Related Glossary Terms
Thin web or film of metal on a casting that occurs at die partings and around air vents and movable cores. This excess metal is due to necessary working and operating clearances in a die. Flash also is the excess material squeezed out of the cavity as a compression mold closes or as pressure is applied to the cavity.
VpCI®-277, a ready-to-use dry film rust preventative especially designed for preservingmetals during storage
and transportation. VpCI®-277 combines film-forming additives with Vapor phase Corrosion Inhibitors to
provide excellent multi-metal corrosion protection. It is ideal for robotic assembly of precision components requiring tight tolerances and helps maintain a clean preservation process through absence of oily residue without containing chlorinated compounds, chromates, or nitrites. After major automotive manufacturer used Cortec’s VpCI® products to protect parts during temporary storage and overseas shipping, they were very pleased with the protection achieved by applying a tenacious VpCI® film to the metal parts. However, they needed a rust preventative with a drier film and a low VOC that would also meet their solvent-based specification. Cortec® R&D solved the problem by developing VpCI®- 277, a rust preventative containing a biobased corrosion inhibitor in a non-flammable, low VOC solvent carrier.
VpCI®-277 can provide corrosion protection for up to two years of indoor storage or during domestic or international shipments when combined with VpCI® packaging materials. The product leaves a dry, non-tacky, virtually undetectable film on the metal surface. The use of rust preventatives to preserve metals during storage and transportation has traditionally been a hazardous and messy process in which greasy rust preventatives must be applied and removed several times. This is because metal work-pieces risk flash corrosion as they frequently sit in temporary storage awaiting the next step in the manufacturing or assembly process.
Applying a rust preventative protects the parts but often requires an additional step of cleaning before the components can go through the next phase of the process. Cortec’s innovative products are able to streamline processes for more efficient manufacturing, assembly, storage, or shipping. The goal is to achieve quality protection while eliminating steps, improving tact time, reducing the use of additional materials and cost.
VpCI®-277, can be applied by spray or dip and left on metal parts during further processing or shipment. It does not require removal by the end user because the undetectable film does not interfere with use of the product in tight tolerances. This is significant as it eliminates the extra step of cleaning, significantly cutting down on labor time and expenses by enabling a more streamlined tooling, storage, and shipment process.
Development of this rust preventative designed for tight tolerances is a nice example of how Cortec® is able to adapt technology to special end-user needs in order to provide the optimal product characteristics for a specific application.
VpCI®-277 conforms to ASTM D1748 (Humidity), ASTM D1735 (Water Fog), MIL-C-83993 (Water Displacement), and NACE RP0487-2000 (Selection of Rust Preventives) standard test methods.