Immersion pickling is clearly the preferred choice.

By immersing the machined part in a tank of pickling liquid, you ensure the most uniform surface possible. This process can take up to 8 hours, depending on the type of steel.

After pickling, the parts are transferred to a rinse tank filled with water. The final step is a thorough high-pressure rinse at approximately 180 bar.

As an additional treatment, a passivation fluid can be sprayed on to improve the resistance of the surface.

The immersion pickling is carried out in immersion tanks measuring 10 x 3 x 2.5 metres.