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Hot-dip galvanizing or  simply Galvanizing  is the process of immersing iron or steel in a bath of molten zinc to produce a corrosion resistant, multi-layered coating of zinc-iron alloy and zinc metal. 

While the steel is immersed in the zinc, a metallurgical reaction occurs between the iron in the steel and the molten zinc.  This reaction is a diffusion process, so the coating forms perpendicular to all surfaces creating a uniform thickness throughout the part. 

 

The hot-dip galvanizing process provides long-lasting, maintenance-free corrosion protection at a reasonable cost. Although hot-dip galvanizing has been utilized to protect steel for generations, the galvanizing process continues to evolve with new technologies and creative chemistries. 

The three main steps in the hot-dip galvanizing process are surface preparation, galvanizing, and post-treatment. The process is inherently simple, which is a distinct advantage over other corrosion protection methods. 

Answer

option D that is Zinc is the correct answer and the process of coating is called Galvanisation.

Answer

iron is coated wit zinc to prevent it from rusting because zinc is more reactive than iron so when galvanised iron is exposed to moisture and oxygen it reacts with oxygen before iron.in this way iron is protected. the process of zinc coating is called galvanisation

 

Answer

Zinc

The process is called Galvanisation

 

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