VCI is a kind of corrosion inhibitor prepared by special synthesis process and compounding.

It can be directly gasified at room temperature and pressure by itself and adhering to suitable carriers. In the sealed environment, any space gap in the unit will be filled with mixed gas containing VCI rust-proof factor through self-adjustable continuous volatilization. When the gas encounters the metal surface, it will adsorb on it and form a dense protective film with only one or several molecular thicknesses. The protective film can effectively isolate metal surface from contact with water, oxygen and other harmful atmospheric corrosion factors, and inhibit the occurrence of electrochemical reactions to promote metal corrosion, so as to achieve the best anti-corrosion effect.