3. Why should the surface of steel products be hot galvanized?

Steel is highly susceptible to corrosion in air, water, or soil, which can lead to complete deterioration. Annually, corrosion-related steel losses account for approximately one-tenth of total production. Therefore, protective coatings are essential to shield steel from corrosion. Hot-dip galvanizing stands as a key solution. Zinc remains stable in dry air but forms a dense alkaline zinc carbonate film in humid environments, effectively preventing internal corrosion. When the galvanized layer is compromised and exposed steel surfaces are exposed, the zinc layer creates micro-electrochemical cells where the steel acts as the cathode. Zinc's atmospheric corrosion rate is 1/15th that of steel, indicating significantly longer durability. Moreover, zinc's cost-effectiveness compared to other corrosion-resistant metals makes hot-dip galvanizing an economically viable and durable solution.