I. Corrosion Background in Municipal Engineering

The durability of corrosion resistance in municipal engineering projects has always been an important issue. Most municipal engineering projects are exposed to various natural environments or environments with chemical or physical erosion. Improper corrosion treatment can lead to a reduced service life, and in some cases, result in complete destruction, injuries, significant economic losses, and social impacts. The primary causes of this are poor materials and manufacturing, natural disasters, various traffic accidents, and metal corrosion, which is the main cause.

I. Reference Standards

Current national standards, relevant regulations, and mandatory standard provisions;

"Code for Construction and Acceptance of Building Anti-corrosion Engineering" (GB50212-2002)

"Standard for Corrosion and Rust Removal Levels of Steel Surface Before Coating" (GB8923-1988)

"Safety Regulations for Coating Operations and Safety Management Rules" (GB6514-1995)

"Quality Requirements for Anti-corrosion Coatings" (GB6514-1991)

"Safety Regulations for Coating Operations, Paint Process Safety, and Ventilation Purification" (DJ/T6931-1999)

"Code for Construction and Acceptance of Industrial Equipment and Pipeline Anti-corrosion Engineering" (HGJ229-91)

"Safety Regulations for Coating Operations and Safety of Surface Preparation Process" (GB7692-87)

"Noise Limits at Construction Sites" (GB12523-90)

ISO9001 Quality Management System Documents

ISO14001 Environmental Management System Documents

GB/T28001 Occupational Health and Safety Management System Documents

I. Design Basis

Environmental Conditions: The corrosion level of atmospheric environments on steel structures can be determined according to Table 1.

Corrosion Protection Solution for Gymnasiums

With the successful bid for the 2008 Olympic Games and the 2010 Asian Games, the continuous development of sports in China has led to the construction of gymnasiums in many provinces and cities. Most gymnasiums are built with steel structures, but due to the humid atmosphere and pollution in the environment, steel structures are prone to corrosion, damaging their original aesthetic appeal. To maintain the perfection of these historically significant steel structures and to showcase the artistic charm of steel structures, a heavy-duty anti-corrosion system using both oil-based and water-based coatings is implemented.

Table 1: New Anti-corrosion Coating Solution for Gymnasiums

Table 2: Refurbishment Solution for Gymnasiums

Corrosion in gymnasiums reduces structural safety, increases maintenance costs, and affects the normal conduct of sports activities. Using paint-based anti-corrosion measures can extend the service life of the facilities, improve safety, reduce maintenance costs, beautify the environment, and facilitate daily maintenance.

I. High-speed Railway Station Steel Structure Corrosion Protection Solution

When constructing a new high-speed railway station, steel structure corrosion protection is crucial for ensuring structural safety and prolonging service life. Firstly, suitable high-performance anticorrosive coatings should be selected to form an effective protective layer to resist corrosion agents. During construction, the coating must be applied evenly, avoiding bulging and microscopic cracks, which could lead to rust issues over time. Additionally, strict control over the drying and curing conditions of the coating is necessary to ensure a strong bond between the coating and the steel structure. Furthermore, regular inspections of the coating's integrity and performance should be carried out, and any damaged areas should be repaired promptly to maintain its protective effect. Finally, a reasonable corrosion protection design and construction of the steel structure not only enhance the overall aesthetic of the high-speed railway station but also effectively reduce future maintenance costs, ensuring the safety of railway operations.

A1: MengNeng Coating Recommended Anti-corrosion Solution for High-speed Railway Station Renovation/New Construction

II. High-speed Railway Station Renovation Anti-corrosion Solution

Corrosion and rust in high-speed railway stations seriously affect structural safety, increase maintenance costs, cause service interruptions, damage passengers' travel experience, and reduce environmental aesthetics. Corrosion weakens the load-bearing capacity of steel structures, increasing the risk of structural collapse, while frequent repairs and replacements increase costs. In addition, corrosion limits the functionality of service facilities, affecting normal operations. Using anti-corrosion coatings can prolong the service life of high-speed railway station facilities, improve safety, reduce maintenance costs, and beautify the environment, thus enhancing the city’s image. Coatings form a protective layer on steel surfaces, effectively preventing or delaying corrosion, reducing maintenance frequency, and lowering long-term maintenance costs. High-performance anti-corrosion coatings, such as graphene-modified coatings, form a ‘maze-like’ structure that effectively inhibits the penetration of corrosive agents, enhancing the coating’s impermeability and extending its lifespan.

