How To Prevent Corrosion Of Industrial Metal Structure Buildings ?

Under normal circumstances, the steel structure building does not corrode or corrodes slowly after adding a protective layer. The life of some buildings can reach hundreds of years, but under some conditions, the steel structure has an amazing corrosion rate, which can be rusted in a few years or less. Destruction of buildings can be done within a short period of time. The corrosion process is generally as follows: micro-cracks and holes in the protective layer of the steel structure, peeling of the protective layer, intrusion of harmful media; corrosion of the steel structure; severe corrosion of the steel structure; reduction of the performance of the steel structure and damage to the structure or components. Its anti-corrosion treatment can generally be considered from two aspects:

 

 

A. Take measures according to the corrosion level

Generally, In the steel structure building design,  the steel structure we adopt, its corrosion level can be divided into four grades: strong, medium, weak, and no. Under the condition of strong rust (a large amount of CO2, SiO2, H2S industrial environment), the corrosion rate of the material is fast, and the components and parts must be protected by surface isolation; under the condition of moderate rust, the material has a certain degree of rust, and the weight of the component can be increased. , or use simple surface protection; under weak rust conditions, the material rusts slowly, but some measures need to be taken; under no rust conditions, the material rusts very slowly or there is no obvious rust trace, and components and parts may not take protective measures.

 

 

B. Processing of key links

Base treatment: For most steel beam manufacturers, It's important that the anti-corrosion base treatment of the steel structure must be qualified and meet the specific requirements of the design drawing s, such as the use of alkyd enamel paint, epoxy zinc-rich paint, chlorosulfonated polyethylene, galvanized, etc.
 

Temperature and humidity: The ambient temperature and relative humidity during coating should meet the product requirements, the ambient temperature should be 5-38°C, the relative humidity should not be greater than 85%, and the surface should not be coated with dew. Do not rain within 4 hours after painting.
 

Thickness of spray coating: It should meet the design requirements. The spray coating used on the day is configured on the same day, and diluents are not allowed to be added at will. Coating performance: The influence of various harmful media on the steel structure should be considered, and the spray coating suitable for the working environment should be selected to ensure the anti-corrosion quality, which we can see widely used by the steel structure warehouse manufacturers to prevent  the rain corrosion.