Passivante P 2000 (without nitric acid)


PASSIVANTE P2000 is a liquid passivating agent based on citric acid and does not contain nitric acid in compliance with ASTM 967. This passivating agent has a low environmental impact and has been designed to increase resistance to corrosion and guarantee, after adequate pickling, restoring the passive film of chromium oxide, typical of 300 series stainless steels.

Its use allows solving the problems of nitrates in water and NOx in aspirated fumes. It can also be used after an electropolishing treatment to remove any stains and haloes.

Instructions for use

The product is to be used diluted 1:1.

Chemical treatments are generally not effective if oils and greases are not removed beforehand. It is advisable to pre-treat the surface with a degreasing liquid, as good degreasing is essential to obtain a good result.

Application is normally by immersion in PP, PVC and steel tanks or by spraying.

To heat the solution, it is recommended to use PTFE (Teflon) heating elements. The P2000 passivating liquid works at a temperature of 30°C, but can be used up to 70°C.

The P2000 passivating liquid application time is affected by the operating temperature.

The treatment time varies depending on the temperature at which you operate:

  • For temperatures between 30 and 50°C, the application time is 20 minutes.
  • For temperatures between 50 and 60°C, the application time is 10 minutes.
  • For temperatures between 60 and 70°C, the application time is 4 minutes.

Once the pieces have been passivated, thoroughly wash them using a high-pressure washer. A final wash with demineralized water ensures obtaining an optimal result.

If you want to significantly increase the resistance to corrosion, apply POLINOX B PROTECT after passivation. POLINOX B PROTECT optimizes the formation and composition of the passivation layer which increases stainless steel resistance to corrosion.

Precautions for use

Use suitable personal protective equipment and follow the instructions on the safety data sheet.


Washing wastewater is acidic and therefore cannot be drained directly but requires neutralization and decantation.

Industrial wastewater may only be drained after authorization of the competent authorities. Delmet can supply manual or automatic equipment for this type of treatment.

Available formats

Passivante P2000 is available in the following formats:

  • Liquid Passivante P2000 in containers of 10 kg (PC00053)
  • Liquid Passivante P2000 in containers of 1000 kg (PC00052)

Download the technical sheet in PDF format

Download the technical sheet in PDF format

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