Cortec VpCI 326 Corrosion Inhibitor Oil Additive


VpCI-326 is a corrosion inhibitor oil additive for hydraulic oil and gearbox assemblies. VpCI-326 performs effectively under the adverse conditions of 100% relative humidity, and in the presence of such corrosive species as chlorides, sulfur compounds, or hydrogen sulfide. VpCI-326 contains no hazardous chromates, nitrites, or phosphate inhibitors.


VpCI-326 utilizes the finest paraffinic petroleum distillates as carriers. VpCI-326 possesses an exceedingly high flash point, enhancing in-plant safety when compared to common oil protectants.


VpCI-326 is supplied in concentrate form, which is easily diluted with lubricating, hydraulic, or preservative oils; saving shipping and inventory expense.


• VpCI-326 provides universal corrosion protection to ferrous and non-ferrous metals
• VpCI-326 is nitrite-free, non-toxic, and thermally stable, providing long-lasting contact and vapor phase corrosion protection
• With VpCI-326, most lubricants can be upgraded in their anti-corrosion ability providing continuous corrosion protection during operation, standby, and shutdown periods
• Passes through 1 micron filter
• Conforms to MIL-PRF-46002C
• Conforms to MIL-I-85062 (Additives to oils)
• Conforms to MIL PRF-16173E
• NATO 6850-66-132-6100
• NSN 6850-01-470-3358



Fog interiors with VpCI-326 concentrate at 1 liter/m3 (1 oz/ft3) of enclosed space. VpCI-326 is not recommended for applications involving direct contact with water. Contact Cortec for application questions.

Product Details

Product Code(s) Packing Size
VPCI-326-5 Cortec VpCI 326 Corrosion Inhibitor Oil Additive (5 gal. pail)
VPCI-326-55 Cortec VpCI 326 Corrosion Inhibitor Oil Additive (55 gal. drum)


Metals Protected • Ferrous
• Zinc
• Aluminum
• Galvanized Steel
• Copper
• Cadmium
• Silver, brass, and many other alloys.
Typical Properties  
Appearance Clear to slightly hazy yellow liquid
Corrosion Resistance Up to 24 months
Coverage 960-1456 ft2/gal / (24-36 m2/l)
Film Type Oily, paraffinic
Film Thickness 0.5-1 mil (12.5-25 microns)
Flash Point >230ºF (>110ºC)
Non-volatile Content 83-93%
pH 8.7-10.0 (1% solution)
Removal Method Petro-solvents/alkaline cleaners
Density 7.2-7.4 lb/gal / (0.86-0.89 kg/l)

Additional Information

Additional Information