Merchants who bought storage shelves, only one or two years after they bought storage shelves, then the storage shelves rust! There are two possibilities for this phenomenon. One is that the storage shelves are frequently hit by forklifts in the warehouse. Soon after, the skin of the storage shelves falls off, but the protective film is not applied to the surface of the storage shelves in time. Then the storage shelves are less than three years old. It’s rusty. The other is that the quality of storage shelves can’t be bought, generally because of this reason, the merchants who rust the storage shelves are almost cheap.
Rusty storage shelves may have these reasons:
1. Surface spraying process
The shelf spraying process often requires the following steps: rust removal, degreasing and degreasing, phosphating treatment, water cleaning, drying, electrostatic powder spraying, hot melting, curing, etc. These steps have strict requirements on the control of the processing time of each process, the concentration of the phosphating solution, the water temperature, the temperature of the drying room, etc., which require very good control. If the equipment is not advanced enough is an objective problem, then go up subjectively The purpose of destroying normal processes is to reduce shelf costs by reducing procedures and shortening processing time. But doing so does not guarantee product quality. Taking phosphating as an example, to reduce this process, powder spraying can still be completed, and it is difficult to see the problem in the short term.
2. Quality of raw materials
At present, most of the industrial shelves use steel as the main raw material, which largely determines the price of the shelves. Therefore, in order to make the shelves look more “cheaper”, some shelf manufacturers reduce the total amount of shelf items by reducing the amount of steel used in the shelves. Cost; on the other hand, the use of cheap and inferior small rolling mills rolled thin plates to produce shelves. However, small rolling mills lack equipment. To form a roll of material, it needs to be heated multiple times. In the process of multiple heating, the temperature of steel is difficult to control well. The mechanical properties of different parts of the material will have certain differences. -C crystal will produce diversity and instability, the surface density of the material is poor, and the corrosion resistance is weak.
Storage shelves are mostly assembled and assembled, and their surfaces are mostly electrostatic sprayed. With the rapid development of the logistics equipment industry, it is believed that the technical content and precision of the shelf system will become higher and higher, the structure will be more optimized, the variety will be more complete, and the adaptability will be more extensive. It will play an important role for the development of China’s logistics industry.