Which metal material is better and safer for car locks?

A look at the material

The lock materials on the market are basically divided into stainless steel, copper, and zinc alloys. Stainless steel has high strength, strong corrosion resistance, no discoloration, and is the best lock-making material; copper is more versatile, has superior mechanical properties, and is relatively expensive; high-quality zinc alloy is strong and wear-resistant, corrosion-resistant, easy to form, and multi-purpose on the mid-range lock.

Second, look at the surface treatment

Surface treatment is roughly divided into three types: electroplating, spraying and coloring. Through surface treatment, a dense protective film is formed on the surface of the product, which plays the role of anti-corrosion and anti-rust, making the product more beautiful and durable. At the same time, it is also a standard to measure the quality of the product. The locks of good quality are mostly electroplated. The coating is fine and smooth, uniform and moderate, with bright color and no signs of bubbles, rust and oxidation.

Three look at the implementation standards

Foreign countries have very strict standards for hardware locks, so the quality of imported products is relatively high. At present, the Ministry of Light Industry has learned from some foreign standards to revise the originally implemented GB into the current QB with higher requirements. Branded manufacturers are already implementing the QB standard, and small manufacturers are still implementing the original GB standard. Clarify the product's implementation standards.

4. You can feel the quality of the lock with your hands. Generally speaking, the quality of locks that feel heavy is relatively high; the lock body should not be exposed to the tip, and the exposed tip will easily hurt people, especially pay attention to the three positions of the end of the lock handle, the lock tongue and the four corners of the lock body; the lock with a good lock spring can be opened flexibly , high sensitivity and long service life.

Building door locks generally include three categories: handle door locks, anti-theft fire door locks and electronic IC card door locks. Among them, electronic IC card door locks are not suitable for home use, because from the perspective of anti-theft and anti-prying functions, electronic locks are not stronger than mechanical locks, but the price is much more expensive, so they are mainly suitable for hotels, restaurants and other places. The anti-theft fire door lock is used for the anti-theft door and the entrance door of the living room. At present, most of them use a three-way safety structure, that is, three lock tongues lock the handle and the upper and lower bolts respectively. When selecting, pay attention to the material of the lock and the inspection certificate of the relevant department. The handle door locks on the market are rich in colors, including gold-plated, titanium-plated, silver-plated, chrome-plated, as well as imitation wood grain, frosted, imitation bronze and imitation gemstone colors. Which color, requires a fine and smooth surface, no spots, no rust. With the refinement and in-depth development of home decoration, the application of locks is also more specific, such as sliding door locks used on sliding doors, glass locks used on glass doors, bumper locks for children's rooms, etc. But the most widely used is the handle door lock. The handle door lock is divided into two styles: ball lock and handle lock. There is a stainless steel bathroom ball lock with waterproof function, which is specially designed for toilets. After entering the bathroom, press the safety button on the handle on the inside of the room, and the door will be locked. The most important thing is the quality of the lock. When you choose locks, try to buy products with higher brand awareness, because there is a problem of mutual opening rate. The mutual opening rate refers to the mutual opening ratio of the lock and the key. The fewer the locks opened by a key, the stronger the safety and reliability of the lock. At present, the mutual opening rate of world-renowned brand locks is only 1 in 10,000, and the mutual opening rate of excellent domestic lock brands is also about 1 in 6,000, while the products produced by some irregular lock factories without production strength are mutually opened. The rate is one-thirtieth, and the safety and reliability of such a lock is too poor. Good brand products, although the price is slightly higher, but the quality of the lock is guaranteed, it is still worth it. If you still want to choose a product with a low price, you can try to choose a lock with a large number of key teeth, because the more teeth the key has, the greater the difference, and the lower the mutual opening rate of the locks. From the perspective of lock durability, the best material should be stainless steel, especially as a surface material, the more you use it, the brighter it will be. It has good strength, strong corrosion resistance and unchanged color. But there are also many kinds of stainless steel, which can be mainly divided into ferrite and austenite. Ferritic stainless steel is magnetic, commonly known as stainless iron. It will rust after a long time and in a bad environment. Only austenitic stainless steel will not rust. The identification method is very simple, just use a magnet to identify it. Copper locks are one of the most widely used lock materials, with good mechanical properties, good corrosion resistance and processing performance, and bright colors, especially for the copper forged lock handles and other lock decorative parts, with smooth surface, good density, no Pores, sand holes. It is strong and rust-proof, and can be used for various surface treatments such as 24K gold or alluvial gold. Zinc alloy locks have much poorer strength and rust resistance, but the advantage is that it is easy to make parts with complex patterns, especially pressure casting. The locks with more complex patterns seen on the market are likely to be made of zinc alloy, and consumers should carefully identify them.