Different Materials of the Lock Life Are Not the Same
When people choose and buy a lock, it is to worry commonly lock is not durable or after a used period of time, the surface rusts or oxidizes. The problem is related to the material and surface treatment of the lock.
From the point of view of durability, the best material should be stainless steel, especially as a surface material, the more you use the brighter. Its strength is good, corrosion resistance is strong, color is invariable.
Copper is one of the most widely used lock materials, its mechanical performance is good, corrosion resistance and processing performance are good, and color gorgeous, especially copper forging handle and other lock decorative parts, the surface is flat, good density, no porosity, sand hole. It is firm and rustproof and can be used for plating 24K gold or sand gold and other surface treatment.
Zinc alloys are much less strong and rustproof, but they have the advantage of being easy to make into complex patterned parts, especially for pressure casting. The lock that the more complex design that market place sees has a very big likelihood is zinc alloy to do, the consumer should differentiate carefully.
Steel, the strength is better, the cost is lower but easy to rust, generally used as lock internal structure material, unfavorable for external use.
Aluminum or aluminum alloy, ordinary aluminum alloy (except aerospace) soft and light, material strength is lower, but easy to process and form.
The surface treatment is generally referred to as the use of metal electrodeposition (commonly known as electroplating), coating (known as spraying), chemical oxidation (coloring) or other processing methods to cover the surface of parts or form a protective film. The film mainly plays a role in anti-corrosion, but also increases the appearance and durability of the product, which is an important factor to directly measure the quality of the product. Common methods of measuring surface treatment include thickness measurement, adhesion test, salt spray and moisture test, appearance test, etc. The coating is used for film adhesion, hardness, moisture test, and appearance inspection methods.