When condensation or rainwater is trapped
between galvanized surfaces, or between a galvanized surface and the ground,
the zinc coating reacts with the water and creates zinc corrosion products that
can form wet storage stain. Since rain, dew, and
condensation contain little or no dissolved salts or minerals, the fresh zinc in
the coating quickly reacts with the moisture to form the zinc corrosion
products zinc hydroxide and zinc oxide. Water, when in a tightly packed
environment, will continue to react with and progressively consume the zinc
coating until the part is removed from this environment or the moisture is
removed its is widely used in industrial pipes manufacturing.
In order to
protect steel for longer period of time a process is being used that is known
as Hot Dip Galvanizing in which a metal
remain in a pool of zinc for some time in order to make a layer of zinc on
outer surface of steel. This layer protects steel from one of the chronic metal
disease that is known as Corrosion. It also increases the Life span of steel and provides it maximum strength. That’s
the main reason that galvanized steel is being used in almost every type of
construction through out the world.
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