Hot Dip Galvanizing

Hot Dip Galvanization

Hot-dip galvanization 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 449 °C (840 °F). When exposed to the atmosphere, the pure zinc (Zn) reacts with oxygen (O2) to form zinc oxide (ZnO), which further reacts with carbon dioxide (CO2) 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 (often called a "spangle").Galvanized steel can be welded; however, one must exercise caution around the resulting toxic zinc fumes. Galvanized fumes are released when the galvanized metal reaches a certain temperature. This temperature varies by the galvanization process used. In long-term, continuous exposure, the recommended maximum temperature for hot-dip galvanized steel is 200 °C (392 °F), according to the American Galvanizers Association. The use of galvanized steel at temperatures above this will result in peeling of the zinc at the inter metallic layer[citation needed]. Electrogalvanized sheet steel is often used in automotive manufacturing to enhance the corrosion performance of exterior body panels; this is, however, a completely different process which tends to achieve lower coating thicknesses of zinc.Like other corrosion protection systems, galvanizing protects steel by acting as a barrier between steel and the atmosphere. However, zinc is a more electropositive (active) metal in comparison to steel. This is a unique characteristic for galvanizing, which means that when a galvanized coating is damaged and steel is exposed to the atmosphere, zinc can continue to protect steel through galvanic corrosion (often within an annulus of 5 mm, above which electron transfer rate decreases).

Jame merik galvanization unit

This unit is able to serve hot galvanized services of all metal structures by utilizing international standards of ASTM, EN along with using full equipment and presentation of quality guarantees capacity of producing products in 25,000 tones annually.   This unit contains the potentials of supplying and distributing all water, industrial and greenery pipes in all size and shapes in dark and galvanized forms. The equipments of hot galvanized unit:
 -Equipped chemical laboratory for controlling the quality of products. 
-Washing, Preparing and pre-hot. 
-Hot tube made in PILLING Germany companies in 700*120*150 cm. 
-The most modern control and temporal devices. 
-Research and Develop units. -Packing and finishing units.  

واحد گالوانیزه گرم جامع مریک

The chemical unit of this company controls the pickling operation process in hot galvanized parts by utilization of professionals about production of consuming materials which leads to improving the quality of parts and differentiation to other competitors.Merik’s chemical unit has the full supervision on the hole washing operation process in the Hot Dip Galvanizing line by utilizing experts in the field of Pickling’s consuming materials production, which leads to best segments production quality & also makes us the best in comparison with the others.Services:

  -        All galvanized pipe and profiles in different shapes and size from 1 inch up .

  -        Hot Dip Galvanizing kettle, made by Pilling Germany; Dimensions : 700*120*150 (cm) 
  -        All galvanized Mannesmann pipes in different shape and sizes.

  -        All galvanized transmission power, telecommunication and telescope towers.

  -        All galvanized equipments and required metal structures in refinery, petrochemical and                           powerhouse industries.

   -        All galvanized power tower equipments, all light base, all metal in-road structures.

   -        All galvanized steel networks, cables, ladder and any other steel structures.

   -        Offering consultant in designing and mounting hot galvanized line in different capacities.