Global Dom’s Products and Services
GLOBAL DOM’S PICKLING PLANTS
Global Dom's Pickling PlantsPickling plants supplied by Global Dom are characterised by some specific features which make them particularly suitable for cold drawing plants.
The plant pickles tubes come from rolling mills before the production cycle gets started and pickles them after the heat treatment, before starting a new drawing cycle.
The plant uses acid and bonder for a perfect drawing of the tube.
Global Dom ensure a complete plant in terms of chemical and physical management of the tanks, automatic management of the bundles, filling, emptying and heating of the fluids and fumes abatement according to EC standards currently in force.
Furthermore, depending on the chemical process used in the plant, our company can offer the possibility to install secondary plants to purify liquids or air, and a plant for wastewater recirculation.
What are the component parts of a pickling plant?
Hot degreasing tank
Hot washing tank
Hot sulfuric pickling tank
Bonder tank or phosphating tank
Bonder washing tank
Hot neutralization tank
Steam generating system with boiler and piping
Acid fumes abatement system (scraper 1)
Bonder fumes abatement system (scraper 2)
Sulfuric acid filling and emptying circuit
Bonder filling and emptying circuit
Water treatment circuit for washing (not supplied)
Mechanical parts for handling beams in tanks
Air manipulator to load and unload tanks
Tracks for beam supply and transportation
Control and automation system
Hardware and software
What's Pickling?Pickling is a chemical process carried out to remove surface layers of specific materials through acid or alkali solutions. When metal materials need to be treated, the treatment removes the oxide layer on the surface or other contaminant materials, so that the surface of the metal can be covered with another metal. After the picking process, the treated surface becomes porous, allowing the other metal to firmly bind to the underlying metal. After that, the surface is cleaned from rust residues formed by laminated steel products, surfactants (soaps that increase wetting) and corrosion inhibitors or other chemicals substances, calamine, or lamination scrap. This is one of the most common methods to preparing steel surfaces where the anti-corrosive protective coating is to be applied.
This is also a preliminary process to obtain the best result on those steel tubes placed at industrial drawing plants. In that case, sulfuric acid is used on low alloy steels, while the cloridric acid is used on stainless steels.