Steel lockers are widely used in schools mainly for the following reasons:

1. Durability and strength: Steel materials are strong and durable, can withstand frequent use and possible impacts by students, and are not easy to deform or damage under long-term use, ensuring the long-term and stable use of lockers.

2. Security and confidentiality: Steel lockers are usually equipped with reliable locking systems, which can effectively protect students' personal belongings and prevent theft. In addition, the airtightness and strength of cold-rolled steel also ensure the confidentiality of storage space.

3. Moisture-proof and rust-proof: The relative humidity of the school environment may change greatly, especially in the areas near the gymnasium and bathroom. Steel lockers are phosphated and rust-proof, as well as electrostatic spraying process, which can effectively resist rust problems caused by humid environment.

4. Easy to clean and hygienic: The school has a large flow of people, and the lockers need to be cleaned regularly to maintain hygiene. The steel surface is smooth, and the cleaning work is simple and quick, which helps to maintain the hygienic standards of the changing environment.

5. Cost-effective: Although the initial investment may be higher than some other materials, steel lockers are extremely cost-effective in the long run given their extremely long service life (up to 30 years or more).

6. Environmental adaptability: Steel lockers can adapt well to both indoor and outdoor environments, are not affected by changes in temperature and humidity, and have a wide range of applications.

7. Flexibility: Steel lockers can be selected according to the specific size, color and structure of the school to meet the needs of different grades and occasions, such as setting clothes hangers, drawers or partitions.