VCI is the generic term for “volatile corrosion inhibitor,” “vapor corrosion inhibitor,” or “Vapor phase Corrosion Inhibitor,” a revolutionary technology that simplifies corrosion protection and is ideal for keeping enclosed void spaces (e.g., packages, equipment internals, or structural metal cavities) rust-free. We have trademarked our Cortec® brand of VCIs under the name VpCI® to help ensure our customers are getting the premium VCI products that are trusted globally.

Facts about VCIs:

  • The VpCI® molecules diffuse from areas of high concentration to low concentration reaching all areas of the enclosure.
  • VpCI® molecules can go wherever oxygen molecules can go making VpCI's an effective protection method for hard-to-reach areas such as crevices.
  • VpCI's have an affinity and are attracted to metallic surfaces where they condense to provide protection.
  • VpCI® molecules are based on amine carboxylate chemistry. These molecules are dipoles with non-uniform distribution of charges which translates into attractive forces that that pull the molecules towards the metallic surfaces.
  • VpCI's are effective at protecting multi-metals in electrical, static, rotating, and civil equipment and structures.

How does it work?

Technically, VpCI® molecules arrange themselves parallel to one another and perpendicular to the metallic surface forming a monomolecular layer. This layer adsorbs to the metal, displaces the water molecules, and protects the metal from corrosion. Being a dipole allows the protection of both the anodic and cathodic components of the corrosion cell.

Advantages of VCI/VpCI Technology

VCI technology has many advantages designed to save time, money and offer more thorough, reliable, and easier-to-use protection than a variety of other metals preservation strategies.

  • VCIs do not require the special removal of a coating or greasy rust preventative.
  • Reduces labor time and hazardous waste disposal fees from having to clean off traditional petroleum-based rust preventatives, often with solvent-based cleaners.
  • VCIs do not require a constant source of electricity as needed for dehumidification systems.
  • Solves the problem of protecting intricate equipment internals (e.g., pipes, boilers, valves) where it would be difficult to apply a coating or liquid rust preventative.
  • VCI technologies protect multiple metal types and work in multiple phases (liquid, vapor, and interface), so they can be used to inhibit corrosion on metal surfaces below and above the fluid level.

Some of the well-known VpCI® products in Cortec's portfolio are VpCI®-337, VpCI®-609 and VpCI®-649. To view the complete range of Vapor Phase Corrosion Inhibitor product please visit our products page or talk to one of our experts.

Safety Benefits of Cortec’s VCI/VpCI Technology

Cortec® VCIs are generally safer to handle and less hazardous than other VCIs that rely heavily on nitrites. Many Cortec® products containing Vapor phase Corrosion Inhibitors are also recyclable or water-based and typically have a lower environmental impact than many harsher chemicals.