When discussing VCI Poly vs VCI Paper, there are four main differences between the two. The good news is both products can be used in packaging programs to leverage the benefits of each type.
Volatile Corrosion Inhibitor (VCI) Packaging is an effective way to prevent corrosion on metals. When packed correctly, VCI packaging can protect clean metals for years in shipping and storage. Typical VCI packaging products are VCI poly sheeting, VCI bags, VCI Kraft paper, and other VCI wraps.
When shipping metal parts in corrugated, do the unprotected parts to touch the box? If so, then the corrugated may be the source of the corrosion.