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Viale Monza, 338 - 20128 Milano - Italy
Tel. +39 02 27.09.41 - Fax +39 02 27.09.43.43
web site: www.trasmetal.net
email: info@trasmetal.net


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Particularly important for Trasmetal was the development of electrophoresis technologies (“anaphoresis”, in which the workpiece represents the negative pole and “cataphoresis” in which the workpiece represents the positive pole).

ELECTRODEPOSITION PAINTING SYSTEMS
Similarly to immersion tanks, the parts are completely immersed in a tank containing paint diluted with water. Continuous electrical current is sent to the tank. The painting product deposits on the workpiece, which acts as one of the two electrodes, while the water soluble-resin is discharged on the other electrode and eliminated. Upon exiting the tank, the substance deposited on the workpiece is already insoluble; it therefore undergoes washing (inside a post-electrophoresis tunnel in order to remove and recover the small amounts of substances that are dragged mechanically. As with the immersion tanks, the workpiece enters a furnace where the painting product reticulates.
Differently from immersion tanks where the workpieces on the same line may have different dimensions and shapes, during electrophoresis the workpieces to be painted must have the same or only slightly different shapes and dimensions in order to avoid distortions in the electrical field.
Electrodeposition allows a uniform coating with a thin film and excellent resistance to corrosion. Though frequently used as a substrate on many products (automotive industry, auto components, household appliances, agricultural machinery and more besides), it is increasingly often applied as the single finishing coat (pumps, lighting bodies).

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