What Anti-corrosion Measures Can Be Taken To Cover The Sewage Tank Membrane?

The membrane cover of the sewage tank adopts the principle of reverse suspension of the membrane material, and the steel structure is as the outer layer of the membrane material, thereby extending the service life of the steel structure. The corrosion of the steel structure by the exhaust gas in the sewage tank is fundamentally avoided. So what measures can we take?

1. Cathodic protection method: Adding more active metal to the surface of steel structure to replace steel corrosion. Often used in underwater or underground structures.

2. Hot-dip galvanizing: Hot-dip galvanizing has long durability, high degree of industrialization and stable quality. Therefore, it is widely used in outdoor steel structures that are severely corroded by the atmosphere and difficult to repair, such as a large number of power transmission towers, communication towers, etc. In recent years, a large number of profiled steel plates in light steel structural systems have also been used more hot-dip galvanized to prevent corrosion. Hot-dip galvanizing is carried out at high temperature. For tubular members, both ends should be open. If the two ends are closed, the air in the pipe will expand and the head plate will burst, thereby causing a safety accident.

3. Coating method: A high-quality coating depends on thorough derusting. At present, the commonly used fluorocarbon coatings can prevent corrosion for up to 50 years. Therefore, it is often used for indoor steel structures or outdoor steel structures that are relatively easy to maintain. The first step of the coating method is to remove rust. Therefore, sandblasting is generally used to remove rust for high-demand coatings to expose the metal luster and remove all rust and oil stains. The on-site coating can be manually derusted.