What Is Galvanizing And Why Is It important
by Stive Smith BusinessThe process of Galvanizing consists of applying a
protective zinc coating over metal, like steel or iron. This prevents corrosion
and rusting and maintains the appearance of the metal. The most commonly used
methods for producing galvanized metal are hot dip galvanization and cold Galvanizing.
During hot dip galvanization, the metal to be treated is immersed in molten hot
zinc, and the zinc forms a permanent, protective barrier over the metal. The
process of cold Galvanizing gets the same outcome, by painting a layer
of zinc rich paint onto the metal. Rather than the metal being exposed to the
elements, the zinc in the paint reacts with air and water instead. of the steel
beneath it. Both hot dip galvanization and cold Galvanizing are
types of cathodic protection – the use of zinc being applied to the steel
surface to shield it from water and air.
Rust cannot get underneath the protective zinc layer, and even if the object is
scratched, the surrounding zinc layer and build-up of zinc corrosion will
protect the object. Galvanizing metal also allows the structure to take
more heat and stress than non-treated metal.
While both hot and cold methods are very effective forms of protection, they
both eventually degrade in a similar way – a white-grey powder will form on the
surface as the zinc layer breaks down. However re-treatment is a quick and
simple process. Old galvanized metal can easily be repaired and restored with a
light abrasion of the surface. This will remove rust and zinc corrosion and
result in a smooth surface.
The amount of zinc in the protective layer is very important for galvanized
metal. If an inferior product is used that contains little zinc, there will be
no cathodic protection and the metal will be exposed to the elements, resulting
in corrosion and loss of functionality. High levels of zinc concentration will
increase the lifespan of the equipment, so it is important to find a formula
that contains over 90% zinc.
Marine and salty environments contribute to corrosion, so metal protection is
very important in coastal areas. Most major Australian cities are build around
the coastline, so Australians spend a lot of time and effort preventing
corrosion. If there is salt on the road in cold environments, it can damage
steel car frames. While corrosion is inevitable, galvanized metal will continue
to be effective and last a long time if properly maintained.
Galvanizing is mainly used in industrial settings to protect metal
structures, but it can also be used in the home particularly when working with
outdoor furniture. Not only does it protect the metal, it gives a smooth,
attractive finish. Galvanized metal is also found in steel frame houses, on the
roof, in cars and boats.
Galvanization is an excellent method for protecting metal and there are
relatively few disadvantages to using this method. It is fairly inexpensive and
equipment can easily be re-treated. If objects are too large, they might not be
able to be hot-dipped, but there are other galvanization methods that can be
used. Galvanized metal provides peace of mind and increases the lifespan of
equipment, resulting in less maintenance and fewer costs for the owner.
Richard Gardiner’s extensive experience as a Galvanizing
technician and machine operator gave him such a solid understanding of the
industrial Galvanizing process, he decided to start his own company
offering Galvanizing services to small businesses and DIYers. He
loves nothing more than helping his customers protect their labours of love
with the proper corrosion protection.
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Created on Dec 31st 1969 18:00. Viewed 0 times.