All types of anti-corrosion foils were tested at the Military Research Institute in Brno, Czech Republic and have been recommended for military use. The certificates can be found on the web site.
How does the corrosion protection work?
Active substances, so-called VCI (Volatile Corrosion Inhibitors), are chemical compounds with a low vapor pressure, i.e., substances volatile at room temperatures. When an enclosed space is formed above the protected metal surface, the VCI molecules evaporate and create a microclimate inside the package.
In an atmosphere rich in VCI molecules, they condense and cover the metal surface with a microscopic layer of VCI molecules, which prevents access to substances causing corrosion. The barrier enclosing the protected space limits the loss of VCI outside this space and thereby ensures both the sufficient concentration of active substances and the required period of protection.
It is important that the content of water vapor does not rise inside the packaging with the layer of VCI inhibitors. Therefore, it is recommended to insert a water vapor absorber into the packaging in order to guarantee the correct functioning of the anti-corrosion packaging material.