VCI are compounds being transported in a closed environment to the site of corrosion by the process of volatilization from a source.
For example, in boilers, volatile compounds such as morpholine or hydrazine, are transported with steam to prevent corrosion in condenser tubes.
Only corrosion professionals such as Cor-Pro can evaluate the efficiency of corrosion inhibitors that would be appropriate for specific environments. Using these types of inhibitors should be part of the corrosion protection strategies of companies.