Steel corrosion occurs to varying degrees in both natural and artificial environments. If anti-corrosion measures are not taken or are inadequate due to the electrochemical action of oxygen and moisture in the atmosphere, as well as the influence of corrosive gases in the atmosphere, it will lead to rusting of steel structures, reduce the load-bearing capacity of the structures, shorten their service life, and affect their durability.

Therefore, anti-corrosion measures should be taken for steel structures. While implementing anti-corrosion measures, attention should also be paid to the following points:

(1) Consider the overall layout of the building. If there are areas within the structure that generate corrosive media, they should be isolated and a layout scheme conducive to natural ventilation indoors should be adopted.

(2) Opt for construction that is easy to inspect, clean, paint, and is resistant to dust and water accumulation. When using an open cross-section, the opening should face downward—especially for exposed outdoor areas.

(3) Opt for members with a smaller surface area whenever possible.

(4) Corrosion-resistant steel can be used when necessary.

The current national standard in our country, "Design Code for Corrosion Protection of Industrial Buildings" GB50046, stipulates: When the corrosion grade is severe or moderate, truss steel structures should not be used; when the corrosion grade is severe, T-sections composed of angle steel and I-sections composed of channel steel should not be used; and when the corrosion grade is moderate, their use is not advisable.