Anti-corrosion and surface treatment for steel factory buildings

Steel structures can be seen in many places. However, the surface of the steel structure must be anti-corrosion and surface treated to ensure the quality of the steel structure surface. So how to carry out steel structure anti-corrosion and surface treatment for steel factory buildings?

Anti-corrosion methods for steel structures

1. Metal protective layer: The metal protective layer is a metal or alloy with cathodic or anodic protection, and forms a metal protective layer on the metal surface to be protected by means of electroplating, spray plating, chemical plating, hot-dip plating and permeation plating ( film) to isolate the contact between the metal and the corrosive medium, or to protect the metal by electrochemical protection, thereby preventing corrosion.

2. Chemical protection layer: A chemical or electrochemical method is 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 metal surface by brushing and spraying methods to isolate the metal from the corrosive medium, thereby preventing the corrosion of the metal.

Steel surface treatment

After the steel is processed and before it leaves the factory, the surface of the component will inevitably be stained with oil, moisture, dust and other pollutants, as well as surface defects such as burrs, oxide scales, and rust layers.

We know from the previous main reasons for the corrosion of steel structures in steel factory buildings that the content of pollutants is an important factor affecting the degree of atmospheric corrosion, and surface dirt will seriously affect the adhesion of paint on the steel surface, and make the corrosion under the paint film continue. Expansion, resulting in failure or destruction of the coating, unable to achieve the expected protective effect.

Therefore, the impact of the quality of steel surface treatment on the protective effect and life of the steel structure workshop coating is sometimes even greater than the performance difference of the coating itself, so it should be taken seriously.