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 material
It is one of the most widely used lock materials. Its mechanical properties are good, corrosion resistance and processing performance are good, and beautiful color, especially copper forged handles and other lock decorative parts, the surface is flat, high density, no air hole, trachoma. 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 material
Its strength and rust resistance are much worse, but its advantage is that it is easy to make parts with complex patterns, 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
Better strength, lower cost, but easy to rust, generally used as internal structural material for locks, not suitable for external trim.
Aluminum or aluminum alloy
Ordinary aluminum alloys (except for aerospace) are soft, light, and have lower material strength, but are easier to shape and shape.
Information from China Safe Exchange/
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