Our plant has 10 degreaser/pickling tanks,
washing and fluxing tanks.
Each tank is entirely made of polypropylene with walls 20 mm
thick and a floor 25 mm thick properly reinforced with
buffers on top of the two heads (12 mm thick) as to avoid
damages produces by the bumping of the material.
The solding system with total penetration guarantees to the
tank an exceptional strengh wich is also absolutely
The degrasing/pickling of the material takes place at
ambient temperature in aqueous solution of hydrocloric
acid (15% in weight) and degreasing additive (2% in
weight).The area where the two pickling tans are located,
has an efficient air extractor unit that guarantees more
than 20 changes of air per hour. In this way the
concentration of hydrocloric acid, in the working areas,
are keept under the fixed amount determined by the
The air is aspirated from the grids standing underneath
the pickling tanks and the air flux (90.000 cm/hour)
moves from up to down as the amount of hydrocloric acid
tends to be heavier in the air.
The aspirated air will be cleaned through a scrubber
supplied with alkaline solution guaranteeing at the
stack a level of pollutants lower than those fixed by
the Italian law (HCL £10mg/Ncm).