VpCI®-347 Corrosion Inhibitor/Heavy Duty Lubricant


 Liquid that provides corrosion protection for multimetals. Dilutable with water up to 1:40. Excellent lubricating and corrosion inhibiting properties. Replaces slushing oils on cold rolled and galvanized steel. For use as a metal-forming lubricant and synthetic machining coolant. VpCI®-347 is formulated for deep-draw applications.


VpCI®-347 is a multifunctional corrosion inhibitor/heavyduty lubricant concentrate for metalworking operations. High performance characteristics make VpCI®-347 ideally suited for
heavy-duty cutting, milling, turning, drilling, boring, broaching, gear cutting, and other machining operations. VpCI®-347 contains lubricating and corrosion inhibiting compounds, and is resistant to rancid attack by bacteria. When used as directed, VpCI®-347 prevents corrosion during in-plant processing, storage, and export shipment for up to 24 months, while also eliminating problems caused by petroleum-based products.

• Low to no smoke or burning vapors
• Low foaming
• Prevents corrosive attack caused by chlorides, aggressive industrial gases and acidic atmospheres
• Effective in high humidity (laboratory tests of standard cold-rolled steel panels showed no signs of corrosion at 100% relative humidity after 2,000 hr. per ASTM D-1748)
• Provides excellent drawability, lubricity and wetting under pressure
• Displaces water and oil from metal surfaces, leaving a thin transparent film
• Economical (can be diluted up to 1 part VpCI®-347 to 40 parts water)
• Protects ferrous and non-ferrous metals
• Easy to remove from metal surfaces
• Contains no chlorinated compounds, chromates, or nitrites
• Eliminates cleaning and housekeeping problems associated with rust inhibiting oils
• No need for slushing oils
• Weldable in most cases.
• Resistant to rancid attack by bacteria
• Forms a transparent film
• NATO #6850-66-132-6101
• NSN 6850-01-470-2740

• Lubricant for heavy-duty rolling, drawing, extruding, stamping and cutting
• In-plant machining
• Protection of hot-rolled, cold-rolled, galvanized, and aluminized steel
• Corrosion protection for bearings, piping and tubular parts, housings, stampings, bar and roll stock, and structural steel during in-plant storage or domestic and export shipments
• Coolant for machining of castings, highly polished pieces and other parts; providing superior protection between machining operations and further processing or assembly

• Carbon steel
• Aluminum
• Cast iron
• Stainless steel
• Copper



Appearance                            Brown to tan viscous liquid

Film Type                               Non-drying

pH                                           10-11 (1% water)

Pour Point                               21ºF  (-6ºC)

Removal Methods                  Alkaline cleaners (VpCI-410 series)

Viscosity                                7,000-13,000 cps

Density                               8.2-8.7 lb/gal (0.98-1.04 kg/l)



Product Preparation:
Add VpCI®-347 to water using a high dispersion mixing blade. Mix for at least 5-10 minutes. VpCI®-347 can be mixed in this manner at higher concentrations (20-50%) and then added into larger volumes of water.

Methods for monitoring solution:
Refractometer, pH

Recommended applicators and dilutions:
Grinding disks 1:40
Draw bench 1:30
Straight and cut 1:40
CNCs 1:30 to 1:40

Product cleanup:
Use soap and water to clean equipment.

Add VpCI®-347 to water as follows for:

Short-term protection
(1-6 months): 1 part concentrate to 20-40 parts water

Medium-term protection (6-12 months): 1 part concentrate to 15-20 parts water

Protection up to 2 years
and/or lubricity: 1 part concentrate to 10-15 parts water


Shell 4-Ball E.P. Test (ASTM D-2783)

Cortec® VpCI®-347 in Tap Water

2.5% 5% 10%
lb kg lb kg lb kg
Seizure 139 63 220 110 278 126
Weld 278 126 353 160 353 160
Load Wear index 65 29 97 44 88 40


Shell 4-Ball Wear Test (ASTM D-2266)

Cortec® VpCI®-347 in Tap Water


2.5% 5% 10%
Average Coefficient of Friction 0.88 0.108 0.101
Average Scar Diameter (mm) 0.90 0.69 0.81


Tapping Torque Test

Cortec® VpCI®-347 in Tap Water


2.5% 5% 10% Reference
Torque 77.87 10.35 10.20 12.53
Torque (lb/kg) 42.73-19.4 10.35-4.7 36.83-16.7 42.11-20.5
% Efficient 106 121 122 100



VpCI®-347 is available in 5 gallon (19 liter) pails, 55 gallon (208 liter) drums, liquid totes, and bulk. The product should be sealed and stored in a heated warehouse to avoid freezing. VpCI®-347 has a shelf life of 24 months.

Minimum storage temperature: 32ºF (0ºC)
Maximum storage temperature: 120ºF (49ºC)



ASTM D-1748 Humidity Test
ASTM D-4627 Cast Iron Chip Test
ASTM D-2783 4-Ball E.P. Test
ASTM D5619 Tapping Torque Test
ASTM G-31 Immersion Corrosion Testing
NACE RP0487-2000 Selection of Rust Preventives