloy, ordinary aluminum alloy (except for aerospace) soft and light, the material strength of the end, but easy to shape. Copper is one of the most widely used lock materials, its mechanical properties, corrosion resistance and processing performance are good, and bright colors, especially copper forged handles and other locks decorative pieces, the surface is flat, good density, no porosity, Blister Both solid and rust-proof, can be used to plated gold or placer gold and other surface treatment, it is magnificent, elegant, generous to people's home to add a lot of color. From a durable standpoint, the best material should be stainless steel, especially for use as a surfacing material, the more shiny the more. Its good strength, corrosion resistance, color the same. However, there are a variety of stainless steel, mainly divided into ferrite and austenite. Ferritic stainless steel magnetic, commonly known as stainless steel, a long time, the environment will not rust, at present, only 304 stainless steel is the best stainless steel. Usb Mini Fridge,Usb Refrigerator,Usb Can Cooler,Usb Fridge For Car Yuyao Veedai Electrical Appliance Co., Ltd , https://www.nbkxveed.com