Hot-Dip Galvanizing of Structures and Pipes
Strona główna / Usługi
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Galvanizing
Hot-dip galvanizing is one of the most effective and durable methods of protecting steel against corrosion. Impostal provides this service in accordance with the PN-EN ISO 1461 standard, ensuring a complete metallic zinc coating on both the external and internal surfaces of steel elements – including pipes, hollow sections, and advanced structures. As a result, galvanized steel remains corrosion-resistant for several decades.
Why choose hot-dip galvanizing?
Hot-dip galvanizing not only protects steel from rust but also enhances its operational durability. A high-quality zinc coating is created by fully immersing the elements in molten zinc at a temperature of around 450°C. This process forms a zinc–iron alloy layer that is resistant to mechanical damage and atmospheric conditions, making it ideal for structures operating in demanding environments.
Key benefits:
long-term corrosion protection without the need for maintenance,
uniform coverage of even hard-to-reach areas,
high resistance to mechanical damage,
cost-effectiveness compared to repeated anti-corrosion painting,
increased durability of steel structures in all conditions.
Hot-dip galvanizing process
To achieve the highest-quality coating, elements intended for galvanizing require proper preparation. The chemical composition of the steel and the correct placement of venting and drainage holes enabling free zinc flow are crucial—especially for closed sections such as pipes and profiles.
The process consists of several precisely controlled stages:
The elements undergo degreasing, pickling, and rinsing to remove contaminants and rust. This ensures that the zinc coating bonds permanently with the substrate.
The elements are immersed in a flux bath, which prevents oxidation of the steel surface before galvanizing.
At approximately 450°C, a reaction occurs that forms a zinc–iron alloy coating. This coating is not simply applied on top—it becomes an integral part of the metal, which ensures exceptional durability.
After removal from the bath, the elements are cooled and thoroughly inspected for coating thickness and uniformity.
Professional preparation of structures for galvanizing
For the process to run correctly, proper design and placement of venting holes are essential, especially when galvanizing pipes and closed profiles. Impostal provides detailed guidelines for proper structural preparation and offers technical support at every stage.
Choosing the right type of steel also matters—an unsuitable chemical composition can affect the thickness and structure of the coating. Our technical department helps analyze material documentation and recommends optimal solutions.
If you need long-lasting protection for steel structures, pipes, or profiles, hot-dip galvanizing at Impostal is an investment in decades of reliability and corrosion resistance.
