When people buy locks, they are generally worried that the locks will not be durable or the surface will rust or oxidize. This problem is related to the materials used and surface treatment issues. From a durable point of view, the best material should be a stainless steel padlock, especially as a surface material, the more bright it is. It has good strength, strong corrosion resistance and constant color. However, there are many kinds of stainless steel, which can be mainly divided into ferrite and austenite. Ferritic stainless steel has magnetic properties, commonly known as stainless steel. It takes a long time, and the environment is not good, it will rust. Only austenitic stainless steel will not rust. The identification method is very simple. It can be identified with a magnet.
Copper is one of the most widely used lock materials. It has good mechanical properties, good corrosion resistance and processing properties, and its color is beautiful. Especially for copper forged handles and other locks, the surface is flat, the density is good, and there is no air hole. Sand eyes. It is both strong and rust-proof. It can be used for plating various surface treatments such as 24K gold or gold, which is magnificent, noble and generous, adding a lot of color to people's home.
Zinc alloy materials have much lower strength and rust resistance, but have the advantage of being easy to make parts with complex patterns, especially for pressure casting. The locks of the more complicated patterns seen in the market are likely to be made of zinc alloy, and consumers should carefully identify them. Steel, good strength, low cost, but easy to rust, generally used as the internal structural material of the lock, not suitable for external decorative parts. Aluminum or aluminum alloy, ordinary aluminum alloy (except aerospace) is soft and light, and the material strength is lower, but it is easy to form.
Surface treatment Surface treatment refers to covering or forming a protective film on the surface of a part by metal electrodeposition (commonly known as electroplating), painting (called spraying), chemical oxidation (coloring) or other processing methods. The film mainly acts as a preservative, and at the same time increases the aesthetics and durability of the product, which is an important factor for directly measuring the quality of the product. Common methods for measuring surface treatment include: thickness measurement of the cover layer, joint force inspection, salt spray and moisture test, and visual inspection. The coating is applied by methods such as film adhesion, hardness, moisture test, and visual inspection.
Check whether the function of the product is reliable and flexible. Two or more products should be selected for comparison check. Especially when purchasing the two-way lock product, the inner and outer locks must be tested with all the keys. You should also check the insurance organization of the product. It is recommended to try each lock at least three times.
1. Products with high reputation, stable quality and good after-sales service should be selected.
2. First check whether the packaging and logo of the purchased product are complete (including the product's implementation standards, grades, manufacturing company name, address, production date). The packaging is firm, the contents of the manual are consistent with the product, and the caution is exaggerated and does not match the facts. phenomenon.
3. Observe the appearance quality of the product, including whether the lock head, lock body, lock tongue, handle and cover plate parts and related parts are complete, whether the surface color of the plated parts and painted parts is bright and uniform, whether there is rust, signs of oxidation and damage .
4. Check whether the function of the product is reliable and flexible. Two or more products should be selected for comparison check. Especially when purchasing the two-way lock product, the inner and outer locks must be tested with all the keys. You should also check the insurance organization of the product. It is recommended to try each lock at least three times.
5. Then check the tooth condition of the key, such as five spoon teeth, each key should have not less than three different key teeth, while the first tooth and the fifth tooth should try not to choose the deepest key tooth, which is good for key insertion. Pulling is not easy to break.
Editor in charge: Zhang Qiqi
Mine Equipment,Prospecting Equipment,Mining Machines,Gold Prospecting Equipment
Taiyaun JDS Machinery And Equipment Co., Ltd. , https://www.jdsmachine.com