What are VCI- or VpCI-agents?
VCI/VpCI are polar, they are also known as organic substances in the form of neutralised salts having low Vapour pressure. Depending on their chemical structure; they can provide cathodic and anodic protection.
Experts confirm, they are toxically harmless and show hardly any side effects on other materials, such as lacquers or thermoplastic.
A combination of VCI products with different evaporation rates create a quick build-up of the protective atmosphere and finally serve as a long-term stabilisation method.
How do they work?
Both, VCI and VpCI evaporate slowly. After this, they saturate the enclosed atmosphere with their vapours. Once the polar VCI molecules have a high affinity for the moisture film present on any surface, then they are absorbed on the bare metal surfaces.
They then form a nearly monomolecular protective layer which also reaches difficult to access areas.
Thanks to the formation of this protective film, electro-chemical corrosion reactions are interrupted. Unlike protective coating and desiccant methods, the active VCI film self replenishes forming a clean metal surface, even at highest air Humidity.