The surface coating of FRP bridge can play a role in anti-corrosion
As a new type of building material, FRP bridge is widely used in bridges, buildings and other fields because of its advantages of light weight, high strength and corrosion resistance. Among them, the surface coating of FRP bridge is one of the key factors for its anti-corrosion performance. This paper will analyze and analyze the surface coating material, anti-corrosion principle and influencing factors of FRP bridge to illustrate the anti-corrosion performance of FRP bridge.
1. Surface coating material of FRP bridge.
The surface coating material of FRP bridge is mainly divided into two types: resin type and paint type. Among them, the resin type coating has good adhesion, durability and anti-corrosion performance, and the common resin type coating includes epoxy resin, polyester resin, etc.;The paint type coating has good decorative and protective properties, and the common paint type coating includes alkyd resin, chlorinated rubber, etc.
Second, the anti-corrosion principle of FRP bridge.
The anti-corrosion principle of FRP bridge is mainly based on the protective effect of its surface coating. The surface coating can effectively isolate the FRP bridge from the external environment, prevent the invasion of corrosion factors such as moisture, oxygen, and chemical media, so as to avoid the occurrence of corrosion reactions. At the same time, the surface coating also inhibits the electrochemical reaction during the corrosion reaction, thereby slowing down the rate of corrosion.
3. Factors affecting the anti-corrosion performance of FRP bridge.
1.Environmental factors.
Environmental factors are one of the important factors affecting the anti-corrosion performance of FRP bridge. For example, in the marine environment, salt, humidity, temperature, etc. will accelerate the corrosion rate of FRP tray;In the industrial environment, chemicals such as acid and alkali salts can also cause corrosion to the FRP tray. Therefore, when choosing FRP bridge, it is necessary to select the appropriate anti-corrosion coating material and process according to the specific use environment.
2.Manufacturing process.
The manufacturing process is also one of the important factors affecting the anti-corrosion performance of FRP bridge. In the manufacturing process, if the material ratio is improper, the fiber content is uneven, and the surface treatment is improper, it will lead to the decline of the anti-corrosion performance of the FRP bridge. Therefore, it is necessary to strictly control the process parameters in the manufacturing process to ensure product quality.
3.Maintenance.
Maintenance is also one of the important factors affecting the anti-corrosion performance of FRP bridge. In the process of using bridges and buildings, it is necessary to regularly maintain the FRP bridge, including cleaning, rust removal, painting, etc. If there is a long-term lack of maintenance, it will lead to the decline of the anti-corrosion performance of the FRP bridge and accelerate its corrosion rate.
IV. Conclusions. As a new type of building material, FRP bridge has the advantages of light weight, high strength and corrosion resistance, and is widely used in bridges, construction and other fields. The key to its anti-corrosion performance lies in the protective effect of the surface coating, so it is crucial to choose the right coating material and process. At the same time, it is also necessary to pay attention to the influence of environmental factors, manufacturing process and maintenance and other factors in the process of use to ensure the anti-corrosion performance and service life of FRP bridge.