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Service catalogue

 

1. Etching in water solution of sulfuric acid, rinsing, treating with borax, drying off surface of the wire rod

 (low-, medium- and high- carbon steel)

 Ø 5,50 mm and above, coils of wire around 2,0 Mg steel bar as above

 

Prospective customers: manufacturers of wires and wire products who do not have own etching room and equipment for mechanical skinning of iron scale.

Description:

Etching is a method of cleaning corrosion from steel surfaces. It consists in removing corrosion products from the surface by means of etching solutions. Corrosion products take on a form of iron scale  – iron oxides – oxides, hydroxides and basic salts. Therefore, appropriate pickling inhibitors are let into the bath in order to inhibit reaction of acid with metal.

 

 

2. Steel wire electrogalvanizing

   (low-, medium- and high- carbon steel)

    diameters : 1,60 mm- 3,50 mm,

   - coils of wire (input)- mass around 300,0 kg,

    internal diameter of coil - Ø 800 mm,

   - coils of wire (output)-mass around 100,0 kg,

   internal diameter of coil - Ø 600 mm

 

Prospective customers: manufacturers of wire products e.g. forestry, gardening, floristics, cultivations, plantations, reinforcement wire for cables, ribs for umbrellas/ roofs, shutter springs, other springs, sieves, car industry and industrial engineering.

Description:

Electrolytic coatings are formed on the electrolitically conducting surface (wire) through electrolysis. Wires with properly cleaned (degreased, etched and rinsed) surface are submerged in the electrolytic solution that contains metal ions (zinc). During passage of current through the electrolyte metal zinc ions (anode) move towards the surface of wire (cathode) and form coating on it. The electrolyte is a water solution of zinc and aluminum salts - sulfates.

Fine-grain coatings are desired - with fine-crystalline structure.

After having coated the surface of wire during electrogalvanizing, zinc is electronegative metal. The zinc coatings on steel (wire) have protective function - they prevent metal corrosion. They also determine specific technological and physical properties of this metal (e.g. increased abrasion resistance, low coefficient of friction). Zinc on steel constitutes an anodic coating.

Anodic coatings in specific corrosion environments have lower electrochemical potential than the potential of the protected surface. In case of any damage to such coating, only the coating is harmed. The surface (steel) under the coating does not suffer from corrosion.

Electrolytic zinc coatings are characterized by good adhesion to surface, high coating density, fine-crystalline structure, appropriate (minimum) thickness for particular conditions of use, smoothness and plasticity.

Acid bath is applied in the process of wire galvanizing. The zinc coating of quality class B and thickness between ten and twenty µm (possibility of adjustment to a respective diameter of wire) has a protective value proportional to thickness: 15-20 µm (Ø 1,60-3,50 mm).

 

 

3. Steel wire hot galvanizing (dry galvanizing)

   (high-carbon steel)

   diameters: 2 mm - 3,60 mm,

   - coils of wire (input), mass around 300,0 kg,

  internal diameter of coil - Ø 600 mm,

   - coils of wire (output), mass around 600,0 kg

  internal diameter of coil - Ø 600 mm

 

Prospective customers: manufacturers of wire products, forestry, gardening, floristics, cultivations, plantations, wire, sieves, cores for aluminum cables, industry engineering.

Description:

Steel wire hot galvanizing (dry galvanizing) ensures long and solid rust-proofing. It is the least expensive, most efficient and most popular method of corrosion prevention.

Resistance of zinc coatings depends on aggressiveness of environment.

Hot galvanizing does not change properties of steel and enables to cover the surface with zinc layer accurately and at a uniform rate. During hot galvanizing liquid zinc diffuses into steel surface and creates alloy layer. After processing the wire in zinc bath, a layer of pure zinc has been formed on outer layer of the alloy.

Thickness of this zinc layer is either measured in micrometers or specified as mass of the zinc coating in g/m2 (1 µm = 7 g/m2). The norms PN-EN 10264-2 and 10264-3 specify minimum thickness of zinc coating of quality class A that are required depending on diameter of galvanized wire. Thickness of the zinc protective coating formed on steel (wire) after hot galvanizing is 30-40 µm 2,0-3,6 mm).

Polskie Liny Sp. z o.o.
ul. Powstańców 17
40-952 Katowice
Zakład produkcyjny:
ul. Niwecka 2
41-200 Sosnowiec
tel. +48 32 290 19 15
fax: +48 32 290 19 16
e-mail: polskieliny@polskieliny.pl
KRS 0000236178
REGON 240109716
NIP 954-251-77-67