What Is Hot Dip Galvanizing?
Hot dip galvanizing is a plating process where materials are immersed in molten zinc. This technique is primarily used for its rust protection capabilities. An important advantage of hot dip galvanizing is its cost-effectiveness due to the simplicity of the process.
Uses of Hot Dip Galvanizing
Widely used for its affordability and durability, hot dip galvanizing can protect materials from rust for about 10 years, even in environments exposed to sea breezes. Common applications include construction machinery, station buildings, public facilities, and guardrails. It’s also employed in structures that are challenging to maintain regularly, such as steel towers in remote locations, helping to control maintenance costs.
Principles of Hot Dip Galvanizing
Hot dip galvanizing is characterized by the strong adhesion strength resulting from the chemical reaction between zinc and iron. This alloying reaction ensures that the coating does not peel off easily under normal conditions, unlike conventional paints. Additionally, zinc offers both a protective coating action and sacrificial anticorrosion. It acts as a protective film resistant to water and air, while also providing sacrificial corrosion protection by dissolving before the underlying material. The process results in a thick zinc coating, offering long-term protection due to the dual action of zinc.