According to the international standard of BS EN ISO 1461 which is essential for premium-quality hot dip galvanized products. Using zinc protects steel from corrosion which is caused by the inherent tendency of metals, when subjected to air and moisture. The Galvanized materials are protected against corrosion and its durability ranges over 25 years.
Hot dip galvanizing has been in use for more than hundred years and has proven to be the best method of corrosion protection for iron and steel. The harsh weather and environment conditions in the Arabian Gulf with its high humidity and salt contents make hot dip galvanizing an ideal solution for corrosion protection for any iron and steel structures.
The hot dip galvanized coating uniquely provides both barrier and cathodic protection to the steel. Galvanizing protection is superior to other barrier coatings, such as fusion bonded epoxy (FBE), in the formation of a permanent bond with the steel. The molten zinc interlocks with the steel forming zinc-iron layers and creating a true metallurgical bond. Other barrier coatings rely on surface adhesion of the coating material to the steel. Zinc has a higher electro-potential than steel. The zinc migrates to bare areas, such as scratches or drill holes to provide corrosion protection of the base steel. The malleable outer zinc layer of the coating provides outstanding impact resistance to the galvanized coating. The hardness of the zinc-iron alloy layer is greater than the base steel and delivers exceptional resistance to coating damage due to handling. Hot-dip galvanizing has a proven history of commercial success as a method of corrosion protection in numerous applications worldwide.
The Process involved in Hot Dip Galvanizing:
- Pickling with HCL acid
- Hot Dip Galvanizing
- Passivation (Optional)