VCI Technology

When a metal comes into contact with oxygen, a primary oxide film (POF) forms on its surface, which is a natural defence mechanism against corrosion.

Depending on the type of metal and the atmospheric conditions, the POF layer is more or less stable and can be more or less easily damaged or destroyed. The consequence of the destruction of the POF layer can be corrosion of the metal surface.

To prevent the corrosion process we can use, among other things, corrosion protection technology based on Volatile Corrosion Inhibitors – VCI (Volatile Corrosion Inhibitor).

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How it works?

Zerust®/Excor® anti-corrosion products, containing VCI, protect against corrosion in three ways:

  1. Stop the flow of electrons between the anode (the area where the oxidation process occurs) and the cathode (the area where the reduction process occurs)
  2. Form a physical, hydrophobic layer that prevents direct contact between moisture (the electrolyte) and the metal surface.
  3. Regulate the pH value of the condensed water vapor (electrolyte)

If the metal is stored in a VCI package, we can obtain corrosion protection that will last up to 5 years, even under extreme conditions.