VCIs (Vapor Corrosion Inhibitors or Volatile Corrosion Inhibitors) have been around since the 1940s when they began to be coated onto paper. In 1979, Northern Technologies International Corporation (NTIC) made two significant innovations, NTIC not only managed to introduce a new VCI chemical system to the market that was used as a common food additive (sodium nitrite) but was also able to successfully impregnate this additive into plastic films. By the early 1980s, NTIC started to sell VCI products under the brand name Zerust which left customers with a few common questions: What is VCI and how does it work?
Vapor corrosion inhibitors (VCIs) are substances that slowly release a corrosion-preventative compound into sealed air space, effectively protecting exposed metal surfaces. VCIs are often used in situations where it is impractical or undesired to use rust-preventative liquids or other surface treatments. The compounds that VCIs release into the air space actively prevent corrosion by forming strong bonds with a metal surface, promoting and maintaining the natural and healthy passive oxide layer on the metal. The VCI layer that forms is invisible and dry, and does not affect the physical properties or functionality of the metal in any way. The protected metal can be painted, treated, and/or used straight out of the Zerust package without further cleaning.
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