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Hot Dipped Galvanizing

IES is a leading name in the field of hot dip galvanizing in and around Kolkata for its commitment to quality work at competitive rates supplemented with prompt deliveries. Hot dip galvanizing has its application in almost all the industries including power transmission, general construction, petrochemical, petroleum, Structural, construction, Refrigeration, Railway electrification Rural electrification.

Corrosion is destructive result of the chemical action between metal and its environment. It is the process of metal being worn away. If left unprotected, steel will react with surrounding environment and return to its more stable oxide compounds thus consuming the steel in the process.

The most reliable way to protect steel being Hot Dip Galvanizing, is the practice of immersing clean, oxide free iron or steel into molten ZINC in order to form a zinc coating that is Metallurgically bonded to the iron or steel surface.

The Zinc coating process the against corrosion by providing protection to the iron or steel in the following ways

It shields the base metal from the atmosphere

Smooth and high quality coating even on awkward and intricate surfaces. Equally good coating on sharp edges and corners

Further maintenance on site rarely demanded

Hot Dip Galvanizing after fabrication is done as per I.S;2629 : 1985 a 4759; 1984. We are using the purest zinc available on the market (Special High Grade 99.995%)

Coating Requirements
Mass of Zinc Coating - Requirements for the mass of zinc coating as per is for different classes of materials are given below.

S. No.

Fabricated steel articles

Minimum Value of 
Avarage Mass of coatings g/m2

In Microns


5 mm thick and above




Under 5mm, but not less than 2mm




Under 2mm, but not less than 1 .2mm



Note 1
The requirements for the minimum mass of coating are for normal atmospheres. In case of special atmosphere like marine and industrial atmospheres, the minimum mass of coating shall be increased as agreed by the galvanizer and the purchaser.

Note 2
In case of fabricated steel structures, plates, etc. The coating mass is defined in Terms of grams per square meter of the total surface area.

The Galvanizing shall be uniform, smooth, continuous and free from acid spots.