Hot-dip galvanising is a simple but effective way to protect steel from rust. The process involves cleaning the metal and dipping it into molten zinc.
Here is a clear step-by-step look at how it works.
Step 1: Degreasing
Steel is cleaned to remove dirt, oil, and grease. This helps prepare the surface for the next steps.
Step 2: Pickling
The metal is placed in a chemical solution to remove rust and scale. This exposes clean steel for better zinc bonding.
Step 3: Rinsing
The steel is rinsed to wash off any leftover chemicals.
Step 4: Fluxing
Flux is applied to prevent oxidation before dipping. This ensures the zinc sticks well to the steel.
Step 5: Zinc Bath
The steel is dipped into a bath of molten zinc at about 450°C. The zinc reacts with the steel and creates a protective coating.
Step 6: Cooling
The steel is removed from the bath and cooled. The zinc coating hardens into a strong, protective layer.
Step 7: Inspection
The steel is inspected to make sure the coating is even and meets quality standards.
Why This Process Works
This method creates a close bond between zinc and steel. The coating protects the metal from rust and weather damage.
Final Thoughts
Hot-dip galvanizing is trusted because it is simple, strong, and effective. With the right steps and quality standards, steel can remain protected for decades.
