Hot-Dip Galvanizing and Corrosion Protection
Coating weight is the specification clause that most often decides whether barrier passes inspection. It is also the one most easily cut by a supplier working to a price. Hongda operates its own galvanizing workshop, which is what makes the coating weight a controlled process rather than something bought in from a subcontractor and hoped for.
How It Works End to End
Why Coating Weight Matters
Guardrail sits exposed at the roadside for its whole service life. The zinc layer is what stands between the steel and the weather, so the coating weight written into the tender is the number the inspector measures on delivery.
The Specification We Work To
On W-beam, thrie-beam, flex beam and box beam the source specification is a zinc coating of 550 g/m2, which measures around 80 microns.
In-House Galvanizing
Sections are hot-dip galvanized in our own galvanizing workshop. Keeping the bath in house means the coating weight is controlled by us rather than by a third party working to their own schedule.
Passivation
The passivation ratio is controlled precisely so that the galvanized surface resists corrosion. This is applied to posts, terminals, curved sections and buffers alike.
Inspection
Coating thickness is checked after galvanizing against the requirement for the order, alongside section dimensions and hole pattern.
Environmental Handling
Hot-dip galvanizing generates harmful wastewater. We operate our own wastewater treatment station and environmental treatment equipment to reduce it, alongside a wastewater treatment workshop on site.
From the Works
What You Get
- Zinc coating of 550 g/m2, around 80 microns, on the main beam products
- Galvanizing carried out in our own workshop, not subcontracted out
- Passivation ratio controlled precisely for corrosion resistance
- Coating thickness checked after galvanizing as part of inspection
- On-site wastewater treatment for the effluent galvanizing produces
Hot-Dip Galvanizing and Corrosion Protection Questions
What zinc coating weight do you apply?
Is galvanizing subcontracted?
How is the galvanized surface passivated?
Can you galvanize to a different coating weight?
How do you handle galvanizing wastewater?
Talk To Us About Your Project
Send the specification, quantity and destination and we will come back with a quotation for the complete scope.