Hot Dip Galvanizing is a process in which an adherent, protective coating of zinc and zinc compounds is developed on the surfaces of iron and steel products by immersing them in a bath of molten zinc. Hot dipping is a process in which a metal substrate is immersed in a molten bath of a second metal. After removal, the second metal is coated into the first. It is essential to have higher melting temperature of first metal than the second. The most common substrate metals are steel and iron and the common coating materials are zinc, aluminium, tin and lead. Prior to coating, cleaning of rust, scale, oil, paint and other surface contaminants is required. For coating process, immersion in the molten metal is done for periods ranging from a fraction of a minute for small objects like fasteners to several minutes for large scale structures. Temperature of approximately 450°C and 700°C need to be maintained (bath temperature) for galvanizing (zinc coating) and aluminium coating respectively.
Steel manufacturing output of India is expected to increase from 88.4 million tons (MT) in 2017 to 128.6 MT by 2021, accelerating the country’s share of global steel production from 5.4% in 2017 to 7.7% by 2021. India is the second-largest crude steel producer in the world. In FY17, India produced 111.254 million tons (MT) of finished steel. Total finished steel production in the country increased at a CAGR of 8.39 per cent over FY12-17. Crude Steel and Finished Steel production during April-October 2017 stood at 66.70 MT and 76.36 MT, respectively. Driven by rising infrastructure development and growing demand for automotives, steel consumption is expected to reach 104 MT by 2017. India’s steel production is expected to increase from 97.42 MT in FY17 to 128.6 MT by 2021. Thus, due to demand it is best to invest in this project.
Few Indian major players are as under
· Aravali (India) Ltd.
· Arun Pipes Ltd.
· Ashapura International Ltd.
· Ashapura Minechem Ltd.
· Assam Roofing Ltd.
· Bedmutha Industries Ltd.
· Bharat Berg Ltd.