Cadmium, a naturally-occurring element, is one of several metallic coating materials which are electrochemically active and, therefore, used as sacrificial coatings to prevent corrosion. Typically they are applied to iron, steel, zinc, aluminum, and titanium alloys, as well.
Cadmium coatings are used on hardware that must be subjected to harsh environments, especially where good corrosion resistance to marine or salt-laden atmospheres is required. Cadmium coatings are often employed in shipbuilding applications because of their high resistance to sea salt, and also in railroad, and ordnance applications. In addition, cadmium coatings have good corrosion fatigue properties as well as resistance to stress corrosion cracking, making them valuable in protecting high strength steel fasteners utilized in the aircraft industry.
Quoted from a Raytheon senior principal engineer: “The overwhelming majority of reported occurrences of cadmium bloom on hardware have been associated with entrapment of acidic vapors together with the cadmium in a sealed enclosure. Acids can be formed in hardware shipping containers when humidity and moisture present in the container react with glue used in plywood or green wood (shipping pallet) to form corrosive formic acid vapors. Our root cause for cadmium bloom appears to fit this condition.” Intercept packaging was tested and has been continually proven in practical use to prevent cad bloom under these circumstances.
Liberty Packaging's video about corrosion:
And another about Intercept:
Intercept Technology Packaging products fit within a sustainability strategy because they are reusable, recyclable, do not contain or use volatile components (No VOCs, Not a VCI) and leave a smaller carbon footprint than most traditional protective packaging products.