ELECTROCOATING/E-COAT SYSTEMS

 Its purpose is to act on metallic surfaces by chemical deposition. The main objective is to guarantee the final resistance of the product against corrosion, excessive wear of parts or equipment, when subjected to mechanical stress, and to provide an anchorage for the coating (painting).

 The part to be painted constitutes the cathode of a direct current circuit and the negative pole of the rectifier is connected to it, the positive pole (anode) is a stainless-steel plate or tube that is housed inside the dialysis cell. Dialysis cells are used to remove the acid that is continually released during the painting process. By controlling and maintaining the acid level of the ink bath, the cell ensures constant pH and conductivity. 

Its function is to remove excess surface paint from the E-Coat, making the parts drag as little paint particles as possible to the next stage.

Constructed with Polypropylene, this tank uses a pump to move anolyte to the dialysis cells that are positioned on the side of the KTL-E01 tank (KTL-X01 to KTL-X32), in order to remove the acidity of the paint. This tank has 20 flowmeters for flow indication, one for each anode. At the output of the pump, there is a conductivity meter to indicate the conductivity of the tank, which is monitored/controlled by the PLC.

Its function is to maintain the paint temperature according to the project scope. E-coat paint must be temperature controlled in the main and reserve tanks. For this, a thermo chiller is responsible for generating water at a controlled temperature, passing through the plate exchanger, exchanging the temperature with the ink. A filtering system using bag filters and magnetic bars filters the paint before entering the plate changer.

Responsible for cooling or heating the paint through a plate exchanger in order to keep its temperature stable (temperature defined by the paint supplier). This equipment is an integrated part of the painting line.

This is the main tank that performs the painting of the parts through the electrodeposition process. This process consists of immersing the object to be painted in a bath of paint diluted in D.I. water, where a continuous electric current is passed and, through a potential difference, an organic coating is deposited. This coating forms a uniform and cohesive film on the surface of the part. 

The ultrafiltered tanks remove excess E-Coat paint deposited on parts after the painting process. The bath used is called permeate (ultra filtrate). Rinsing the parts with the permeate allows the recovery of paint that did not adhere to the part, but which was mechanically dragged by it.