Hot - Dip Galvanizing
What Is Hot Dip Galvanizing
Solid industries offers HOT-DIP GALVANIZING Services which prolong the lifetime service of steel poles and related steel structures. Our hot dipped galvanized steel is produced on a state of art, computer controlled production line located in the SITE, Industrial Area of Karachi Pakistan. The best available raw materials and processes are applied under controlled conditions to produce material of high quality.
Hot-Dip Galvanizing is a form of galvanization. It is the process of coating iron and steel with zinc, which alloys with the surface of the base metal when immersing the metal in a bath of molten zinc at a temperature of around 840°F (449°C). When exposed to the atmospheres the pure zinc (Zn) react with oxygen (O2) to form zinc oxide (ZnO), which further reacts with Carbon dioxide to form Zinc Carbonate (ZnCO3), a usually dull grey, fairly strong material that protects the steel underneath from further corrosion in many circumstances. Galvanized steel is widely used in applications where corrosion resistance is needed without the cost of stainless steel, and is considered superior in terms of cost and life-cycle. It can be identified by the crystallization patterning on the surface.
Hot-Dip Galvanizing process
A typical Hot Dip Galvanizing line operates as follows:
1: The steel is pickled in an acidic solution to remove mill scale.
The pickling solution is rinsed off.
2: A flux, often zinc ammonium chloride is applied to the steel to inhibit oxidation of the cleaned surface upon exposure to air. The flux is allowed to dry on the steel and aids in the process of the liquid zinc wetting and adhering to the steel.
3: The steel is dipped into the molten zinc bath and held there until the temperature of the steel equilaterals with that of the bath.
4: The Steel is cooled in a quench tank to reduce its temperature and inhibit undesirable reactions of the newly formed coating with the atmosphere.
Our Hot-Dip Galvanizing Specification
A Hot- dip galvanized is relatively easier and cheaper to specify than an organic paint coating of equivalent corrosion protection performance. The British, European and international standard for hot- dip galvanizing is BS EN ISO 1416, which specifies a minimum coating thickness to be applied to steel in relation to the steels section thickness e.g. a steel fabrication with a section size thicker than 6mm shall have a minimum galvanized coating thickness of 85 μm. Further performance and design information for galvanizing can be found in BS EN ISO 14713-1 and BS EN ISO 14713-2. The durability performance of a galvanized coating depends solely on the corrosion rate of the environment in which it is placed. Corrosion rates for different environments can be found in BS EN ISO 14713-1, where typical corrosion rates are given, along with a description of the environment in which the steel would be used.
Applications of Hot Dip Galvanizing
Construction
We know the significance of steel which provides an effective and efficient framing system for the building envelope. And one of the method which provides a durable and maintenance free system is the hot-dip galvanizing in both interior and exterior elements.
Electrical Appliances
The corrosion resistance is extremely important in all Electrical Appliances and the galvanized coating provides enhanced corrosion resistance which increase the life of those manufactured products. Computer casings and precision instruments are made with zinc coating because it’s moisture- and rust-resistant.
Automotive
At recent stage, all car producers are commonly using zinc coated sheet steel for car bodies. This steel is galvanized before it is cut, pressed, punched, and welded. The galvanizing is a continuous process in which steel strip stays on rollers through the cleaning processes and then move to molten zinc. Cars and aircrafts are large consumers of galvanized steel.
Domestic Appliances
Similar to Electrical Appliances,in all of the domestic appliances, the galvanized coating is specified, galvanized steel sheet should be applied with caution in all those appliances. The service temperature should not be over approximately 500 °F. At 500 °F and higher, hence, the galvanized sheet is designed to provide long service at moderate temperatures.
Hot-Dip Galvanizing Advantages
Long Life
The main advantage of hot-dip galvanizing is its unmatched durability, even in harsh conditions. According to real-world studies and data, hot-dip galvanizing can provide more than 70 years of maintenance free corrosion protection in the most corrosive atmospheric exposure (industrial).
Reliability
One of the advantage of Hot-dip galvanized steel is its reliability. It has no expenses involves in maintenance and can consider as maintenance-free. And also provides positive environmental and economic benefits to future generations.
Complete Coverage
Another advantage of Hot-dip galvanized steel is its complete coverage. It goes with zinc coating that will be perpendicular to the steel, in order to have a common thickness on corners and edges. The total immersion process ensures hollow and tubular structures are coated and protected, inside and out. This complete, uniform coverage means there are no easy targets for corrosion to attack.
Toughest Coating & Long Lasting
Hot-dip galvanizing (HDG) provides double corrosion resistance to steel i.e. cathodic and barrier protection. It isolates the steel from the environment providing basic, barrier protection with high coating strength (about 3600 psi).
Our Hot Dip Galvanized Advantages
Pulvinar accumsan lacus accumsan. A expedita laudantium, habitant maiores voluptatum massa curae, senectus distinctio porro distinctio necessitatibus iste.
Long Life
Click edit button to change this text. Lorem ipsum dolor sit amet consecte.
Complete Coverage
Click edit button to change this text. Lorem ipsum dolor sit amet consecte.
Low Maintenance Cost
Click edit button to change this text. Lorem ipsum dolor sit amet consecte.
Reliability
Click edit button to change this text. Lorem ipsum dolor sit amet consecte.
Toughest Coating & Long Lasting
Click edit button to change this text. Lorem ipsum dolor sit amet consecte.
Three Way Protection
Click edit button to change this text. Lorem ipsum dolor sit amet consecte.
Plant & Equipment
- Zinc Kettle (0.8m X 1.4m X 10.5m) in length.
- EOT overhead crane with three 5 TON capacity hoists each.
- Mobile Material handling system.
- GAS fired furnace with auto temperature control system & high speed Burners.
- Yard Material handling System.
