Corrosion prevention is important for sensitive items that are being stored for a long period of time and shipments via ocean transport, where moisture could invade and jeopardize product integrity.
Corrosion Inhibitors & Preservation Packaging
Vapor phase corrosion inhibiting products (VPCI) use molecular compounds in vapor phase to prevent corrosion in machining, milling operations, and in military preservation. The chemical compound actively attaches to metal to prevent corrosion.
Vapor phase products work as a gas rather than requiring physical contact; plastic wraps and foam pads emit molecular protection for metal surfaces without being in direct contact. For longer-term preservation "Emitters" are used. These emit larger amounts of the corrosion inhibiting molecules than the other products alone.
These products work even in the presence of water. Since water damage is more than just corrosion we recommend that VPCI be used in conjunction with other preservation packaging like; gusseted vapor barrier bags, shrink film, and desiccants.
A silica gel desiccant is a substance that absorbs water vapor from the air. Typically used in the packaging industry desiccants are used to eliminate the harmful humidity that could potentially degrade or even destroy products that are sensitive to moisture.
Gusseted Vapor/ Moisture Barrier bag
Vapor Barrier bags (aka: Vacuum Packing, Vapor Packing, Foil bags, Method II, Method 50) have been developed as a means of preserving the contents of a package against damage from elements such as; dirt, dust, salt spray, grease, moisture, and other airborne contaminants.
Poly/foil laminate (Marvel Seal 360, MIL-PRF-131J Class 1) Less expensive, lightweight, greaseproof, vapor proof and waterproof.
"Scrim-fabric"/foil laminate (MIL-PRF-131K Class 3) is more heavy duty and stands up to abuse better than the poly/foil because of its fabric backing. Bag styles available:
Flat Bag (sealed on three sides and open on one)
Gusseted-flat bottom bag (two piece with a top and bottom tray)
Shrink wrapping consists of a polyurethane sheeting completely shrouding a product, then heat is applied to the material which causes it to shrink conforming to the shape of the product. The heated film then hardens and maintains it's rigidity, holding the product in place. Use ranges from domestics shipments and in-house storage.
Benefits: Re-entry Capabilities - Improved protection - Seamless containment - UV inhibitors - 2 year outdoor life-span - Qualifies as a recyclable plastic.
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