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Galvanization
- Plant’s Origin and Description
- Definition and importance of Hot Dip-Galvanizing Process:
Plant’s Origin and Description
- Our plant was established in December 2020 on area 10,000 square meter with the latest technology in the world by Ani-Metal which is one of the leading galvanizing plants suppliers in the world.
- Our Galvanizing kettle’s dimensions are 9 meters tall, 1.6 meters wide and 3.6 meters depth, to be the deepest kettle in Egypt and the Middle East with production capacity 45,000 ton/year.
- Now, we provide the hot dip-galvanizing service (Built up sections, poles, gratings and pipes, etc.) to a wide a range of clients all over Egypt.
Definition and importance of Hot Dip-Galvanizing Process:
- It is the process of dipping iron or steel into a bath of molten zinc at a temperature between 445-455 Celsius.
- It produces corrosion resistant multi layers that consist of zinc-iron and pure zinc which resulted from a metallurgical reaction between steel and molten zinc.
- These layers give the iron/steel a very good resistance to corrosion in harsh environments and mechanical damages.
- It gives the products a very good appearance, corrosion resistance with the lowest possible cost.
Galvanization Steps
Step 1
Receiving the black steel from the client, inspecting and preparing for loading.
Step 2
Steel Pre-treatment (surface preparation).
- In this step the steel is prepared to be free of oil, rust and other contaminations that may inhibit the reaction between the molten zinc and iron during the galvanizing process.
- The steel is firstly immersed in the acidic oil degreasing tank to remove the organic contaminations such as dirt, oil and grease from the steel surface.
- Next, the steel is pickled in diluted hydrochloric acid that removes rust and oxides residues from the steel surface.
- Finally, the steel rinsed then is immersed in the flux tank which is a double salt (Ammonium chloride and zinc chloride) that creates a thick protective layer to protect the steel from oxidation during the drying process
Step 3
Hot dip-galvanizing process.
Step 4
Inspection and unloading.
- Once the product is cooled (by quenching and passivation). The quality inspector checks the galvanizing coating thickness according ISO DIN-1461 & ASTM A-123 using the DFT device then checking the products’ visual to guarantee the absence of excessive bare spots, zinc spikes and any other galvanizing defects.
- Once the product is accepted, the unloading process is performed and the product is sent to the finishing area to remove the zinc spikes and treat the small bare sports according to ASTM A-780.
- Finally the product is checked by the quality inspector to be ready to storing or dispatching to the client.
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