Volatile corrosion inhibitors (VCIs) are chemical compounds that help protect metal surfaces from corrosion. They work by releasing vapor that forms a protective layer on the metal, preventing moisture and other corrosive elements from causing damage. VCIs are commonly used in packaging materials, coatings, and other applications where metal protection is essential. These inhibitors are particularly useful in enclosed spaces, such as shipping containers or storage areas, where traditional protective methods may be less effective. By providing a barrier against corrosion without direct contact, VCIs help extend the lifespan of metal products and reduce maintenance costs.