What are the commonly used anti-corrosion treatment methods for Steel Truss and how effective are they?

As a key structure in modern building and infrastructure construction, the durability of Steel Truss is crucial to the safety and service life of the project. Due to long-term exposure to the environment, steel trusses are susceptible to erosion by moisture, oxygen and pollutants, leading to corrosion problems. Effective anti-corrosion treatment methods can significantly extend the service life of steel trusses and reduce maintenance costs. In practical applications, different anti-corrosion treatment methods have their own characteristics and effects.
A widely used anti-corrosion treatment method is hot-dip galvanizing. By immersing the steel truss in molten zinc liquid, a dense zinc layer is formed on its surface. This zinc layer not only blocks the contact of moisture and oxygen, but also delays the occurrence of corrosion through its own electrochemical protection when the zinc layer is damaged. Hot-dip galvanized steel trusses have excellent weather resistance and are suitable for high humidity or salt spray environments, such as bridge construction in coastal areas or chemical plant equipment. The thickness of the hot-dip galvanized layer is usually large, which can provide anti-corrosion protection for more than 20 years.
Another common method is spraying anti-corrosion coatings. Such coatings usually include epoxy coatings, polyurethane coatings and fluorocarbon coatings. Epoxy coatings are widely used for their excellent adhesion and chemical resistance and are suitable for use in industrial facilities and underground structures. Polyurethane coatings are often used for the protection of outdoor steel structures due to their strong wear resistance and UV resistance. Fluorocarbon coatings are suitable for high-end construction projects due to their super durability and anti-fouling properties. Anti-corrosion coatings can be selected in different types and coating thicknesses according to actual needs. Their flexibility and diversity make this method very popular.
Metal spraying technology is also an efficient anti-corrosion treatment method. This method heats metal materials (such as aluminum, zinc or their alloys) to a molten state and sprays them onto the surface of the steel truss to form a uniform metal coating. Metal spraying not only provides excellent anti-corrosion protection, but also enhances the wear resistance of the steel truss. This method is particularly suitable for heavy industrial fields, such as offshore platforms or mining equipment, which need to resist corrosion in harsh environments.
For specific highly corrosive environments, cathodic protection technology can also be used. This method connects a more corrosive sacrificial anode (such as magnesium or aluminum) to the steel truss to make it corrode preferentially to protect the steel structure. This protection method is widely used in marine engineering, underground pipelines, storage tanks and other occasions. When used in combination with other anti-corrosion treatment methods, it can achieve a longer-lasting protection effect.