Anti corrosion treatment of steel structure

Anti corrosion treatment of steel structures is a key measure to ensure their long-term stability and service life. The following is a detailed analysis of anti-corrosion treatment for steel structures:
1、 The importance of anti-corrosion treatment
Steel structures exposed to air for a long time are susceptible to corrosion from oxygen, moisture, and corrosive substances, leading to surface rusting and corrosion of the steel, and may even cause structural safety issues. Therefore, anti-corrosion treatment of steel structures is crucial.
2、 Common anti-corrosion treatment methods
Hot dip galvanizing anti-corrosion method
Principle: Immerse steel structural components in molten zinc solution to form a layer of zinc on the surface of the steel, thereby isolating the steel from contact with corrosive media.
Features: Good anti-corrosion effect, long durability, suitable for steel structures under various environmental conditions, especially outdoor steel structures that are severely corroded by the atmosphere.
Painting and anti-corrosion method
Principle: Apply anti-corrosion coating on the surface of the steel structure to form a protective film, preventing the invasion of corrosive media.
Features: Easy to construct, low cost, suitable for indoor steel structures or relatively easy to maintain outdoor steel structures. The selection of coatings should be determined based on specific environmental conditions and usage requirements.
Arc spraying anti-corrosion method
Principle: Metal materials are melted and sprayed onto the surface of steel structures using arc spraying equipment, forming a dense anti-corrosion coating.
Features: Good anti-corrosion effect, strong adaptability to component size, suitable for steel structural components in water and underground.
Use weather resistant steel
Principle: Weathering steel is a type of steel with better corrosion resistance than general structural steel. It contains metal elements such as phosphorus, copper, nickel, chromium, and titanium, which can form a protective layer on the metal surface and improve corrosion resistance.
Features: Good low-temperature impact toughness, suitable for steel structures with special requirements for low-temperature performance.
Thermal spray aluminum (zinc) composite coating
Principle: First, sandblasting and rust removal treatment is carried out on the surface of the steel component. Then, the aluminum (zinc) wire is melted and sprayed onto the surface of the steel component using the heat source of the thermal spraying equipment, forming a honeycomb shaped aluminum (zinc) spray layer. Afterwards, the capillary pores are filled with paint to form a composite coating.
Features: Good anti-corrosion effect, strong adaptability to component size, but low industrialization level, high labor intensity.
3、 Key points of anti-corrosion treatment construction
Surface treatment: Before anti-corrosion treatment, the surface of the steel structure needs to be thoroughly cleaned and rust removed to ensure good adhesion between the coating and the steel surface.
Coating selection: Choose the appropriate anti-corrosion coating or anti-corrosion method based on specific environmental conditions and usage requirements.
Construction quality: Strictly follow the construction specifications and standards to ensure the uniformity, adhesion, and durability of the anti-corrosion layer.
Regular inspection and maintenance: Regularly inspect and maintain the anti-corrosion coating of steel structures to promptly identify and address potential safety hazards.
In summary, anti-corrosion treatment of steel structures is an important measure to ensure their long-term stability and service life. In the process of anti-corrosion treatment, suitable anti-corrosion methods and coatings should be selected according to specific environmental conditions and usage requirements, and operations should be strictly carried out in accordance with construction specifications and standards.