Volatile Corrosion Inhibitor
A metal material, or containing metal components, if not properly protected during its manufacturing, storage or transportation steps, may suffer corrosion even before use. Almost always, metallic corrosion is associated with exposure of the metal to a medium in which water molecules, along with oxygen gas or hydrogen ions, exist in a conducting medium.
Modes of protection against corrosion are currently adopted with the purpose of guaranteeing the quality of the manufactured materials, we can mention as examples some families of volatile inhibitors in the solid form (VCI). These can be inserted into a polymer matrix through the manufacture of concentrated additives, which in turn are used in the form of Masterbatch for the manufacture of plastic films for packaging.
The basic operating principle of the VCI anti-corrosive additive is to react with the metal surface where the vapors of these salts condense and are hydrolyzed by the moisture present, causing ion release and the formation of protective film, that protective film layer will prevent the attack of oxidizing agents, and if the formation of water droplets occurs on the surface of the part, the transfer of electrons from the metal to the medium is avoided, keeping the characteristics of the metal part.
Volatile corrosion inhibitors (VCI), in addition to the protection of the metallic material contained therein, give the medium where it is inserted a physical-chemical protection against corrosion.
After the part is hermetically packed with VCI film, without contact with oxygen, a corrosion protection of up to 1 year is estimated.
Product Crystal Master, code 40,000 AN - MB ANTICORROSIVE VCI, application 4%.
ADVANTAGES OF THE USE OF THE VCI ANTICORROSIVE ADDITIVE:
- No deposition of materials on the metal surface;
- No rear cleaning processor required;
- Simplicity of application: flexibility;
- Offers chemical and mechanical resistance;
- VCI migration to any cavity and location of the metal part;
- Neutralization of the corrosion current.