ANI Metal

Cold rolling and machine processes done on steel components leave residual oil and grease on the surface of the metal. Before efficent pretreatment of the surface of the steel can be obtained suitable for galvanising this oil and grease has to be removed.

HYDRONET® is a chemical degreaser operating at an acid pH, it transforms oils and greases into a flocculant which settles at the bottom of the bath.

The advantages of using HYDRONET®

- it is compatible with the pickling baths so there is no need to rinse the materials before the pickling stage

- it performs a pre-pickling operation which increases the productive potential of the actual pickling stage

- it reduces pickling time while controlling the aggression of the hydrochloric acid on the steel

- it works at room temperature (not below 18°C and not over 40°C), to get better performance we suggest to work at a temperature between 30°C and 35°C

- the solution is easy to handle simply by checking the pH regularly (weekly in big baths, daily in small baths).

Preparing a new bath

To prepare a new degreasing bath proceed as follows:

1. verify that the tank can contain acid solutions with an orthophosphoric acid base

2. verify the volume of the tank

3. fill to 90% of the operating volume of the bath with mains water, not recovery water

4. fill the remaining 10% with HYDRONET® Base, pouring it under the surface of the water

5. perform a light agitation of the bath; avoid blowing air or other strong agitation systems

6. check pH value which should settle at about 1,8

7. begin the degreasing stage.

Management of the bath

After a number of immersions, the initial 1,8 pH value will reach a higher level. At regular intervals check this value and perform the necessary recharges by using only HYDRONET® Ricarica. The dosage calculator supplied with the product will indicate the exact quantities. For a proper and continuous degreasing action we suggest you to perform recharges when the pH value is between 2 and 2,5.

The liquid part is never disposed of but is regenerated constantly by adding fresh product and water to maintain the necessary levels while the sands which deposit on the bottom of the bath must be removed once a year or, in any case, when they prove to interfere with the normal operation. The extracted sands must be disposed of according to local laws and regulations.

Versions of HYDRONET®

HYDRONET® Base: for the initial preparation of the degreasing solution compatible with

pickling in hydrochloric acid (HCl)

HYDRONET® Ricarica: for the refilling of the degreasing solution compatible with pickling in

hydrochloric acid (HCl).

HYDRONET® S: for the preparation and refilling of the solution compatible with

pickling in sulphuric acid (H2SO4).