What is Galvanising?
Galvanising a barrier is the process of coating the host steel barrier in a layer of zinc. The barrier is completely submerged in a container of molten zinc. The zinc is heated to a temperature in excess of 450 degrees. Prior to the barrier being immersed in the zinc, it is thoroughly cleaned using an acidic solution to remove any dirt or impurities. The barrier is chemically cleaned to ensure that the galvanising reaction will take place. The process of galvanisation typically takes around 5 minutes once the barrier is in the bath of Zinc (depending on the size of the barrier).
The Benefits of Galvanising
Galvanising an Armco barrier significantly increases its life expectancy. The zinc coating makes the barrier far more resistant to damage and corrosion. Considering the harsh environments that barriers are subjected to, the galvanising is essential in resisting a variety of elements.
As galvanisation only has to take place once and the bond is permanent, the process is very cost effective and requires minimal maintenance once the barrier has been installed. The resilient coating gives the barrier a life expectancy of around 50 years. As the barriers are often installed in motorways and hard to reach places, this is a major benefit.
The resilience of the coating also means that it is hard to damage even when transporting or erecting the barriers. As the barriers often have to be transported over many miles the coating is key to them maintaining their longevity.
Considering the high level of protection the coating provides, the galvanisation process is relatively short. Unlike painting a barrier, the zinc bath where the galvanisation takes place ensures that every part of the object is completely covered. Hand painting a barrier would take far more time, be more expensive and would be far less thorough.
The fast process means that barriers can be manufactured, coated and delivered to customers in a matter of days.