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Acid Pickling Line

Before galvanizing, the pretreatment is needed for workpiece. We call the whole pretreatment and environment protection systems at this section, acid pickling line.

Description

Acid pickling line

Before galvanizing, the pretreatment is needed for workpiece. We call the whole pretreatment and environment protection systems at this section, acid pickling line.


1.Enclosure room

In acid pickling line, there are four tanks for degreasing, pickling, rinsing and fluxing as pretreatment. These tanks are made from reinforced concrete with Acidproof stone and granite lining(the granite is acidproof and the thickness of granite is 80mm). The pickling tank contains hydrochloric acid(HCl) and fluxing tank contains zinc chloride and NH4Cl. Hydrochloric acid is air polluted, we have an enclosure room to keep the fume exhausting and air scrubber system for taking care of acid air before it go to the outside air.

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Material PP, PE or FPR, as buyer’s option.


At this part, we can provide the drawing and material to buyer, and local worker build it under introduction.


2. Tanks

In acid pickling line, there are several tanks. Nowadays, galvanizing manufacturer prefer three main steps, pickling, rinsing and fluxing, the degreasing is deleted from the procedure. There are five single HCl tank, double tank for rinsing and double tank for fluxing. The material of the tanks are mainly PP or FRP material.


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