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Introduction
Hot-dipped galvanized steel strip (HDG strip) and hot-dipped galvanized steel sheet (HDG sheet) are two of the most commonly used hot-dipped galvanized products. As its name implies, hot-dipped galvanization involves dipping or coating pieces of steel into a bath of thin, hot zinc. This zinc safeguards the steel from corrosion, and provides long-term protection. While hot-dipped galvanization can be used with both steelstrip and steel sheets, the two products differ in terms of their manufacturing processes and application.
Manufacturing Processes
Hot-dipped steel strip and sheet are manufactured in two distinct processes. Steel strip is first annealed, or softened, and then passed through a series of tanks containing molten zinc. The sheet metal is first annealed and then gently passed through a series of rollers which compress the metal into a flat sheet. There may also be additional treatments applied to the metal before it is finished, such as the galvannealing process which involves a mixture of hot-dipping and annealing to provide superior corrosion protection.
Applications
Hot-dipped galvanized steel strip and sheet are used in a variety of applications across numerous industries. Hot-dipped galvanized steel strip is often used as a reinforcing bar in concrete sidewalks and other structures such as bridges, storage tanks and marine facilities. Hot-dipped galvanized steel sheets are also commonly used to fabricate overhead signs, handrails, conveyors and other outdoor structures.
Hot-dipped galvanized steel strip and sheet can also be found in roofing materials and electrical enclosures, as well as on automobiles, agricultural equipment, and outdoor furniture. The zinc coating on the steel provides extra protection from corrosion and wear, and increases the products longevity.
There are two main grades of hot-dipped galvanized steel: stamped grade and structural grade. Stamped grade steel is most commonly used for general construction applications, while structural grade steel is typically used for load-bearing applications.
Advantages of Hot-Dipped Galvanized Steel Strip and Sheet
Hot-dipped galvanized steel strip and sheet have numerous advantages. The zinc coating protects the steel from corrosion, rust, and other environmental conditions, preserving product life. It also adds to the strength of the steel, making it more robust and less susceptible to wear and tear. Hot-dipped galvanization is also a cost-effective solution, as the zinc coating requires little or no maintenance and provides a long-term return on investment.
Conclusion
Hot-dipped galvanized steel strip and sheet are two of the most cost-effective and reliable steel products available. They offer superior corrosion protection when compared to other types of steel, and require minimal maintenance. This makes hot-dipped galvanized steel strip and sheet an ideal choice for a variety of applications and industries.
