VCIs: effectively combatting corrosion

When they come into contact with oxygen, all metals form a primary oxide layer  which protects the metal underneath from corrosion.  How stable this protection is, however, varies depending on the type of metal involved and the environmental conditions.  If the primary oxide layer is damaged even slightly, the underlying metal will react with the elements in its vicinity and corrosive pitting sets in.  The process can lead to the complete destruction of the metal and the potential for damage during shipment and storage is great.

Fortunately this outcome can be averted through the use of  volatile corrosion inhibitors (VCIs), substances which slow the corrosive process virtually to a standstill. Provided the EXCOR VCI substances remain in the VCI packaging, the active corrosion protection can last for decades, even under extreme conditions.

VCIs: how do they work?

The idea is as brilliant as it is simple:
The various EXCOR packaging materials are treated with active VCI substances.  As soon as any metal product is packed using EXCOR VCI products, the VCI substances impregnated in the packaging material evaporate to form a gas which diffuses throughout the air-filled space within the packaging until saturation point is reached. This is known as the build-up phase. They then form an invisible protective monomolecular coat on any metal surface.  The VCI substances stabilise the metal's primary oxide layer,  ensuring that neither moisture nor atmospheric oxygen can come into direct contact with the metal surface and slowing the corrosion process literally to a standstill.


Regardless of any drill holes, folds, threads or cavities they may contain,  this technique ensure any metals packed as air-tightly as possible in EXCOR VCI packaging and receive effective protection from corrosion.  Even if the packaging is briefly opened this will not have any harmful effect because the protective VCI atmosphere soon regenerates.  After the packaging is removed the EXCOR VCI substances  evaporate completely within one or two hours and with no health risk.

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