Deva’s preservatives are manufactured using proprietary technology, providing specific protection for each type of metal. Volatile Corrosion Inhibitors (VCI) of DEVA are not toxic and do not pose any risks to health and the environment.
It is an innovative organic compound with differentiated molecular structure, safe for people and the environment, which remains active in the substrate where it is applied: paints, resins, varnishes, plastics, process fluids and cellulosic products, among others. The Advanced VCI in the presence of metals, act effectively in the vapour phase or by contact, without interfering in any electrical activity, which can compromise the stability of the metallic surface.
VCI are organic salts derived from safe preservatives which gradually volatilize saturating the internal environment of the package by depositing these salts on the metal surface. It will form an invisible monomolecular layer which protects against corrosion. When opened, this protective layer will dissipate without residue, leaving the metal clean and ready for use.
Action on the packaging: The organic base acts as a passive and active loader, which carries (when volatilized) an organic or inorganic ion. The natural tendency is that it deposits on the metal surface, forming a uniform and invisible film. After a certain concentration level of vapor, equilibrium is established, which results in a perfect trade-off between the inhibitor on the packing and on the metal surface, meaning that the condensation mechanism has the same speed as the vaporization mechanism.
In an ideal system for the occurrence of protection, the package must be airtight causing the equilibrium in the system. In this case the durability of anti-corrosive protection with VCI tends to be infinite. If there is an exchange with the outside (small leaks or vents) there will be a constant 'renewal' of the environment can which causes consumption and consequently wear of the VCI implemented in the system.
The inhibitory layer or film on the metal surface is preserved while the product remains enclosed in the package. The protection mechanism ensures that the parts are ready for immediate use without the need of cleaning or washing with solvent.
Our Dev VCI O-Shield 80/82 are proved to stop the galvanic related carrion in the instrument air lines, Hydraulic lines where different combination of ferrule, threaded, crimped joints used to corrode locally due to galvanic corrosions are stopped when we apply our preservative.
Unlike oil-based preservatives, Deva’s majority of products do not need solvent based cleaning during preservation time,unwrap and use, thus resulting up in low labor cost.The VCI product is 100% biodegradable.