Introduction Of Keyed Padlocks Material And Surface Treatment

　　When people buy keyed padlocks, they are generally worried that keyed padlocks are not durable or that the surface will rust or oxidize after a long time. This question is related to the material used and the surface treatment.

　　From the point of view of durability, the better material should be stainless steel, especially when used as surface material, the more you use the stainless steel lock, 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 is one of the most widely used keyed padlocks materials. It has good mechanical properties, good corrosion resistance and processing performance, and bright colors, especially for copper forged handles and other keyed padlocks decorative parts. Pores, sand holes. It is strong and rust-proof and can be used for various surface treatments such as 24K gold or alluvial gold. It looks magnificent and generous and adds 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 die casting. The keyed padlocks with more complex patterns seen on the market are likely to be made of zinc alloy, and consumers should carefully identify them.

　　Steel has good strength and low cost, but it is easy to rust. It is generally used as an internal structural material for keyed padlocks, and it is not suitable for external decorative parts.

　　Aluminum or aluminum alloys, ordinary aluminum alloys (except for aerospace use) are soft and light, and the material strength is relatively low, but they are easy to process and form.

　　Surface treatment generally refers to the use of metal electrodeposition (commonly known as electroplating), coating (called spraying), chemical oxidation (coloring), or other processing methods to cover or form a protective film on the surface of parts. The film mainly plays the role of anti-corrosion, but also increases the appearance and durability of the product, which is an important factor in directly measuring the quality of the product. Common methods for measuring surface treatment are thickness measurement of the cover layer, adhesion inspection, salt spray, humidity test, appearance inspection, etc. The coating is carried out by methods such as coating adhesion, hardness, moisture test, and appearance inspection.