VCI Chips chipboard pieces are coated with a layer of corrosion inhibitor anti-rust formula. Compact sized, the VCI Chip is suitable for enclosed areas and packaging. Corrosion inhibitors activate upon contact with exposed metal (ferrous, non-ferrous, and multi-metals). Corrosion inhibitors can also prevent moisture, dirt, oxygen, salts, and other contaminants from depositing metal surfaces. Nox-Rust Vapour Wrapper VCI Chips are multi corrosion inhibitor paper chips to protect ferrous metals such as steel, cast iron, iron, and other ferrous metals. On the other hand, Uniwrap VCI Chips are multi-corrosion inhibitor paper chips to protect ferrous, non-ferrous metal, or multi-metal applications.