The material
When people buy locks, they are generally worried about the lock is not durable or not long after the surface will rust or oxidation. This problem is related to the material used and the surface treatment.
From a durable point of view, the best material should be stainless steel, especially as a surface material, the more used the more bright. Its strength, corrosion resistance, color unchanged. But there are also a variety of stainless steel, mainly can be divided into ferrite and austenitic. Ferritic stainless steel has magnetic, commonly known as stainless iron, a long time, the environment is not good will rust, only austenitic stainless steel will not rust, identification method is very simple, with a magnet can be identified.
Copper is one of the most widely used lock materials, with good mechanical properties, good corrosion resistance and processing properties, and bright color, especially the handle and other lock decorative parts of copper forging, smooth surface, good density, no pores, sandholes. Already firm rustproof, can use plating 24K gold or all sorts of surface processing such as placer gold, appear gorgeous, high and easy, the household that gives people adds many colour.
Zinc alloy material, its strength and rust resistance is much worse, but its advantage is easy to make complex patterns of parts, especially pressure casting. The lock that the more complex design that market place sees is likely to be zinc alloy is done very much, consumer wants careful differentiate.
Iron and steel, good strength, low cost, but easy to rust, generally used as a lock internal structural materials, not as external decorative parts.
Aluminium or aluminium alloys, ordinary aluminium alloys (other than aerospace) are soft and light, with low strength but easy to form
Post time: Jan-21-2019