General Information

Hot-dip galvanizing is the immersion of steel structures (after pre-treatment) in a bath with molten zinc at about 450 ° C.  As a result we get the protective coating of zinc, with a given thickness that easily to check. The thickness of this coating, depends on your needs, from 70 to 120 mm (in some cases, these figures may be exceeded).

The average corrosion rate varies from 9 mm to 0.85 mm per year.  That’s why we can see the benefits of hot dip galvanizing for the medium or long term, compared to any other protective methods.

A considerable duration of protection depends on the unique characteristics of hot-dip galvanizing process.  Actually, it's a real alloy which is formed between iron and zinc, but not the simple coating or electrolytic zinc adhesion to the product.

Process protects against rust and improves some of its characteristics (aesthetic appearance, greater resistance to wear), which increases the endurance limit in relation to chemical and mechanical influences.

For example, if the steel exposed in the case of a deep incision, the surrounding zinc will ‘sacrifice’ itself. It will corrode instead of steel and form a corrosion product with the effect of the sealant.

In addition, hot-dip galvanizing allows controlling visually the condition of individual components or entire structures. Just compare other forms of protection, such as paint. It can also mask the damage caused by rust that also can cause a serious danger in the future.

In a particularly difficult environments you can resort to a double protective coating (dual system). This method consists in color of the object after galvanizing. So, the duration of protection becomes longer than the sum of the both types processing durations.