Technology

Our team of ZERUST®/EXCOR® field engineers
uses experience to identify and resolve
our customers' corrosion problems.

ZERUST®/EXCOR®/GARDAC® Volatile Corrosion Inhibitors (VCI)

The protective molecular layer ZERUST®/EXCOR®/GARDAC® VCI forms on metal surfaces inhibits corrosion in three ways:

  1. They passivate the electron flow between the anodic and cathodic areas on metal surfaces.
  2. They form a physical, hydrophobic layer that prevents water and moisture from directly contacting the metal surface and acting as an electrolyte.
  3. They regulate the pH value of the electrolyte.

South America

How our Technology Works

Corrosion and Its Prevention

The corrosion process begins when the moisture in the air is deposited on the metal surface. This moisture acts as a conductor enabling the flow of electrons between high-energy areas (cathodes) and low-energy areas (anodes) of the metal surface.  This electrochemical process then results in the visible oxidation called tarnish, corrosion or rust.

The ZERUST®/EXCOR®/GARDAC® packaging materials contain proprietary chemical formulations that release an invisible, odorless, and non-toxic corrosion inhibiting vapor into the air. The vapor molecules settle on exposed metal surfaces in an enclosure and interrupt the electrochemical corrosion process.

Later, when the parts are removed from the packaging, the corrosion inhibiting molecular layer immediately dissipates into the atmosphere. This leaves behind clean, dry and corrosion free metals that are ready for immediate use and require no further cleaning or handling.