The chemical nature of iron and steel makes these metals more susceptible to corrosion than any other metals. Typical multi-purpose inhibitors don't have the ability to protect metal grades at the extreme ends of the ferrous and non-ferrous spectrum. They simply do not have the power and corrosion preventing chemistry it takes to protect iron and steel under severe conditions. Daubert Cromwell Ferro-Film was specifically formulated to protect iron and steel during all stages of packaging, shipping and storage.