How much EXCOR VCI must be placed in the packaging?
The component part or volume needing protection must be completely enclosed by an EXCOR active material. If complete EXCOR packaging is being used no additional VCI material is required. However, this also depends on the nature of the packed merchandise. If there are difficult to access areas, it is advisable to use UNICO or EMIBO to boost the local VCI protection.
Does an effective distance or direction have to be considered?
Almost all EXCOR products are active on both sides, i.e. either side can be oriented toward a metal surface. This increases the effectiveness of the protection. No attention needs to be paid to a possible effective distance.
What happens after VCI packaging has been removed?
After removal of the EXCOR packaging the VCI substances present on the metal surface disperse within one to two hours.
Is VCI paper better than VCI film? What are the differences between them?
Both products contain identical EXCOR VCI substances, tailored to the different substrates. The differences are material specific: paper releases VCIs more rapidly than PE film but does not retain a depot for as long. PE film acts as a barrier to water vapour, whereas dry paper readily absorbs moisture. The application should be oriented toward the goods to be protected and the details of the manufacturer's packaging operations. We will be glad to advise you on this.
Can EXCOR products be reused?
All EXCOR products can be reused if they are dry, clean and undamaged. The material specific differences between PE film, foam and paper must be borne in mind. VALENO retains its VCI content for longer than ABRIGO. As a result VALENO Film can often be reused for several years, though this depends on the specific application.
Is there any health risk from using VCIs?
All EXCOR products have been tested by independent bodies and classified as 'physiologically indifferent' (i.e., not harmful to health). All EXCOR products qualify for Water Hazard Class 0. We will be glad to provide you with the relevant expert reports.
How well sealed does VCI packaging have to be?
The more tightly sealed the packaging the better the corrosion protection. Damage to the film wrapping can be sealed with adhesive tape. It is not necessary to extract air or weld the film together. However, water must be prevented from penetrating the packaging.
How long does EXCOR VCI corrosion protection remain effective?
Corrosion protection lasting more than 10 years is possible if the packaging is designed such that the EXCOR active substances cannot escape from the packaging. The more airtight the transport packaging is, for instance using a sealed wooden or metal box, the longer the corrosion protection lasts If the packaging is required to provide effective protection for over two years EXCOR should be involved in its design.
How can I tell whether my products require VCI protection?
In case of doubt we advise consulting EXCOR. EXCOR possesses wide-ranging testing capabilities which quickly enable us to determine the optimum method of protecting a given part. With small parts customers can conduct their own tests. Try packing identical parts at the same time and under identical conditions, one part in normal film and one in EXCOR film. Next store these parts for several days undercover but open to the elements. If the part packed in normal foil shows signs of corrosion, while the one packed in EXCOR film shows none, it can be assumed that the part requires VCI protection.
Do different metals require different VCI systems?
Different metals are subject to different corrosive processes. In light of this, on top of its standard multi-metal protection systems EXCOR also offers metal-specific VCI systems. For certain products these allow the VCI corrosion protection to be further enhanced. EXCOR's metal-specific VCI systems have the following goals:
- Ferrous metals: Stabilisation of the passive oxide coating and repairing microdefects
- Copper: Developing stable conversion layers
- Combinations of cathodic and anodic inhibitors individually tailored for the metal in question.
Which EXCOR system is most suitable for which metals?
- Type E: Steel, cast steel, partially galvanised steel, Cr, Al 4xxx (Si > 7%), cast iron
- Type NE C: Cu, brass, Al 2xxx (Cu) and 5xxx (magnesium) possible
- Type NE S: Ag, Cu, brass, Al 2xxx (Cu) and 5xxx (magnesium) possible
- Type MM: Steel, galvanised and tin-plated steel, Cu, brass, aluminium 2xxx (Cu), 5xxx (Mg), 6xxx (Mg, Si), 7xxx (Zn), other Al alloys on request, also combinations of the above metals
- Type A: steel, galvanised and tin-plated steel, Cu, brass, aluminium 2xxx (Cu), Mg alloys possible, cast iron