Hot-dip galvanizing of metal structures
The "Cone" plant produces hot-dip galvanizing of products using modern equipment of the Italian company "Gimeko" using the latest technology. Thorough preparation of the steel surface, including degreasing using surfactants, pickling, washing and fluxing, guarantees European quality coating.
Galvanization is carried out both externally and internally. High-tech new equipment allows galvanizing of unique structures weighing up to 6 tons after individual processing of the order by technologists. Overall dimensions of the galvanizing bath: (length x width x height) 15 × 1.8 × 3.5 m. The thickness of the zinc coating: from 40 to 200 microns
HOT GALVANIZATION - GUARANTEE OF LONG LIFE OF PRODUCT USE
Corrosion leads to premature failure of expensive products and structures, to the destruction of technological processes and equipment downtime. A prepared product made of steel or cast iron is immersed in zinc melted at a temperature of 450 ° С, as a result of which the metal is coated, including cavities and hard-to-reach spots at the molecular level, and provides the metal with a long service life (from 50 to 80 years). The coating thickness will be from 40 microns.
HOT Galvanizing - Hot Galvanizing - THE MOST EFFECTIVE METHOD OF ANTI-CORROSION PROTECTION
The zinc coating creates not only an anti-corrosion barrier with a thickness of 40 microns, but also provides electrochemical protection of steel. The latter is known as “sacrificial protection,” because zinc sacrifices itself to protect the steel on which it is applied. Zinc will continue to act in this way until the very last atom.
Even if the zinc coating is damaged due to the presence of a buffer layer (an alloy of two metals formed under the influence of high temperature during hot dip galvanizing), corrosion will not affect the base metal!
Applications for galvanized products
Galvanizing cycle
- Galvanization is carried out both outside and inside the products.
- High-tech new equipment allows galvanizing of unique structures weighing up to 6 tons after individual processing of the order by technologists
- Overall dimensions of the galvanizing bath: (length x width x height) 15 × 1.8 × 3.5 m
- Zinc coating thickness: from 40 microns
The main stages of the process
Metal structures must be delivered in batches with steel grade indications and must meet the required criteria.
2.1 Degreasing
The degreasing process is designed to remove grease stains, oils and other synthetic impurities from the surface of the "black" metal structures that slow down and worsen the etching process.
2.2 Flushing
Rinsing after degreasing is carried out in order to remove fat droplets from metal structures. Prevention of their entry into pickling baths.
2.3 Etching
Preparation of metal surface for galvanizing. The pickling process is designed to remove rust and scale. The surface of the steel is activated without damaging it.
2.4 Flushing
Washing after etching is necessary to remove iron chloride residues from the surface of metal products and to prevent the transfer of hydrochloric acid solution to the fluxing bath.
2.5 Fluxing
The process of applying a protective layer to the surface of metal structures. Prevents the formation of oxide films. Provides a high degree of adhesion of the zinc melt to the metal surface.
Metal products are heated to a temperature of 100 - 120 ° C. Moisture is removed from the surface of the product, and temperature preparation for the galvanizing process takes place.
The galvanizing process is the main technological process of hot galvanizing. It is produced in a zinc melt at a temperature of 450 ° C
In the process of cooling, the final appearance of the appearance of the zinc coating of metal products takes place.
The applied zinc coating is subjected to control in appearance and thickness in accordance with GOST 9.307-89, STB ISO 1461-2009
