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When people buy locks, they are generally concerned that the locks are not durable or that the surface will rust or oxidize in a short time. This issue is related to the use of materials and surface treatment issues.
From a durable point of view, the best material should be stainless steel, especially as a surface material, the more light it is. Its strength, corrosion resistance, color unchanged. However, there are many types of stainless steel, which can be mainly divided into ferrite and austenite. Ferritic stainless steel is magnetic, commonly known as stainless iron, a long time, the environment is not good will rust, only austenitic stainless steel will not rust, the identification method is simple, use a magnet to test can be identified.
Copper is one of the most widely used lock materials. Its mechanical properties are good, corrosion resistance and processing performance are good, and bright color, especially copper forged handles and other lock decorative parts, the surface is flat, high density, no porosity, Blisters. Both strong and rust-proof, can be used to plate 24K gold or gold and other surface treatment, it looks magnificent, noble and generous, adding a lot of color to people's homes.
Zinc alloy materials have much less strength and rust resistance, but they have the advantage of being easy to make into complex pattern parts, especially pressure casting. The more complex pattern locks seen on the market are likely to be made of zinc alloys, and consumers should carefully identify them.
Steel has good strength and low cost, but it is prone to rust. It is generally used as a material for the internal structure of locks and is not suitable for external trims.
Aluminum or aluminum alloy ordinary aluminum alloy (except for aerospace) is soft and light, the material strength is relatively low, but easy to process and shape.
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