Steel is a mainstay in modern construction and has been since the beginning of the industrial revolution. All the Construction and Infrastructure professionals trust the strength and durability steel provides; but once the steel is exposed to the environment, it begins to corrode. Hot dip galvanizing protects steel from corrosion due to a metallurgical bond that occurs when steel is submerged in molten zinc. The reaction creates intermetallic layers, harder than the base steel itself, resulting in an extremely abrasion resistant coating that can last for decades.
The galvanizing plant is equipped with High Velocity Galvanizing Furnace Fired Hot - Dip Galvanizing Plant, Progressive Dp capacity of 6.5Mtr. x 1Mtr. x 1.4Mtr. It is equipped with heat pumping unit, flame proof - type flow heater, self-proportioning burner, centrifugal blowers and heat resisting cover with pickling, rinsing, pre-fluxing & quenching (running water) tank, and Zinc kettle, ensuring quality of the products that conform to the International Standards.
The pre-treatment of steel is effectively handled with chemicals to minimize effluents. The control treatment includes degreasing, pickling and fluxing for an ideal reaction between Steel and Zinc.
The pre-heating chamber ensures uniform drying and pre-heating of steel to have an excellent surface finish and uniform coating of zinc. The temperature of galvanizing furnace is accurately controlled by an automatic digital temperature meter and Zinc.
The Zinc used is of special high grade (SHG) with 99.99% Zn Purity confirming to ASTM B6-SHG, Grade Z13001 & ISO 752:2004, Zn Grade
For high quality hot-dip galvanizing, steel must be properly prepared prior to being immersed in a bath of molten zinc. During the surface preparation stage, material going through degreasing/caustic cleaning, pickling, and fluxing.
Degreasing: Acid base degreasing removes contaminants from the steel such as dirt, grease and oil.
Pickling: To remove mill scale and iron oxides, the steel goes through a diluted solution of ambient hydrochloric acid.
Fluxing: Through the final surface preparation step, any remaining oxides are removed in a zinc ammonium chloride solution and a protective layer is deposited on the steel to prevent any further oxides from forming prior to galvanizing.
Following surface preparation, the steel will be immersed in a bath of molten zinc. The zinc kettle contains at least 98.5% pure zinc and is maintained at a temperature between 815º-850º F (435º-455º C). While steel is immersed in the kettle, the zinc reacts with the iron in the steel to form a series of metallurgically bonded zinc-iron alloy layers with the final top layer 100% zinc.
With an in-house testing facility, QC Lab, the product is assured of quality and compliance to local Specifications and international standards. Our trained inspectors, periodic maintenance check-ups of machines, system upgrades and a streamlined production flow-chart enable us to offer products and services par excellence.
