Anti-corrosion and surface treatment of steel structure building

The steel structure has become the best building material at present, and steel structure buildings can be seen in many places. However, the surface of the steel structure must be protected against corrosion and surface treatment to ensure the quality and safety of the surface of the steel structure. Let's take a look at the anti-corrosion methods and surface treatment of steel structure manufacturers.

Steel structure corrosion protection method

1. Metal protective layer: The metal protective layer is a metal or alloy with cathode or anode protection. The metal protective layer is formed on the surface of the metal to be protected by electroplating, spray plating, chemical plating, hot plating and infiltration plating ( Membrane) to isolate the contact between the metal and the corrosive medium, or use electrochemical protection to protect the metal, thereby preventing corrosion.

2. Chemical protective layer: chemical or electrochemical methods are used to form a compound film with corrosion resistance on the surface of the steel to isolate the contact between the corrosive medium and the metal to prevent corrosion of the metal.

3. Non-metallic protective layer: Use paint, plastic, enamel, and other materials to form a protective film on the surface of the metal by brushing and spraying to isolate the metal from the corrosive medium, thereby preventing metal corrosion.

Steel surface treatment

After the steel is processed and before it leaves the factory, the surface of the component will inevitably be contaminated with oil, water, dust, and other surface defects, and there will be surface defects such as burrs, scales, and rust. The main reason for the corrosion of the steel structure in the front is that we know that the content of pollutants is an important factor affecting the degree of atmospheric corrosion, and the surface dirt will seriously affect the adhesion of the coating on the steel surface, and the corrosion under the paint film will continue to expand, resulting in The coating fails or is damaged, and the expected protective effect cannot be achieved. Therefore, the impact of the quality of the surface treatment of the steel on the protective effect and life of the coating is sometimes even greater than the difference in the performance of the coating itself, and it should be paid attention to.