Table 2: Anti-corrosion Coating Solution for Steel Structure Renovation of High-Speed Train Station

I. New Anti-Corrosion Scheme for Airport Terminal

In recent years, urban construction in China has developed rapidly, and many tall civil and industrial buildings use steel structures, which effectively utilize the advantages of high strength, light weight, good seismic performance, high industrialization, and short construction periods. However, during the construction and use of steel structures, the corrosion of steel is a serious issue that significantly affects the durability of the structures. Steel corrosion can be divided into two types. One is chemical corrosion, which occurs when the surface of the steel reacts chemically with the surrounding environment, and the degree of corrosion increases with time and temperature. The other is electrochemical corrosion, which occurs when oxidation-reduction reactions happen between steel and its surrounding environment during storage and use. Steel structure corrosion is not just rusting of the material, but a complex chemical-physical process, ultimately impacting the structural reliability and economic indicators.

Table 1: Anti-Corrosion Scheme for Airport Terminal

For the anti-corrosion engineering of the steel structures in the airport terminal, it is recommended to use a combination of graphene epoxy zinc-rich primer, epoxy micaceous iron oxide intermediate paint, and fluorocarbon topcoat. This combination can effectively provide corrosion protection while offering good weather resistance and aesthetic appeal. During construction, the steel surface should be sandblasted to Sa2.5 standard to enhance paint adhesion. These measures will ensure effective corrosion protection for the terminal's steel structures, extend their service life, and maintain the aesthetic appearance of the building.

II. Anti-corrosion Solution for Renovation of Airport Terminal

When renovating the airport terminal, the anti-corrosion coating solution needs to consider the following issues: First, the selection of coatings should be based on the terminal environment. For coastal areas, coatings resistant to salt mist corrosion are required. Secondly, surface treatment is crucial, and it must be thoroughly cleaned and achieve the appropriate roughness to enhance paint adhesion. The temperature and humidity of the construction environment will also affect the coating performance, so construction should be carried out under suitable conditions. Fire resistance is a key requirement for public buildings, and the coating must comply with fire safety regulations. Strict quality control during construction is essential to ensure an even and flawless coating. Regular inspections and maintenance are necessary to extend the service life. The selection of environmentally friendly coatings can reduce VOC emissions, in line with green building standards. The coating system should be reasonable, with primer, intermediate, and topcoats working together to ensure anti-corrosion effectiveness. Finally, the paint quantity should be calculated reasonably, considering the theoretical spreading rate and actual loss, to reduce waste. By considering these factors, effective corrosion protection for the terminal steel structure can be ensured, enhancing durability and safety.

Table 2: Anti-corrosion Solution for Renovation of Airport Terminal

Corrosion Protection Plan for the Landscape Tower

The landscape tower, also known as the craft tower or stainless steel tower (due to its outer stainless steel cladding), is a highly practical and iconic structure. When constructing a new landscape tower, it is important to consider environmental adaptability and select appropriate corrosion-resistant coatings that are suitable for the local climate and environmental conditions. The feasibility of construction is also important, ensuring that the coatings are suitable for the application method, such as brushing or spraying. The system of primer, intermediate coating, and topcoat must be合理 to achieve maximum corrosion protection. Surface treatment should be thorough to enhance the adhesion of the coating, and methods such as sandblasting or shot blasting can be used. Material selection should be based on the characteristics of the medium, and care should be taken to avoid stress concentrations or liquid retention in the design. Environmental protection requirements must be followed, and construction waste should be handled properly to minimize environmental impact. Workers must be equipped with personal protective equipment and follow safety technical standards. The coating thickness must meet design and standard requirements, and the total dry film thickness for outdoor coatings should not be less than 150μm. During construction, complete records should be kept to ensure quality. By implementing these measures, the quality of the landscape tower’s corrosion protection project can be ensured, its service life extended, and construction safety and environmental protection maintained.

Table 1: Corrosion Protection Plan for the Landscape Tower