Benefits Of Hot-Dip Galvanizing
Steel alloy consisting mostly of iron and when the iron comes in contact with oxygen to form iron oxide or rust. Steel is used in a number of things today. It is used to construct buildings, infrastructure, automobiles, ships, machinery, equipment and more.
The steel to rust discoloration and if an object is allowed to rust for a long time, there is a gradual deformation in the shape of the object. There are many ways to prevent the steel from corrosion such as electroplating and zinc coating.
‘Galvanizing’ (Also known as ‘ชุบสังกะสี’ in the Thai language) is one option that is widely used for industrial purposes. Painting is another way to prevent rust and is used mostly on cars, appliances and sometimes even on the building. Metallizing is another expensive process in which zinc is sprayed onto the steel.
Galvanizing is one of the most common ways of preventing corrosion and is widely used today. But sometimes when galvanizing objects, especially at the surface is scratched, zinc or tin is not attached to it seems, holes or joints of an object.
Hot-dip galvanizing is done with zinc bonds to steel at a molecular level. This allows the coat to migrate to cover the entire surface including scratches, joints, and even holes.
Hot-dip galvanizing includes not only steel with zinc coating, but it involves a process in which there are four layers used in covering the steel base.
The first three layers that are used are zinc-iron alloy and the fourth is pure zinc. Zinc-iron alloy increases the strength of steel and the final layer of pure steel to prevent corrosion forms.
The reason behind the use of zinc is that zinc is a sacrificial anode that has a more negative electrode potential of the steel. This means that zinc will sacrifice himself to prevent corrosion of steel.
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