Hot-dip galvanizing

Hot dip galvanizing is the leading method which protect the prepared metal and steel structures

 from atmospheric, water and soil corrosion. Over 150 years zinc is used as material for

 protection against corrosion. Every year the world produced millions tons of zinc. Half of this

 is used to protect steel from rust. Also using other metals, including magnesium, aluminum,

 cadmium.

Coating thickness is 60 -100 microns (depending on the thickness and chemical composition of

 steel from which the product is manufactured). Zinc cladding is a barrier which protects the

 surface from the environment. However, except barrier, zinc also provides electrochemical

 protection, because the osculation with iron galvanic cell is formed. Other anti-corrosion

 system or create a protective barrier or galvanic cell. Only hot-dip galvanizing combines these

 two methods into one, creating an effective method that protects steel for many years. The

 service life of galvanized metal is from 20 to 65 years depending on the thickness of the

 coating and the aggressiveness of the environment.

Technology:

The process consists of 6 stages:

1. Degreasing – at this stage, carry out the removal of metal surfaces and structures of fatty

 stains, preservative oils and other synthetic layers that prevent and slow down the digestion

 process.

2. Digestion – is an important stage  in surface preparation for galvanizing metal. On this stage

 is removed from the surface details of the rust and chemical activation of the surface of steel

 without damage to the main surface.

3. Flushing – on this stage is  flushing digestion products from the surface that are prepared to

 galvanizing.

4. Fluxing – the final stage of surface preparation that it is necessary to cover the surface layer

 of salt to ensure optimal adhesion. Besides a flake of flux is protective.

5. Drying – the process of drying is drying salt flux. Products heat up to 100 º C.

6. Galvanizing – the formation of zinc coating as a result of reaction between iron and molten

 zinc.

Each of these processes takes place in special vat.

Hot dip galvanizing services include:

• Chemical preparation of the surface;
• Applying a zinc coating in accordance with ISO 1461:2009;
• Cleaning products after hot-dip galvanizing process.