MAXIMUM PROTECTION
AGAINST CORROSION

HOT DIP GALVANISED STEEL SHEET & COIL

The most economical and effective way of protecting steel against corrosion is by way of zinc coating through hot dip continuous galvanising process.

Zinc coating provide protection in two ways:
Barrier Effect and Galvanic Protection Effect.

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Barrier Effect

The zinc coating layer prevents corrosion by sealing off the steel surface from oxygen and corrosive environment.

The protection will last for as long as there is still a layer of zinc coating until it is naturally depleted.

Galvanic Effect

If the coating is accidentally scratched or breached so as to expose the steel, the surrounding zinc then acts as a sacrificial anode and ‘heals the wound’ by corroding instead of the steel, thus delaying the rusting of the steel sheet.

This is called “sacrificial protection”, a type of protection not provided by organic films or other common metallic coatings such as tin or chromium-plating. This is what accounts for the excellent edge protection on sheared hot dip galvanised steel sheet.