Correct Answer - Option 4 : Zinc
The correct answer is Zinc.
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Galvanisation is a method of protecting steel and iron from rusting by coating them with a thin layer of Zinc.
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The galvanizing process consists of three steps
- Surface preparation
- Fuxing
- Galvanizing
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Galvanization
- Galvanization is the process of applying a protective layer of zinc to a metal.
- It is a very common method of preventing the rusting of iron.
- This can be done by dipping the metal to be protected in hot, molten zinc or by the process of electroplating.
- The protection of iron and steel from corrosion by coating with molten zinc.
- The zinc coating protects from the atmosphere the part’s surface, avoiding corrosion and weathering.
- Material is loaded onto jigs before being immersed in molten zinc at about 450 degrees until the working temperature is the same as zinc.
- During this process, the molten zinc reacts to a series of zinc/iron alloys with the steel surface.
- Galvanization helps extend the life of steel parts by forming a membrane between the metal and the air, preventing the accumulation of iron oxide on the steel layer.
- Galvanization also offers superior corrosion resistance to environmentally exposed parts.
